Entries |
Document | Title | Date |
20090021198 | Motor Drive Control System and Method for Controlling the Same - In a motor drive control system configured to include a converter capable of stepping up the voltage, when the locked state of MG | 01-22-2009 |
20090033257 | Voltage Control of Upconverter in a Motored Vehicle Drive - When an ECU receives a transmission signal having a high level from a transmission, the ECU exerts torque reduction control to reduce a torque control value for a motor generator. Furthermore the ECU sets an optimum (or target) value of a voltage as based on the torque control value and a motor rotation speed and controls an upconverter. Herein, when the transmission is shifting gears, the ECU controls the upconverter to allow the voltage to be constant regardless of whether the torque reduction control is exerted to reduce the torque control value. | 02-05-2009 |
20090033258 | MOTOR CONTROLLER - A motor controller for an axial-gap motor permits a reduced size of the entire system of including a drive circuit and a power source of the motor, reduced cost, and higher reliability to be achieved by controlling the energization mode of the motor. The motor controller has a torque command determiner which inputs a first DC voltage to a first inverter at least either when a rotor is at a halt or when the number of revolutions of the rotor is a predetermined number of revolutions or less, supplies a field axis current for changing the magnetic flux of a field of the rotor to a first stator from the first inverter such that the amount of energization is temporally changed, converts an induced voltage developed in a second stator by the supplied field axis current into a second DC voltage by a second inverter, and outputs the second DC voltage, thereby charging a second battery. | 02-05-2009 |
20090115359 | ADJUSTMENT DEVICE FOR A MOTOR VEHICLE SEAT - An adjustment device for a motor vehicle seat that includes an electric motor, a gear connected to the electric motor, a mechanical adjustment unit connected to the gear and a control circuit, at least one sensor being associated with the control circuit for detecting a critical situation of the motor vehicle and the control circuit providing an operating voltage for the electric motor, characterized in that the control circuit provides as an alternative, in addition to the normal operating voltage, an overvoltage for supplying the electric motor, that the normal operating voltage applies in a normal driving condition of the motor vehicle in which the sensor does not deliver any signal, that the overvoltage applies at the electric motor in a driving condition after the sensor has delivered a signal indicating that the driving condition is no longer normal and that the overvoltage is at least 150% of the value of the normal operating voltage, more specifically at least 200% of the value of the normal operating voltage. | 05-07-2009 |
20090140675 | Door drive - The present invention relates to a door drive comprising electrically operated components which are supplied with electrical energy via a mains connection. In accordance with the invention, a control and an electrical energy store are provided, with the control separating the door drive from the mains and the electrical energy store providing the electrical energy in a first operating mode and with the control connecting the door drive to the mains in a second operating mode. | 06-04-2009 |
20090160378 | Motor controller of air conditioner - The present invention relates to a motor controller for air conditioner including a converter converting AC utility power into DC power; an inverter for compressor having a plurality of switching elements for inverter, the inverter converting the DC power into predetermined AC power by a switching operation to drive a three-phase motor; and a microcomputer controlling the converter and the inverter and outputting an inverter switching control signal to the inverter, wherein the microcomputer enables a control period of the inverter to conform to a period of an inverter interrupt signal for outputting the inverter switching control signal. The present invention may reduce manufacturing costs. | 06-25-2009 |
20090189553 | Method and system for multiphase current sensing - A multiphase current sensing method wherein the sum of the phase currents is zero including: sensing a.c. and/or d.c. currents in first and second phases; sensing a.c. current in a predetermined a.c. frequency range in a third phase; and combining the current sensed in the first and third phases and the second and third phases and determining a gain correction factor to be applied to the currents sensed in the first and second phases. | 07-30-2009 |
20090200970 | CHOPPER CONTROL SYSTEM FOR ROTARY MACHINES - A control apparatus is to drive a power converter. The power converter has a power supply unit, a switching member electrically connected to the power supply unit, and a power accumulator electrically connected to the switching member. The control apparatus controls a rotary machine with a terminal electrically connected to the power accumulator. A calculator calculates, based on a command voltage to the rotary machine, a command value for an output current to the power accumulator and the rotary machine. A chopper control unit carries out chopper control of the power converter by switching on and off the switching member based on the command value for the output current to thereby convert a voltage across the power accumulator into a desired voltage relation to a voltage of the power supply unit. | 08-13-2009 |
20090206781 | ALTERNATING CURRENT MOTOR DRIVE CIRCUIT AND ELECTRIC VEHICLE DRIVE CIRCUIT - A current source rectifier is provided at an output of an alternating current generator, an alternating current motor is connected to an output of the rectifier via a voltage source inverter, furthermore, two arms having switching elements connected in inverse parallel to diodes are connected to the output of the rectifier, and one terminal of a direct current power source capable of a power supply and absorption is connected to a midpoint between the arms, while the other terminal thereof is connected to a neutral point of motor coils or generator coils, thereby eliminating a need for a large volumetric reactor in a direct current chopper, achieving a downsizing of the circuit. | 08-20-2009 |
20090212725 | Drive System and Method for Operating a Drive System for an Electronically Operated Vehicle - The invention relates to a drive system for an electrically driven vehicle, comprising an electric drive unit ( | 08-27-2009 |
20090212726 | DEVICE FOR PROTECTING A SPEED CONTROLLER AGAINST OVERCURRENT - The invention relates to a speed controller comprising:
| 08-27-2009 |
20090218967 | Motor Drive Circuit - A motor drive circuit comprises positive and negative input terminals for connection of the motor circuit to a DC supply, a DC link filter connected between the input terminals: an electric motor having at least two phases, a plurality of motor drive sub-circuits, each connected to a respective phase of the electric motor and which each control the flow of current into or out of the respective phase of the motor that has been drawn from the supply through the DC link filter, and a switching means provided in the electrical path between the DC link filter and the electric motor drive sub-circuits, the switching means being movable between a closed position in which it connects the DC link filter to the motor drive sub-circuits, and an open position which isolates the DC link filter from the motor drive sub-circuits. | 09-03-2009 |
20090230901 | Power Source Apparatus for Vehicle, Vehicle and Method of Controlling Power Source Apparatus - A vehicle ( | 09-17-2009 |
20090230902 | INVERTER SYSTEM FOR VEHICLE-MOUNTED AIR CONDITIONER - The object is to provide an inverter system for a vehicle-mounted air conditioner capable of reducing standby power requirements during nonuse. The voltage supply from a communication power source | 09-17-2009 |
20090230903 | INVERTER CONTROLLER AND METHOD FOR OPERATING THE SAME - The present invention provides an inverter controller and a method for operating the inverter controller, enabling continuous operation without requiring difficult adjustments and without causing a trip or unnecessary torque ripple at overvoltage or undervoltage during an instantaneous power failure or during regenerative operation. | 09-17-2009 |
20090237016 | MOTOR CONTROLLER - A motor controller capable of effectively utilizing electrical energy accumulated in a capacitor and achieving a reduction in capacitance of the capacitor. The motor controller includes a converter that receives an input AC voltage and performs AC-to-DC power conversion thereon, an inverter that receives DC power and performs DC-to-AC conversion thereon, and a capacitor and a charging/discharging control circuit connected in parallel with a DC link between the converter and the inverter. Electrical energy is supplied from the capacitor to the DC link via the charging/discharging control circuit. The charging/discharging control circuit has a circuit for discharging electrical energy accumulated in the capacitor and for stepping up a voltage of the capacitor when discharging the electrical energy. | 09-24-2009 |
20090237017 | Circuit Unit for Driving an Electronically Commutated Fan Motor - The invention relates to a circuit unit for driving an electronically commutated fan motor with a power stage for driving windings of the fan motor and with a control stage for driving the power stage. The circuit unit is distinguished in that an operating voltage of the control stage is separated from an operating voltage of the power stage by a diode and in that an arrangement is provided for smoothing the operating voltage of the control stage. | 09-24-2009 |
20090261762 | Drive device, hybrid vehicle equipped with the drive device, and control method for drive device - A drive device having at least one electric motor that inputs and outputs motive power includes: a plurality of capacitors; a plurality of relays for capacitors that connects and disconnects the motor and the capacitors; and a relay control device that controls the relays for capacitors. The relay control device controls the plurality of relays for capacitors so that during a system start-up, a part of the plurality of relays for capacitors are connected, that is, a partially-on-state is established, after a first predetermined condition is satisfied during the partially-on-state, the part of relays for capacitors are disconnected and a remaining part of the plurality of relays for capacitors are connected, and after a second predetermined condition is satisfied during the remainder-on-state, all the plurality of relays for capacitors are connected. | 10-22-2009 |
20090278483 | CONTROL APPARATUS FOR ELECTRIC VEHICLES - A motor control apparatus for an electric vehicle has an AC motor system including a power conversion unit and a motor/generator. The power conversion unit performs conversion between DC power and AC power to drive the motor/generator. The motor control apparatus further includes a decoupling control section configured to perform decoupling control, which restricts interference between system voltage control and motor torque control, by correcting a control state amount of one of the system voltage control and the motor torque control by a control state amount of the other of the system voltage control and the motor torque control. | 11-12-2009 |
20090309525 | DRIVE FOR MOTOR - A drive for motor that can be operated up to a high load while improving efficiency of an inverter is provided. The drive for a motor includes: a voltage conversion circuit | 12-17-2009 |
20100019703 | Dual power supply type brushless fan motor speed control device - A dual power supply type brushless fan motor speed control device for controlling the speed of the fan motor of a ceiling fan formed of a DC power supply circuit unit, a central processing unit, a medium and high speed power supply control unit, a low-speed power supply control unit, a back electromotive force detection circuit unit and three drive output control circuit units. | 01-28-2010 |
20100019704 | Single-phase brushless DC motor drive circuit - A motor drive circuit for driving a single-phase brushless DC motor includes a rotatably supported magnet rotor having magnetic poles, a stator core provided with slots and teeth, the teeth being arranged to face the magnet rotor, and a motor coil held in the slots. The single-phase brushless DC motor drive circuit further includes a plurality of magnetic pole position detectors for outputting detection signals indicative of magnetic pole positions of the magnet rotor, a rotation direction instruction circuit for issuing an instruct of a rotation direction of the magnet rotor, a selector circuit for selectively outputting the detection signals of the magnetic pole position detectors, a switching circuit for driving the motor coil and a control circuit for, based on the selectively outputted detection signals from the selector circuit, controlling the switching circuit to thereby control a direction and a magnitude of current flowing through the motor coil. | 01-28-2010 |
20100019705 | ELECTRIC POWER CONVERSION CIRCUIT, AND CONTROL DEVICE FOR MULTIPHASE ELECTRIC ROTARY MACHINE - An EPC connected between a three phase motor and a battery fixes a voltage of the V phase of the three phase motor to a voltage potential of a positive electrode of the battery. A converter unit is placed for each of the U and W phases of the three phase motor. Each of the converter units has a chopper circuit part and a capacitor Each of the converter units converts the voltage of the battery to a desired voltage. The voltage of each of V and W phases is adjusted until the voltage of being twice of the voltage of the battery based on the voltage potential at the positive electrode of the battery as a reference voltage. This makes it possible to adjust the absolute value of a line voltage between V and W phases until the voltage of the battery as an upper limit voltage. | 01-28-2010 |
20100026217 | Rotating electrical machine control system and vehicle drive system - A rotating electrical machine control system includes a frequency converting portion that is interposed between a rotating electrical machine for driving a vehicle and a DC power source for supplying electric power to the rotating electrical machine, and that converts an output of the DC power source to an AC output at least during a powering operation of the rotating electrical machine; a voltage converting portion that is interposed between the DC power source and the frequency converting portion, and that boosts the output of the DC power source based on a boost command value which is set according to a target torque and a rotational speed of the rotating electrical machine; and a control portion for controlling the frequency converting portion and the voltage converting portion. | 02-04-2010 |
20100026218 | Rotating electrical machine control system and vehicle drive system - A rotating electrical machine control system includes a frequency converting portion that is interposed between a rotating electrical machine for driving a vehicle and a DC power source for supplying electric power to the rotating electrical machine, and that converts an output of the DC power source to an AC output at least during powering operation of the rotating electrical machine; a voltage converting portion that is interposed between the DC power source and the frequency converting portion, and that boosts the output of the DC power source based on a boost command value which is set according to a target torque and a rotational speed of the rotating electrical machine; and a control portion for controlling the frequency converting portion and the voltage converting portion. | 02-04-2010 |
20100060212 | Control Apparatus for Electric Railcar - A control apparatus for an electric railcar includes an inverter that exchanges power with an AC rotating machine, a filter capacitor connected in parallel to a DC side of the inverter, a filter reactor provided between the filter capacitor and an overhead line, an overhead line voltage measuring instrument that measures a voltage value of the overhead line, a voltage increase detection unit that senses an amount of voltage increase occurring when, with an overhead line voltage being supplied, the overhead line voltage goes beyond a reference voltage value and rises at a rate equal to or higher than that by a predetermined time constant. A correction torque command value calculation unit calculates a correction torque command value that is corrected so that a torque command value to be received from an external unit becomes smaller for a predetermined time elapsing after the voltage increase detection unit has sensed, during regeneration operation of the inverter, an amount of voltage increase more than a predetermined range. A vector control unit controls the inverter so that the AC rotating machine develops torque coincident with the correction torque command value. | 03-11-2010 |
20100066285 | BRUSHLESS MOTOR DRIVE - A drive circuit for a motor having a plurality of phases, comprising an input for a DC signal and a plurality of phase outputs, the circuit being arranged to provide at each of the phase outputs, in use, current to one phase of the motor, in which there is provided a converter for each phase output, each converter being arranged to take as an input a DC signal and output an signal having an AC component with a higher voltage magnitude than that of the DC signal input to the converter. Typically, the converters comprise Ćuk converters. | 03-18-2010 |
20100079093 | ELECTRIC POWER CONVERTER - Specific anomalies and details of failures as well as measures thereagainst are described that might possibly occur in electric power converters that drive and control permanent-magnet synchronous motors. An electric power converter capable of stable operation has a protective function of taking proper measures against such failures that might possibly occur. | 04-01-2010 |
20100085001 | INVERTER DEVICE - There is provided an inverter device capable of simplifying the circuit structure, lowering the cast, and downsizing of the device. The inverter device detects a switching change of an inverter by a pulse and is equipped with a pulse signal detector capable of detecting a motor residual voltage or a phase and a detector for detecting a residual voltage or a phase. The inverter device includes a voltage detector, a circuit for detecting a pulse signal based on a comparison between a phase voltage detection value per one phase output from the voltage detector and a first reference voltage value, a circuit for detecting a line residual voltage based on phase voltage detection values of two phases output from the voltage detector, and a circuit for detecting a line phase based on a comparison between the line residual voltage and a second reference voltage value. | 04-08-2010 |
20100090628 | GENERATOR MOTOR DRIVING DEVICE AND METHOD FOR DISCHARGING CHARGES FROM CAPACITOR OF GENERATOR MOTOR DRIVING DEVICE - The present invention provides a generator motor driving device that can promptly perform discharging of charges from the capacitor during a maintenance operation, and a capacitor discharge method to be implemented in the generator motor driving device. Power is supplied from the capacitor to the generator motor being driven by the engine, and the generator motor is driven, with the engine as a load. Rated constant current control is performed on the generator motor, and rated constant voltage control is performed on the booster, until the capacitor voltage decreases to a first voltage. After the capacitor voltage decreases to the first voltage, the rated constant current control is performed on the generator motor, and voltage control is performed on the booster to maintain a predetermined ratio between the capacitor voltage and the booster output voltage to be output to the driver, until the capacitor voltage decreases to a second voltage that is lower than the first voltage. | 04-15-2010 |
20100097018 | VEHICLE CONTROL SYSTEM - In a vehicle control system that includes an engine, a first rotary electric machine, a second rotary electric machine and a transmission, a control unit includes a shift state acquisition module that acquires a shift state of a vehicle; a stepped-up voltage reduction permission module that determines whether reduction of a system voltage is permitted on the basis of the acquired shift state; a stepped-up voltage reduction execution module that reduces the system voltage to a predetermined upper limit voltage when reduction of the system voltage is permitted; and a drive control module that controls operations of a converter and inverter to thereby control the first rotary electric machine and the second rotary electric machine. | 04-22-2010 |
20100109585 | AC motor driving circuit and electric car driving circuit - In an AC motor driving circuit, a current-type rectifier circuit having a filter circuit and first bidirectional switches bridge-connected to the filter circuit is provided in an output of an AC power supply. An AC motor is connected to an output of the rectifier circuit through a voltage-type inverter. One terminal of each of second bidirectional switches is connected to corresponding one of output terminals of the current-type rectifier circuit. The other terminals of the second bidirectional switches are collectively connected to one terminal of a series circuit having a DC power supply and a reactor. The other terminal of the series circuit is connected to one output terminal of the current-type rectifier circuit. With this configuration, a large capacitor for a DC link can be dispensed with, so that a reduction in circuit size and weight can be attained. | 05-06-2010 |
20100117569 | SYNCHRONOUS ELECTRICAL MACHINE - A synchronous electrical machine comprising a plurality of phases, detecting means arranged to detect a fault in at least one of the phases of the synchronous electrical machine, isolating means arranged to isolate the at least one phase of the synchronous electrical machine with the fault, phase shift means arranged to produce a controlled phase shift between the voltage and the current within the remaining phases of the synchronous electrical machine to adjust the phase angle and magnitude of the second harmonic powers produced by the remaining phases of the synchronous electrical machine such that the vector sum of the second harmonic power vectors of the remaining phases of the synchronous electrical machine is zero. | 05-13-2010 |
20100117570 | POWER CONVERSION DEVICE - A boost power module and an inverter form a semiconductor module. A smoothing capacitor is arranged outside the semiconductor module. A bus bar forming a power supply line is divided into bus bars, between which a lead member extending outward from the semiconductor module is coupled. The lead member has an electric contact with one of terminals of the capacitor arranged outside the semiconductor module. A bus bar forming an earth line is divided into bus bars, between which a lead member extending outward from the semiconductor module is coupled. The lead member has an electric contact with the other terminal of capacitor. | 05-13-2010 |
20100134054 | FAN AND MOTOR CONTROL DEVICE - A fan includes a motor control device which is electrically connected with a motor and an alternating current power source. The motor control device includes a converting circuit, a power factor correction circuit and a motor controlling circuit. The voltage of the alternating current power source is converted to be direct current voltage by the converting circuit and the power factor correction circuit, and then the direct current voltage is outputted to the motor control circuit. The motor controlling circuit generates a driving signal in accordance with the direct current voltage for driving the motor to operate. | 06-03-2010 |
20100141188 | MOTOR DRIVE - [Task] A high-speed driving is possible, a utilization of a power supply having a low voltage is possible, and a regeneration is easy to be carried out. | 06-10-2010 |
20100148708 | VOLTAGE SCALING OF AN ELECTRIC MOTOR LOAD TO REDUCE POWER CONSUMPTION - Embodiments of an apparatus to increase the power efficiency of an electric motor load have been presented. In one embodiment, the apparatus includes a parameter detection circuit coupled to the electric motor load to detect one or more parameters of the electric motor load. Furthermore, the apparatus may include a power management controller coupled to the parameter detection circuit to receive the one or more parameters and to scale a voltage supply to the electric motor load in response to the parameters. | 06-17-2010 |
20100181948 | Motor apparatus with voltage step-up function - The motor of the motor apparatus includes a rotor including a plurality of magnetic poles and a stator formed with tooth portions radially extending with a pitch equal to 5/6 times or 7/6 times a pole pitch of the rotor. Each tooth portion is formed with a brim portion circumferentially extending from both circumferential sides of the tooth portion. The phase ends of the stator winding are connected respectively to the AC ends. The DC power supply is connected between one of the DC ends and the neutral point of the stator winding. The control section controls the multi-phase inverter such that a multi-phase AC current containing a DC component flows through the stator winding. The circumferential width of the brim portion is smaller than or equal to 0.75 times a cross-sectional size of the electric wires constituting the stator winding. | 07-22-2010 |
20100194318 | Power Supply System Provided With a Plurality of Power Supplies, and Vehicle Provided With Such Power Supply System - A power supply system is provided with a plurality of driving motors, a power converter, and a plurality of power supplies which supply the driving motors with power and have different output voltages. Each power supply is connected with at least one driving motor through the power converter and with at least one driving motor through a path which does not include the power converter. | 08-05-2010 |
20100201294 | VARIABLE MAGNETIC FLUX DRIVE SYSTEM - A variable magnetic flux motor drive system includes: a variable magnetic flux motor having a variable magnet which is a low-coercive permanent magnet; an inverter that drives the variable magnetic flux motor | 08-12-2010 |
20100207556 | AC/DC CONVERTING CIRCUIT AND MOTOR CONTROLLER USING THE SAME - An AC/DC converting circuit, has a full-bridge rectifier having two input terminals and two output terminals, a first capacitor, a second capacitor, an electronic switch having a control terminal, a trigger circuit having an input terminal and an output terminal, and a detecting circuit having an input terminal and an output terminal. The first capacitor and the second capacitor are serially connected between the output terminals of the full-bridge rectifier, the input terminals of the full-bridge rectifier are connected to an AC input, one end of the electronic switch is connected between the first capacitor and the second capacitor, the other end of the electronic switch is connected to one of the output terminals of the full-bridge rectifier, the input terminal and the output terminal of the detecting circuit are connected to the output terminals of the full-bridge rectifier, the output terminal of the detecting circuit is connected to an input terminal of the trigger circuit, and the output terminal of the trigger circuit is connected to the control terminal of the electronic switch. | 08-19-2010 |
20100225258 | CONTROL OF AN ALTERNATOR-STARTER FOR A HYBRID ELECTRIC VEHICLE HAVING A DISCONNECTED HIGH-VOLTAGE BATTERY - A hybrid powertrain system includes an electric motor/generator unit having a multiphase asynchronous AC machine electrically connected to a multiphase bridge inverter. A high-voltage capacitor is electrically connected between positive and negative sides of a high-voltage DC power bus. High-voltage DC bus pre-charge circuits are electrically connected between gate drive bias power supplies and the multiphase bridge inverter. A low-voltage battery electrically charges the high-voltage DC link capacitor via the gate drive bias power supplies and the high-voltage DC bus pre-charge circuits when the high-voltage energy storage system is disconnected from the high-voltage DC power bus. | 09-09-2010 |
20100231150 | POWER CONVERTER AND MOTOR DRIVING SYSTEM - An object of the present invention is to provide a power converter in which the open-phase can be detected in a broader frequency region even if a predetermined relation is kept between the output voltage and the frequency. In order to achieve the above objects, a power converter including: an inverter unit having phase unit inverters provided with a plurality of multiple connected single-phase cell inverters for every phase; an inverter controller for controlling the inverter unit so that a predetermined relation is kept between an output voltage and a frequency; and a plurality of transformers for detecting output voltages of the plurality of phase unit inverters, in which the inverter controller is provided with a fault detection unit for detecting whether a phase-to-phase voltage deviation calculated by the output voltage is within range of an allowable voltage deviation calculated as a function of the frequency is provided. | 09-16-2010 |
20100259205 | SYSTEM FOR POWERING AN ELECTRIC MACHINE - The invention relates to a system ( | 10-14-2010 |
20100283415 | Motor Drive System with Flux Regulated PM Generator - A method of generating and controlling power for an alternating current (AC) motor by means of at least one controlled permanent magnet machine (PMM) with a permanent magnet (PM) rotor and a stator with a magnetic flux diverter circuit for controlling the output of the PMM, comprises the steps of: rotating the PM rotor at a velocity sufficient to develop a high frequency alternating current (HFAC) power output from the stator; transforming the HFAC output to produce a variable low frequency alternating current (AC) motor control output for the motor; sensing desired motor control parameters; generating a control signal responsive to the sensed parameters; and applying the control signal to the magnetic flux diverter circuit to control the motor control output. | 11-11-2010 |
20100289438 | BI-POWER MOTOR CONTROLLING SYSTEM AND MOTOR CONTROLLING APPARATUS THEREOF - A bi-power motor controlling system includes a motor, a system apparatus and a motor controlling apparatus, which is electrically connected with the motor and system apparatus respectively. The system apparatus has a rotational-speed target value for determining the targeted rotational speed of the motor. In addition, the system apparatus outputs a first power and a second power to the motor and the motor controlling apparatus, respectively. The motor controlling apparatus detects the motor to obtain a first rotational-speed value of the motor, and then adjusts the rotational speed of the motor to a second rotational-speed value according to the first rotational-speed value. Then, the motor controlling apparatus further generates a rotational-speed feedback signal to the system apparatus. The system apparatus adjusts the outputted first power in accordance with the rotational-speed feedback signal to make the rotational speed of the motor reach the rotational-speed target value. | 11-18-2010 |
20100301788 | Control device for electric motor drive device - A control device that includes an AC voltage command determination section that determines an AC voltage command value, which is a command value of the AC voltage supplied from the DC/AC conversion section to the AC electric motor, on the basis of a target torque of the AC electric motor and a rotational speed of the AC electric motor; and a system voltage command determination section that determines a system voltage command value, which is a command value of the system voltage generated by the voltage conversion section, on the basis of the AC voltage command value and the system voltage. | 12-02-2010 |
20100315027 | Procedures and Control System to Control a Brushless Electric Motor - The present invention relates to a method and a control system for driving a three-strand brushless, electronically commutated electric motor ( | 12-16-2010 |
20100320946 | BRUSHLESS DC MOTOR DRIVER - A brushless DC motor driver has a DC-AC converter circuit, a detection circuit, a comparison circuit and a control circuit. The DC-AC converter circuit has switching elements. The detection circuit is configured to detect an electric current flowing through a motor coil of a brushless DC motor. The comparison circuit is configured to, if the electric current reaches or exceeds an over-current threshold, generate an over-current detection signal. The control circuit is configured to unenergize the switching elements for a first breaking time if the detection circuit generates the over-current detection signal in a start phase. The control circuit is also configured to unenergize the switching elements for a second breaking time longer than the first breaking time if the detection circuit generates the over-current detection signal in a steady phase. | 12-23-2010 |
20110006709 | METHOD AND APPARATUS FOR AC MOTOR CONTROL - An alternating current motor control system constituted of: a control unit; a cycloconverter functionality; a phase control functionality; and a semiconductor switching unit comprising a plurality of electronically controlled semiconductor switches each associated with a particular winding of a target alternating current motor and each independently responsive to the control unit. In one embodiment the semiconductor switching unit is arranged to connect the windings of the target alternating current motor to a three phase power input in one of a star and a delta configuration responsive to the control unit. | 01-13-2011 |
20110018480 | CONVERTER CIRCUIT - A converter circuit includes a phase circuit having a switch module, a first winding, a first diode, a second winding, and a second diode. The second winding is inductively coupled to the first winding. A multi-phase motor including the converter circuit, and a related method of controlling such a motor, are also provided. | 01-27-2011 |
20110025239 | Electro-motive machine using halbach array and electrons trapped in electromagnetic providing current - A Halbach array is radially disposed in an environment optimized for efficiency and controlled for efficient generation and use of power in order to generate, establish, and maintain a desired level of rotational energy with enhanced efficiency. | 02-03-2011 |
20110025240 | Power Conversion Device - A power conversion device comprises a power conversion unit of a three phase full bridge type including upper arm switching devices and lower arm switching devices, and a controller that outputs drive signals to these switching devices. This power conversion device forms alternately a first interval in which the upper arm switching devices and the lower arm switching devices are switched to ON for different phases, and a second interval in which, for all phases, either the upper arm switching devices or the lower arm switching devices are switched to ON, according to electrical angle. | 02-03-2011 |
20110031910 | CONTROL APPARATUS FOR ELECTRIC ROTATING MACHINE - The control apparatus controls a controlled variable of the electric rotating machine by manipulating an output voltage of a power converter circuit including switching elements operated at a set modulation index to connect positive and negative terminals of a DC power source to corresponding terminals of the electric rotating machine. The control apparatus includes a prediction section configured to predict the controlled variable for each of a plurality of cases where the power converter circuit is set in a corresponding one of a plurality of predetermined operating states, a manipulation section configured to determine one of the predetermined operating states depending on a result of evaluation by an evaluation function, and set the converter circuit to the determined operating state, and a feedback control section configured to feedback-control the output voltage of the power converter circuit at a target value by manipulating the input parameters of the evaluation function. | 02-10-2011 |
20110031911 | POWER FACTOR CORRECTION WITH VARIABLE BUS VOLTAGE - A controller includes a voltage determination module, a bus voltage command module, and a power factor correction (PFC) control module. The voltage determination module determines a desired direct current (DC) bus voltage for a DC bus electrically connected between a PFC module and an inverter power module that drives a compressor motor. The voltage determination module determines the desired DC bus voltage based on at least one of torque of the compressor motor, speed of the compressor motor, output power of the inverter power module, and drive input power. The bus voltage command module determines a commanded bus voltage based on the desired DC bus voltage. The PFC control module controls the PFC module to create a voltage on the DC bus that is based on the commanded bus voltage. | 02-10-2011 |
20110050136 | Driving apparatus for a vehicle-mounted electric motor - An inverter circuit for a motor outputs three-phase AC currents, which are outputted from common connection points to stator coils, based on output voltage of a DC power source and a power supply capacitor by a switching operation of transistors. An inverter control circuit determines that a system main relay is turned off, upon receiving a main relay-off signal from an electronic control unit. The inverter control circuit turns on the low-side transistors, while turning off the high-side transistors. A discharge current flows from the positive electrode to the negative electrode of the power supply capacitor through the stator coil and the low-side transistors, so that electric charge stored in the power supply capacitor is discharged. | 03-03-2011 |
20110068723 | System For Operating DC Motors And Power Converters - A system is disclosed for driving a DC motor ( | 03-24-2011 |
20110080124 | INVERTER APPARATUS, INVERTER CONTROL SYSTEM, MOTOR CONTROL SYSTEM, AND METHOD OF CONTROLLING INVERTER APPARATUS - An inverter apparatus according to the invention includes a heat sink, an inverter that includes a semiconductor device and that is attached to the heat sink, detectors that detect the temperature of the inverter, an estimator that calculates estimated values of the thermal resistance and the thermal capacity of the heat sink on the basis of the temperature detected by the detectors, and a controller that controls driving of the inverter on the basis of the estimated values. | 04-07-2011 |
20110089872 | DIPOLAR AXIAL COMPRESSION PERMANENT MAGNET MOTOR - The present invention relates to a system and a method for improving the use of energy in an electric motor by inducing currents generated from magnets that result in an increase of primary power and creating, directing and introducing a counter current obtained from primary coils of the motor into a resonant LC circuit which is introduced as a transient secondary process to increase the overall efficiency of the motor. Furthermore, this motor produces rotational torque without using alternating magnet polarity, but rather magnetic compression that utilizes permanent magnets arranged in a dipolar manner around an axial plane. | 04-21-2011 |
20110089873 | POWER SUPPLY DEVICE - A power supply device for a variable rotation speed drive includes a free-running converter connected to a land-based power grid, and an inverter connected to the variable rotation speed drive. A direct-current cable electrically connects the DC side of the converter with the DC side of the inverter. The inverter includes a plurality of phase modules having an upper and a lower valve branches with least two series-connected, two-pole subsystems with distributed energy storage devices. The inverter is located on the seabed in immediate vicinity of the variable rotation speed drive. Signal electronics of the inverter is located on land. In this way, the distance between the power supply on land and the drive on the ocean floor can reach several hundred kilometers, with ocean depths of several kilometers. | 04-21-2011 |
20110101897 | DC BUS BOOST METHOD AND SYSTEM FOR REGENERATIVE BRAKE - Embodiments of the present invention provide novel techniques for using a switched converter to provide for three-phase alternating current (AC) rectification, regenerative braking, and direct current (DC) voltage boosting. In particular, one of the three legs of the switched converter is controlled with a set of pulse width modulation (PWM) control signals so that the input AC phase having the highest voltage is rectified and one of the switches in the two other legs is turned on to allow for added voltage. This switching activity allows for voltage from multiple AC line mains to be combined, resulting in an overall boost of the DC voltage of the rectifier. The DC voltage boost can then be applied to the common DC bus in order to ameliorate voltage sags, help with motor starts, and increase the ride-through capability of the motor. | 05-05-2011 |
20110101898 | AC-DC CONVERTER, METHOD OF CONTROLLING THE SAME, MOTOR DRIVER, COMPRESSOR DRIVER, AIR-CONDITIONER, AND HEAT PUMP TYPE WATER HEATER - A rectifier connected with an AC source through a reactor, a plurality of capacitors connected in series between output terminals of the rectifier, first switching means connected between one input terminal of the rectifier and a connection point of a plurality of capacitors, second switching means connected between the other input terminal of the rectifier and the connection point of a plurality of capacitors, and a plurality of diodes connected with the plurality of capacitors in inverse-parallel are provided. | 05-05-2011 |
20110127935 | Drive unit - The present invention relates to a drive unit for at least one electric motor. The drive unit comprises: a control power supply (+18V) for supplying the drive unit with control power, a power source ( | 06-02-2011 |
20110127936 | VOLTAGE BOOSTER APPARATUS FOR POWER STEERING SYSTEM - In a voltage booster apparatus, a charge control transistor is turned on to charge a coil output capacitor and a booster output capacitor and then turned off, thereby confirming rise of a coil output voltage and a booster output voltage. A power supply relay is turned on to restore a booster operation thereby to check rise of the booster output voltage. If both of a step-up FET and a step-down FET are not in short-circuit failure, ON state of the power supply relay is fixed thereby to restore a power steering system operation. | 06-02-2011 |
20110133677 | Circuit Arrangement for an Electric Drive - A circuit arrangement is provided for supplying an electric drive, to which at least two electric energy sources can be connected. At least one of the at least two electric energy sources supplies at least intermittently the electric drive by way of at least one actuating element. At least one electric energy source can be disconnected from the electric drive by way of a switch. Furthermore, a method for operating the circuit arrangement, as well as a motor vehicle including the circuit arrangement, are provided. | 06-09-2011 |
20110163703 | Direct Current Brushless Motor Capable Of Generating Electric Power - A direct current brushless motor capable of generating electric power includes a winding controlled by a control circuit for producing a rotating magnetic field and coupled by a neutral point, a neutral point switching circuit for controlling conduction and cut-off states between the neutral point and the winding, such that an undriven phase and the neutral point are cut off, and a recycle circuit, having a charging switch for actuating the corresponding neutral point switching circuit, and the recycle circuit is actuated according to a switching sequence of the neutral point switching circuit, such that a counter electromotive force produced by an undriven phase of the direct current brushless motor is recharged into a battery. | 07-07-2011 |
20110169435 | EC MOTOR ASSEMBLY - The present invention relates to an EC motor assembly ( | 07-14-2011 |
20110169436 | CONTROL APPARATUS FOR MULTI-PHASE ROTARY MACHINE - A control apparatus controls an inverter (electric power converter circuit) which is connected for selectively applying a plurality of voltage levels to each phase of a polyphase rotary machine. In each of successive control periods, the apparatus determines the inverter operation state (combination of respective voltage levels applied to the phases) to be set for the succeeding control period, by performing prediction calculations based on a model of the rotary machine, for each of a plurality of candidates for the next operation state, to select an optimum candidate. The candidates are restricted to those operation states whereby the voltage level of no more than one of the phases will be changed, at changeover to the operation state of the next control period. | 07-14-2011 |
20110175557 | MOTOR DRIVING APPARATUS HAVING POWER REGENERATION FUNCTION - A motor driving apparatus wherein provisions are made to ensure that the regenerative operation of a rectifier continues as long as the supply of power from an inverter continues, and that the regenerative operation of the rectifier stops when the supply of power from the inverter ends. The apparatus includes: a detection unit which detects an input voltage and current; an instantaneous effective power calculation unit which, based on the detected input voltage and current, calculates instantaneous effective power supplied from the rectifier to the inverter; a DC component calculation unit which, based on the value of the calculated power, calculates the DC component of the effective power; and a regenerative operation stopping decision unit which compares the value of the calculated DC component with a predetermined threshold value and decides that a power regeneration operation for feeding regenerative power from the inverter back into the power supply be stopped. | 07-21-2011 |
20110175558 | POWER CONVERTING APPARATUS FOR MOTOR DRIVING - A second control unit includes a current-command generating unit that generates, based on a torque command T*, a current command of the motor, a voltage-amplitude-index calculating unit that calculates, based on the current command, a voltage amplitude index (a modulation ratio PMF), a current-command adjusting unit that generates, based on the modulation ratio PMF and a frequency FINV of the motor, a current command adjustment amount dV, and a voltage command/PWM signal generating unit including a pulsation-suppression-signal generating unit that generates, based on a DC voltage EFC, a pulsation suppression signal for suppressing a pulsation component of a power supply 2f component to generate a gate signal (a PWM signal) to an inverter. | 07-21-2011 |
20110187300 | Motor Power Factor Correction Apparatus and Method - A power factor correction system includes a rectifier that rectifies the voltage of an alternating current (ac) power source to produce a voltage waveform that transitions, in a half sinusoid, from a minimum amplitude to a maximum amplitude and back to the minimum amplitude twice in the period of the ac power source. A phase winding of a motor conveys current induced by the voltage waveform, and a regulator regulates the flow of the current conveyed by the phase winding for storage as energy in a storage component. | 08-04-2011 |
20110187301 | DUAL SOURCE AUTOMOTIVE PROPULSION SYSTEM AND METHOD OF OPERATION - Automotive propulsion systems and methods of operation are provided. The automotive propulsion system includes a first voltage source, a power electronics device comprising a plurality of power switching devices coupled to the first voltage source, an electric motor having a plurality of windings coupled to the plurality of power switching devices and a neutral node interconnecting the plurality of windings, and a second voltage source coupled to the neutral node of the electric motor and the first voltage source. | 08-04-2011 |
20110199030 | MOTOR CONTROL APPARATUS AND ELECTRIC POWER STEERING SYSTEM USING THE SAME - A motor control apparatus has an inverter circuit, which includes FETs for converting electric power supplied to a motor. A capacitor is provided between a battery and the inverter circuit. A pull-up resistor connects a V-phase of the motor to a high potential side of the battery. A power supply relay permits or interrupts current flow from the battery to the capacitor and the motor. A microcomputer controls the power supply relay and the motor. The microcomputer turns on a low-side FET of a V-phase under a condition that the power supply relay is interrupting the current flow before the motor is started. Electric charge stored in the capacitor is discharged to a low potential side of the battery through the pull-up resistor. | 08-18-2011 |
20110204832 | SYSTEMS AND METHODS FOR CONTROLLING OPERATIONS OF A MOTOR - A method for controlling a motor is described. The method includes configuring a current sensor to sense a current supplied to the motor from at least one of a plurality of power lines and to generate at least one current signal indicative of the sensed current. The method also includes coupling a processing device to the current sensor such that the processing device receives the current signal. The method also includes configuring the processing device to determine which of the plurality of power lines is active based at least partially on the current signal and generate a motor speed control signal that directs the motor to operate at the motor speed that corresponds to the active power line. | 08-25-2011 |
20110227516 | DC brushless motor drive circuit with speed variable-voltage - For the present invention, under various running speeds statuses, the voltage supplied to the DC brushless motor is relatively increased or decreased on the basis of the internal setting of the motor drive control device according to the increased or decreased rotational output speed, so as to prevent the shortcoming of too much variation of the input impedance caused by the inductive reactance of the winding accordingly changed when the speed of the DC brushless motor is changed, specifically, to prevent the shortcoming of unable producing required torque resulting from the increased inductive reactance caused by increasing the rotational speed which makes the current value become too low when input by the original working voltage. | 09-22-2011 |
20110227517 | DC brushless motor drive circuit with current variable-voltage - For the present invention, under various running speeds statuses, the voltage supplied to the DC brushless motor is relatively increased or decreased on the basis of the internal setting of the motor drive control device with the increased or decreased load current, to prevent the shortcoming of too much change of the input impedance caused by the inductive reactance of the winding accordingly changed when the speed of the DC brushless motor is changed with the change of the load, specifically, to prevent the shortcoming of unable to produce required torque resulting from the increased inductive reactance of the winding caused by increasing the rotational speed which makes the current value become too low when input by the original working voltage. | 09-22-2011 |
20110234126 | METHOD AND APPARATUS TO MONITOR AN ELECTRIC MOTOR CONTROL CIRCUIT - An electric motor control circuit includes an electric energy storage device electrically connected via DC power buses to an inverter circuit that connects via an alternating current circuit to an electric machine. A capacitive shunt circuit connects between the power buses. Current flow through the capacitive shunt circuit to the chassis ground is monitored. A fault is identified when the current flow through the capacitive shunt circuit to the chassis ground exceeds a threshold. | 09-29-2011 |
20110234127 | CURRENT LIMITING DEVICE FOR VEHICLE - A current limiting device for vehicle includes a switching portion that passes/cuts off a current from an input terminal to an output terminal, a reflux portion that is connected to a connection point of the switching portion and the output terminal and supplies a current to a motor generator while the switching portion is cutting off the current, a current measurement portion that measures the current flowing from the output terminal to the motor generator, and a current control portion that controls the switching portion to switch ON/OFF according to a current value measured by the current measurement portion. When the motor generator is motor-driven using electric power of a condenser, the current control portion limits the current to the motor generator by controlling the switching portion to switch ON/OFF in a case where the measured current value is equal to or exceeds a predetermined current value. | 09-29-2011 |
20110234128 | POWER SUPPLY CIRCUIT AND MOTOR DEVICE - A power supply circuit has an input terminal for electrically connecting to an active wire of an AC power supply, an earth terminal for electrically connecting to a neutral or ground wire of the AC power supply, and a voltage decreasing unit. The voltage decreasing unit has an adjustable capacitor unit with adjustable capacitance for decreasing an AC voltage applied to the input terminal and an output terminal for outputting the decreased AC voltage. An electric motor is combined with the power supply circuit to form a motor device. | 09-29-2011 |
20110241580 | MOTOR DRIVE SYSTEM WITH BUS VOLTAGE CONTROL - A method for controlling a motor drive system, the system comprising an AC-DC converter coupled to a DC-AC inverter by a DC bus, a motor coupled to and driven by the inverter, and a load coupled to and driven by the motor is provided. The method includes accessing a motion profile for the motor and load and determining power losses of the converter, the inverter, the motor and the load. The method also includes controlling the voltage of the DC bus based upon the motion profile and the power losses to enhance the motor drive system efficiency, reliability and motor shaft performance. | 10-06-2011 |
20110241581 | VEHICLE HAVING A POWER SUPPLY DEVICE FOR AN ELECTRIC MOTOR AND METHOD FOR SUPPLYING POWER TO THE ELECTRIC MOTOR - A vehicle has a power supply device ( | 10-06-2011 |
20110254477 | BLOWER MOTOR FOR HVAC SYSTEMS - A blower motor assembly having a variable speed motor that is suitable for replacing a PSC motor in a residential HVAC (heating, ventilation, and air conditioning) system. The blower motor assembly includes a variable speed motor and motor controller; a first power input for receiving a plurality of AC power signals from a control device for use in determining an operating parameter for the motor; and a second power input for receiving AC power from an AC power source for powering the motor controller even when no AC power signals are received by the first power input. | 10-20-2011 |
20110254478 | Motor System and Method for Operating a Motor System - A method for operating a drive unit for an electric motor, wherein the drive unit has a drive circuit for driving the electric motor and an intermediate circuit, which is connected upstream of the drive circuit, in particular having an intermediate circuit capacitor. The method includes supplying an actuating variable for driving the electric motor. The method further includes adjusting a variable input voltage and supplying the adjusted input voltage to the drive unit via the intermediate circuit. In addition, the method includes operating the drive circuit as a function of an available intermediate circuit voltage, which is dependent on the adjusted input voltage, and as a function of the actuating variable in order to drive the electric motor in accordance with the actuating variable. | 10-20-2011 |
20110260662 | MOTOR DRIVING APPARATUS HAVING FUNCTION OF DYNAMICALLY SWITCHING CONVERTER OPERATION MODE OF AC/DC CONVERTER - A motor driving apparatus is provided that performs AC/DC conversion by suppressing harmonics of the input at the time of normal operation, while on the other hand, allowing system operation to continue in the event of an overload by avoiding system stoppage. The motor driving apparatus, which drives a motor by supplying power from an AC power supply, includes: an AC/DC converter having a converter operation mode which is switched between a PWM converter operation mode in which an AC input voltage is converted into a DC voltage by applying PWM control to a plurality of power switching devices connected in serial and parallel fashion and a diode rectifier operation mode in which an AC input voltage is converted into a DC voltage by using a plurality of diodes each connected in reverse parallel with an associated one of the plurality of power switching devices; and a converter control unit which dynamically switches the converter operation mode of the AC/DC converter according to a load during powering of the motor. | 10-27-2011 |
20110273118 | Power Factor Correction Circuit - A power factor correction circuit has a semiconductor integrated circuit and at least one very low Rds(on) MOSFET. The circuit also includes a silicon carbide diode for zero reverse recovery current. | 11-10-2011 |
20110304289 | Power Supply System and Method With Remote Variable Frequency Drive (VFD) - In at least some embodiments, a system includes a first remote tool. The system also includes a variable frequency drive (VFD) coupled to the first remote tool, wherein the output of the VFD powers the first tool and wherein at least part of the VFD is in situ with the first remote tool. | 12-15-2011 |
20110309778 | Power converting device with reduced switching loss - A power converting device is disclosed that can reduce switching loss occurring in a voltage source inverter that drives an AC motor. It is possible to supply DC power to the voltage source inverter from both a voltage source rectifier, which converts AC power from an AC generator into DC power, and a battery. A first switching circuit is inserted between the voltage source rectifier and the AC generator, and the battery is connected to the output side of the voltage source rectifier. A second switching circuit is inserted between the battery and the voltage source inverter. A third switching circuit and a reactor are inserted in series between the input side of the voltage source inverter and the input side of the voltage source rectifier. At least one of an upper arm and a lower arm of the voltage source rectifier can be chopper controlled. | 12-22-2011 |
20120019178 | POWER CONVERSION APPARATUS AND METHOD OF CONTROLLING CAPACITOR VOLTAGE OF POWER CONVERSION APPARATUS - A power conversion apparatus includes: a line breaker that is connected in series to a direct-current power supply; a first capacitor that is connected in parallel to the direct-current power supply through the line breaker; a discharge circuit that includes a resistor and a first switching circuit connected in series and is connected in parallel to the first capacitor; a power converter for driving a synchronous machine; a second capacitor that is connected in parallel to a direct-current side of the power converter; a second switching circuit that is connected in series between the first capacitor and the second capacitor; and a control circuit for controlling the discharge circuit. The control circuit controls the discharge circuit on the basis of the voltage of the first capacitor and the voltage of the second capacitor. | 01-26-2012 |
20120056567 | METHOD AND APPARATUS FOR CONTROLLING A HIGH-VOLTAGE BATTERY CONNECTION FOR HYBRID POWERTRAIN SYSTEM - A hybrid powertrain system has a high-voltage electric circuit including a high-voltage battery and a DC link coupled to first and second inverters electrically connected to first and second torque machines. A method for operating the hybrid powertrain system includes receiving a motor torque command for the second torque machine, determining a preferred DC link voltage for achieving the motor torque commanded from the second torque machine, selectively interrupting electric power flow between the high-voltage battery and the DC link to achieve the preferred DC link voltage. | 03-08-2012 |
20120056568 | MOTOR DRIVING APPARATUS HAVING DC LINK VOLTAGE REGULATING FUNCTION - A motor driving apparatus comprises: an AC/DC converter which converts AC voltage supplied from an AC power source into DC voltage through PWM switching control of a power switching device; and a DC/AC converter which converts the DC voltage into variable-frequency AC voltage for driving a motor in a controlled manner. The AC/DC converter includes: a control unit which generates, based on an error between the DC voltage and a DC voltage command value, a PWM signal for the PWM switching control of the power switching device; and a frequency/gain varying unit which sets the frequency of the PWM signal to be generated by the control unit and a control gain in the control unit higher than their normal levels during a period in which a load in the DC/AC converter varies. | 03-08-2012 |
20120081045 | CONTROL DEVICE FOR VOLTAGE CONVERSION DEVICE, VEHICLE INCORPORATING THE SAME, AND CONTROL METHOD FOR VOLTAGE CONVERSION DEVICE - In a voltage conversion device of a motor drive control device, switching-control is performed so as to enlarge an output allowable voltage range of the voltage conversion device restricted by a dead time in a switching operation for an upper arm and a lower arm performing power conversion by a switching operation. Accordingly, restriction in the output voltage from the voltage conversion device, caused by the dead time, can be suppressed. | 04-05-2012 |
20120091933 | CONTROL APPARATUS FOR POWER CONVERSION SYSTEM INCLUDING DC/AC CONVERTER CONNECTED BETWEEN ELECTRIC ROTATING MACHINE AND DC POWER SOURCE - A control apparatus is for use in a power conversion system including a DC/AC converter circuit connected to an electric rotating machine at output terminals thereof and to a DC power source at input terminals thereof through a switching means, a capacitor being connected across the input terminals of the DC/AC converter circuit. The control apparatus includes a current supply means configured to perform current supply control to supply a current to the electric rotating machine in order to discharge the capacitor by manipulating the DC/AC converter circuit in a state where the switching means is set open, and a speed lowering means configured to apply a brake force to a rotating shaft of the electric rotating machine to reduce a rotational speed of the electric rotating machine prior to the current supply control being performed by the current supply means if the rotational speed exceeds a specified speed. | 04-19-2012 |
20120104981 | DRIVING DEVICE OF BRUSHLESS DC MOTOR FOR FAN - A driving device is electrically connected with an AC power and a brushless DC motor for a fan. The driving device includes a rectifier unit, a filter unit, a switch power conversion unit and a control unit. The rectifier unit receives the AC power and rectifies the AC power. The filter unit, electrically connected with the rectifier unit, filters the rectified AC power and generates a DC power. The switch power conversion unit, electrically connected with the filter unit and the brushless DC motor, receives the DC power and outputs a driving power to the brushless DC motor. The control unit is electrically connected with the switch power conversion unit and the brushless DC motor. | 05-03-2012 |
20120112671 | POWER-CONSUMPTION CALCULATING METHOD OF MOTOR DRIVING DEVICE, AND CONTROL METHOD OF MOTOR DRIVING DEVICE USING THE POWER-CONSUMPTION CALCULATING METHOD - Accurate power consumption is calculated without raising cost, or making the device bigger. Power consumption (P) upon driving a motor is calculated from an input voltage (Vdc), a switching duty factor of a switching device (Sw | 05-10-2012 |
20120139462 | MOTOR ENERGY RECYCLING DEVICE - A motor energy recycling device is connected to a motor, a voltage regulating power capacitor, and a switch unit, for storing energy released by the motor. The motor energy recycling device include a switching device having first to third ends for being switched to connect the third end with the first end or second end; a first diode unit; a first capacitor connected to the motor and the first diode unit for using energy released by the motor to charge the first capacitor; a first inductor; a second capacitor; a second diode unit; and a second inductor connected between the second end and the second diode and between the voltage regulating power capacitor and the second capacitor for charging the voltage regulating power capacitor via the second inductor to accomplish an energy recycling. | 06-07-2012 |
20120161679 | Active High Voltage Bus Bleed Down - A method of actively discharging a common bus ( | 06-28-2012 |
20120212164 | SEMICONDUCTOR DEVICE AND DEVICE WITH USE OF IT - There is disclosed a semiconductor device capable of improving reliability, a rotating electrical machine using the semiconductor device or a vehicle using the semiconductor device. The semiconductor device includes Schottky barrier junctions and pn junctions. The pn junctions are provided in rectification areas and guard ring parts. Breakdown voltage at pn junctions in the rectification area is lower than breakdown voltage at the Schottky barrier junctions and the pn junctions in the guard ring parts. | 08-23-2012 |
20120217911 | INTERIOR PERMANENT MAGNET MACHINE SYSTEMS AND METHODS FOR CONTROLLING INTERIOR PERMANENT MAGNET MACHINES - Example embodiments disclose an Interior Permanent Magnet (IPM) machine system including an IPM machine including a nominal operating direct current (dc) bus voltage, and a controller configured to detect an operating dc bus voltage of the IPM machine and to control the IPM machine based on the nominal operating dc bus voltage and the detected operating dc bus voltage. | 08-30-2012 |
20120229059 | DRIVE WITH HEAT DISSIPATION AND ENERGY-SAVING FUNCTION - A drive with heat dissipation and energy-saving function for supplying power to drive a motor. The drive includes a driving circuit having a rectification section. The rectification section serves to receive AC current generated when the motor abruptly accelerates/decelerates and convert the AC current into DC current and output the DC current. The drive further includes a cooling module electrically connected to an output end of the rectification section. The cooling module is drivable by the DC current output from the rectification section to conduct out and dissipate heat. | 09-13-2012 |
20120229060 | VARIABLE COIL CONFIGURATION SYSTEM, APPARATUS AND METHOD - One or more variable configuration controller (VCC) systems may produce various combinations of series or parallel couplings of coils, winding or inductive elements of an electric machine such as a generator and/or electric motor. The VCC systems include a plurality of bridge rectifiers, and a first number of switches operated to selectively couple respective pairs of coils in series from parallel on an AC side of the bridge rectifiers. The bridge rectifiers provide for automatic electrical isolation of coils on occurrence of open circuit, low voltage or short circuit conditions. A second number of switches with different performance characteristics (e.g., speed, loss) than the first number of switches may be coupled in parallel with respective ones of the first number of switches. Power factor correction may be used. | 09-13-2012 |
20120229061 | VOLTAGE CONVERTER AND VOLTAGE CONVERTER SYSTEM INCLUDING VOLTAGE CONVERTER - A voltage converter includes a first circuit and a second circuit. The first circuit includes two or more reactors and at least one switching element. One terminal of each of the reactors is connected in parallel with respect to a power source. The at least one switching element is connected to the other terminal of each of the reactors. The second circuit includes at least one rectifier of which one terminal is connected to the electrical load. The second circuit shares with the first circuit the at least one switching element connected to the at least one rectifier. The first circuit is connected such that the power source charges the respective reactors when the at least one switching element is turned ON. The second circuit is connected such that the reactors discharge power to the electrical load when the at least one switching element is turned OFF. | 09-13-2012 |
20120242261 | MODULAR RECONFIGURABLE POLYPHASE POWER TRANSFORMER - An AC transformer having a cylindrical core configurable for single or polyphase power input and/or output transformer applications. The transformer core structure is capable of being configured to provide for single or polyphase inputs or outputs by varying the transformer primary and secondary winding configuratons. A polyphase input configuration can be utilized in polyphase output transformers, such as for variable frequency drive (VFD) applications. Additional methods for winding transformer cores minimize the quantity of core winding wire necessary for transformer manufacture. | 09-27-2012 |
20120242262 | CONTROL APPARATUS FOR ELECTRIC MOTOR - A control apparatus for an electric motor provided with a rotator having a permanent magnet and with a stator for generating a rotating magnetic field by an applied voltage and revolving the rotator includes: a rectangular wave inverter that applies a rectangular wave voltage onto the stator of the electric motor to drive the electric motor; a voltage converting section that raises or lowers an output voltage of a direct-current power supply and applies the voltage onto the rectangular wave inverter; an electrical angle acquiring section that acquires an electrical angle of the rotator of the electric motor; and an output voltage command generating section that generates a command for instructing the voltage converting section to output an electrical-angle synchronized voltage whose amplitude ripples in synchronization with a change of the electrical angle of the rotator acquired by the electrical angle acquiring section. In response to the command generated by the output voltage command generating section, the voltage converting section raises or lowers the output voltage of the direct-current power supply to a voltage indicated by the command and applies the voltage onto the rectangular wave inverter. This reduces a loss caused by a response delay of the electric motor. | 09-27-2012 |
20120249026 | DC ELECTRIC FAN AND DRIVING SYSTEM THEREOF - An embodiment of the invention provides a DC electric fan receiving a first direct current voltage. The DC electric fan includes a motor, a fan blade, a voltage converting device and a motor controller. The motor is driven by the first direct current voltage. The fan blade is connected to the motor and rotated by the driving of the motor. The voltage converting device receives and converts the first direct current voltages to a second direct current voltage, wherein the magnitude of the first direct current voltages is larger than the magnitude of the second direct current voltage. The motor controller receives the second direct current voltages to control the motor. | 10-04-2012 |
20120249027 | METHOD FOR STARTING AN ELECTRONIC DRIVE CIRCUIT OF AN ELECTRIC MOTOR AND CIRCUIT ARRANGEMENT THEREFOR - The invention relates to a method for starting an electronic drive circuit for the windings of an electric motor. A control unit, which is connected to a voltage source, is provided as well as a capacitor connected via a system switch element to the connecting terminals of the voltage source. The capacitor is connected across the input terminals parallel to the drive circuit. An operating circuit controls the system switch element. In order to start the motor, the operating circuit closes the system switch element and charges the capacitor and after the charging of the capacitor, opens the system switch element again. A test step is then started by the control unit, the drive circuit being supplied exclusively by the capacitor voltage (U | 10-04-2012 |
20120256571 | POWER SUPPLY DEVICE - A ripple current characteristic of a magnetic-coupling-type multi-phase converter includes a local minimum of the ripple current, with respect to a change of the duty ratio. In a region and another region, the ripple current is larger than a predetermined level. In the case where it is necessary to enhance the responsiveness of the multi-phase converter, a control circuit sets a voltage command value for the multi-phase converter, in accordance with the ripple current characteristic, so that the duty ratio is limited to a value that makes the ripple current larger than the predetermined level. | 10-11-2012 |
20120286708 | REVERSE RECOVERY CURRENT PREVENTION DEVICE AND MOTOR DRIVING APPARATUS - A reverse recovery current prevention device includes a full wave rectifier having a plurality of diodes, first and second diodes, a switch part and a switch control unit. The full wave rectifier rectifies a power source voltage from an alternating current power source inputted into first and second input terminals. The first and second diodes have anode terminals connected to the first and second input terminals, respectively. The switch part opens or shorts an electrical circuit between a negative-side output terminal of the full wave rectifier and each cathode terminal of the first and second diodes. The switch control unit prohibits the switch part from shorting the electrical circuit between the negative-side output terminal and each of the cathode terminals when a voltage between the negative-side output terminal and each of the cathode terminals is at or above a threshold. | 11-15-2012 |
20120306412 | VEHICLE ELECTRIC DRIVE AND POWER SYSTEMS - An automotive electric drive system may include an electric power source, an electric machine, and a DC-DC power converter electrically connected between the electric power source and the electric machine. The DC-DC power converter may include an inductor and a first switch each disposed in a different current path connecting the electric power source and the electric machine. The currents paths may be electrically in parallel. | 12-06-2012 |
20120306413 | MOTOR DRIVING DEVICE COMPRISING MAXIMUM OUTPUT CALCULATION UNIT OF DIRECT CURRENT CONVERSION UNIT - A motor driving device comprises: a single DC conversion unit that converts input AC into DC; a plurality of AC conversion units that convert DC output from the DC conversion unit into AC supplied to a plurality of motor units as driving electric power; an electric power consumption calculation unit of the DC conversion unit that calculates electric power consumption of the DC conversion unit from the input voltage and input current to the DC conversion unit every predetermined time period; and a maximum output calculation unit of the DC conversion unit that extracts a maximum value from the electric power consumption of the DC conversion unit calculated every predetermined time period and outputs it as a maximum output of the DC conversion unit. | 12-06-2012 |
20120313563 | System and method for supplementing a generated DC power supply - A renewable energy source is converted into a desired DC voltage that is delivered to a DC motor controller of a permanent magnet motor. A micro controller monitors the amount of supplied renewable DC having the desired DC voltage, which is delivered to each phase of the motor by turning on FET switches on demand. If the renewable DC available at a given instant is not adequate to power a particular phase of the motor, then the micro controller turns on backup FET switches that are part of an independent drive circuit that is in parallel with drive circuits of the renewable DC power circuit, to deliver to the motor line DC, which is produced from an AC supply that has gone through an AC to DC converter. Once charged, the renewable DC power will power the next available phase of the motor. | 12-13-2012 |
20120319630 | CONVERTER, MOTOR DRIVING MODULE, AND REFRIGERATING APPARATUS - The present invention offers a three-phase converter which conforms to the higher harmonics regulations. | 12-20-2012 |
20120326640 | ADAPTIVE FLUX CONTROL DRIVE - This disclosure relates to a variable speed drive for driving a motor having a starting circuit. The variable speed drive adaptively generates motor voltages to reduce the likelihood of starting circuit intrusions. | 12-27-2012 |
20120326641 | MOTOR DRIVE APPARATUS EQUIPPED WITH ENERGY STORAGE UNIT - A motor drive apparatus includes an AC/DC converter which converts AC power supplied from a power supply to DC power, a DC/AC converter which converts DC power to AC power and vice versa, a DC link unit which connects the DC side of the AC/DC converter to the DC side of the DC/AC converter and delivers the DC power from one to the other and vice versa, an energy storage unit which includes at least one capacitor storage unit and at least one flywheel storage unit each of which is connected to the DC link unit and stores or supplies the DC power, and an energy control unit which performs control so that the energy storage unit stores or supplies the DC power. | 12-27-2012 |
20130009576 | MOTOR CONTROLLER HAVING ENERGY STORAGE UNIT - A motor controller includes: a converter circuit for converting AC power to DC power; an inverter circuit connected to a DC side of the converter circuit and converting DC power to AC power for driving a motor or converting AC power regenerated from the motor to DC power; an energy storage unit connected to the DC side of the converter circuit and the inverter circuit and storing or outputting DC power; and a control unit controlling amount of DC power to be stored or output in/from the energy storage unit on the basis of a motor operation instruction instructing operation of the motor. | 01-10-2013 |
20130020972 | LOAD DRIVE APPARATUS - A load drive apparatus includes: a converter which has two switching elements connected in series and through which a DC voltage, outputted from a battery, is converted into a DC voltage of a different level; an inverter through which the DC voltage, outputted from the converter, is converted into an AC voltage and the AC voltage is applied to a rotary inductive load; and a capacitor provided between the converter and the inverter so as to be in parallel to the converter and the inverter. One of the two switching elements, which constitutes part of a power supply path extending from the battery to the rotary inductive load, is a normally-on type semiconductor element. Accordingly, the present invention can provide the load drive apparatus that allows power, generated by a regenerative operation of the rotary inductive load, to be stored in the battery in a simple configuration even in the event of failure of a controller or a converter. | 01-24-2013 |
20130026957 | BALANCED CONFIGURATION RELAY DEVICE WITH IMPROVED PERFORMANCES - A relay device includes: an electromagnet constituted by a metallic core and an electrical winding associated therewith; and a mobile anchor associated with a traction spring and suitable for oscillating around a respective axis of oscillation in response to the combined action of an electromagnetic attraction force, generated by the electromagnet and intended to attract the anchor towards the core, and an elastic recovery force, exerted by the spring and intended to move the anchor away from the core and make it return to an initial position, so as to open or close selectively via the anchor a contact or switch of an external electrical circuit, wherein the anchor has a balanced or equilibrium configuration in which its centre of gravity is arranged substantially along the axis of oscillation, and thereby the masses of various portions anchor portions are distributed in a balanced manner around the same axis of oscillation. | 01-31-2013 |
20130026958 | VARIABLE SPEED DRIVE - A converter module for a variable speed drive having a semiconductor device for precharge is described. The precharge circuit includes switching modules, one switching module with a first semiconductor switch connected in parallel or series with a second semiconductor switch. The second semiconductor switch is switched on and off during the precharge operation in order to limit the inrush current into the DC Link. After the precharge operation, the second semiconductor switch is turned on all the time and acts like a diode. The second semiconductor device may have a lower maximum current rating than the main semi-conductor devices. The lower current rated semiconductor device experience the same short circuit current as the higher current rated semiconductor device. The lower current rated semiconductor device can be supplied with a larger gate to emitter voltage than the higher current rated semiconductor device to equalize current between semiconductor devices. | 01-31-2013 |
20130043812 | POWER CONVERSION DEVICE - A power conversion device includes a first capacitor connected in parallel to a direct-current power supply, plural power converters that drive plural synchronous machines, a second capacitor connected in parallel to a direct-current side of power converters, a switching circuit inserted between the first and second capacitors, a switch-start instruction unit that controls starting of an operation of the power converters, and a control unit that controls the power converters based on a motor velocity and a voltage of the first capacitor. The switch-start instruction unit turns off the switching circuit while the power converters stop, turns off the switching circuit until a terminal voltage of each of the synchronous machines becomes equal to a predetermined value when each of the power converters starts operating, and turns on the switching circuit when the terminal voltage of each synchronous machine becomes equal to or smaller than the predetermined value. | 02-21-2013 |
20130043813 | Apparatus for Continued Operation of an Electric Motor During an Interruption in Input Power - An apparatus is provided for controlling operation of an electric motor through use of an additional power storage arrangement connected across the DC busses of a motor drive and controlling the speed of the motor. The additional power storage arrangement includes an additional capacitor arrangement and a rate limiting arrangement in a series circuit relationship with one another. | 02-21-2013 |
20130069569 | POWER FACTOR CORRECTION CIRCUIT, AND POWER SUPPLY DEVICE AND MOTOR DRIVING DEVICE HAVING THE SAME - There are provided a power factor correction circuit capable of transferring extra power to a ground before performing switching for a power factor correction to thereby reduce a switching loss generated in switching for a power factor correction, and a power supply device and a motor driving device having the same. The power factor correction circuit includes: a main switch switching input power to adjust a phase difference between a current and a voltage of the input power; and an auxiliary switch switched on before the main switch is switched on, to thereby form a transmission path for extra power of the main switch. | 03-21-2013 |
20130076280 | PHASE SHIFT TRANSFORMER IN MULTI-LEVEL MEDIUM VOLTAGE INVERTER - A phase shift transformer in a multi-level medium voltage inverter is disclosed, wherein structure is modularized to provide layout freedom and to reduce volume and weight of an entire system, and a continuous operation of a motor is enabled, even if one module is faulted. | 03-28-2013 |
20130106324 | MOTOR DRIVING APPARATUS | 05-02-2013 |
20130119901 | System for Managing DC Link Switching Harmonics - A distributed motor drive system includes a power management module and multiple inverter modules integrated with the motors and located on a machine or process remote from the power management module. The power management module distributes DC voltage and command signals to each of the inverters. The DC voltage is distributed between modules via a DC link cable. The integrated inverters execute switching routines to convert the DC voltage to an AC voltage suitable for controlling the motor. Each of the power management module and the inverters includes a portion of the DC bus capacitance. The distributed motor drive system also includes a link inductance between the power management module and the inverters to limit the amount of reactive current generated by the inverters. | 05-16-2013 |
20130119902 | System and Method for Managing DC Link Switching Harmonics - A distributed motor drive system includes a power management module and multiple inverter modules integrated with the motors and located on a machine or process remote from the power management module. The power management module distributes DC voltage and command signals to each of the inverters, where the DC voltage is distributed between modules via a DC link cable. The integrated inverters execute switching routines to convert the DC voltage to an AC voltage suitable for controlling the motor. Each of the power management module and the inverters includes a portion of the DC bus. The current on the DC link cable is monitored and general bus utilization as well as overload conditions are reported. | 05-16-2013 |
20130119903 | AC PRE-CHARGE CIRCUIT - AC pre-charging techniques are provided for pre-charging the DC bus on a motor drive. AC pre-charging techniques involve pre-charge circuitry including a manual switch, an automatic switch, and pre-charge control circuitry to switch the automatic switch between pre-charge and pre-charge bypass modes in response to an initialized pre-charge operation, input voltage sags, etc. In some embodiments, the pre-charge operation may be initialized by switching the manual switch closed. In some embodiments, the pre-charge operation may also be initialized by a detected voltage sag on the DC bus. The pre-charge circuitry may also be configured to disconnect a motor drive from the AC power supply under certain fault conditions. | 05-16-2013 |
20130134911 | MODULAR STACKED DC ARCHITECTURE TRACTION SYSTEM AND METHOD OF MAKING SAME - A modular stacked DC architecture for traction system includes a propulsion system includes an electric drive, a direct current (DC) link electrically coupled to the electric drive, and a first DC-DC converter coupled to the DC link. A first energy storage device (ESD) is electrically coupled to the first DC-DC converter, and a second DC-DC converter is coupled to the DC link and to the first DC-DC converter. The system also includes a second energy storage device electrically coupled to the second DC-DC converter and a controller coupled to the first and second DC-DC converters and configured to control a transfer of energy between the first ESD and the DC link via the first and second DC-DC converters. | 05-30-2013 |
20130147405 | CURRENT SENSOR RECONFIGURATION METHOD OF A VEHICLE HAVING A MOTOR - Disclosed is a method for setting a current sensor of a vehicle having a drive motor according to an exemplary embodiment of the present invention may include confirming a first condition that a vehicle stops its movement, confirming a second condition that a required torque of a drive motor of a vehicle is 0, stopping a current that is supplied to the drive motor if the first condition and the second condition are satisfied, and compensating offset of the current sensor of a drive motor control unit controlling the drive motor. The offset may be compensated if the first condition and the second condition are satisfied for a predetermined time. Accordingly, an offset of the current sensor is compensated in a predetermined driving condition that the vehicle stops moving and therefore the creep surge and the motor torque ripple that can be generated in the vehicle are prevented. | 06-13-2013 |
20130162183 | ELECTROLYTIC CAPACITOR REFORMATION SYSTEMS AND METHODS - An electrolytic capacitor reformation system for a vehicle includes an electrolytic capacitor, a motor driver module, a switching device, a resistor, and a switching control module. The electrolytic capacitor receives power from a battery of the vehicle. The motor driver module receives power from the electrolytic capacitor and drives an electric motor of the vehicle. The switching device and the resistor are connected in series in a current path between the battery and the electrolytic capacitor. The resistor limits current flow through the current path. The switching control module selectively transitions the switching device to a closed state to reform the electrolytic capacitor. | 06-27-2013 |
20130169204 | POWER SUPPLY UNIT FOR PRESS MACHINE - A power supply unit for a press machine having a converter (converter circuit) connected to a commercial AC power supply, and an inverter (inverter circuit) connected to a press motor, includes an electrical energy bank, an inrush prevention circuit, an inrush prevention instruction signal generation section, and a contactor switch section, wherein contactors of the inrush prevention circuit are switched from on ON state to an OFF state and inrush prevention resistors of the inrush prevention circuit are connected to AC phase current paths on condition that the inrush prevention instruction signal generation section has generated and output an inrush prevention instruction signal (Sres) during press operation. | 07-04-2013 |
20130181643 | POWER CONVERTER WITH ASYMMETRIC PHASE SHIFT AUTOTRANSFORMER FOR ALTERNATING CURRENT (AC) MOTOR - An AC-AC power converter supplies AC power to an AC motor having a plurality of motor windings and a case connected to a ground. The AC-AC power converter architecture includes an asymmetric phase shift autotransformer/rectifier unit (ATRU) that converts an AC input to a DC output, wherein the asymmetric phase shift ATRU generates a common-mode AC voltage across the asymmetric phase shift ATRU. The common mode voltage is diverted to ground through motor case parasitic capacitance via a common-mode voltage pull-down circuit connected between each phase of the ATRU AC input and the ground. | 07-18-2013 |
20130187580 | Controller For Back EMF Reducing Motor - Embodiments of controllers for electric motors, and methods of operation for the same are disclosed. More particularly, the controllers and methods of operation are for motors designed to operate so as to reduce Back EMF. | 07-25-2013 |
20130193883 | MOTOR DEVICE - A motor device may include a motor unit and a converter unit. The motor unit may include a brushless DC motor, an inverter circuit, and an inverter drive circuit. The inverter circuit may supply a drive current to the brushless DC motor. The inverter drive circuit may supply a drive pulse signal to the inverter circuit. The converter unit may be connected to the motor unit. The converter unit may include an AD/DC converter and a microcomputer. The AC/DC converter may convert an AC voltage to a DC voltage to be supplied to the motor unit. The microcomputer may receive a digital control signal and may output an analog control signal. The inverter drive circuit may receive the analog control signal outputted from the microcomputer and may output a drive pulse signal to be supplied to the inverter circuit. | 08-01-2013 |
20130234632 | IN-VEHICLE POWER SUPPLY SYSTEM WITH MULTIPLE VOLTAGE-REDUCING DEVICES - An in-vehicle power supply system includes a DC power source, a steering power converter, a steering drive control unit, a plurality of voltage-reducing devices, and a voltage-reducing control unit. The steering power converter converts electric power supplied from the DC power source, and provides the electric power converted to a steering assist motor. The steering drive control unit is supplied with electric power from the DC power source, and controls the steering power converter. The voltage-reducing devices are coupled in parallel to each other between the DC power source and the steering power converter. Each of the voltage-reducing devices reduces a power source voltage of the DC power source and generates a reduced voltage when being operated. The voltage-reducing control unit determines operation state or non-operation state of each of the voltage-reducing devices such that at least one of the voltage-reducing devices is in operation at a time. | 09-12-2013 |
20130241451 | APPARATUS AND METHOD FOR ENERGY EFFICIENT MOTOR DRIVE STANDBY OPERATION - Motor drive apparatus and methods are presented in which a standby controller uses at least one switching device to power an inverter in a normal mode and to remove power from the inverter and other motor drive components during a standby mode for improved energy efficiency. | 09-19-2013 |
20130249451 | VOLTAGE CONVERSION CONTROL DEVICE FOR MOTOR - Disclosed is a control device which performs voltage conversion control for a voltage conversion circuit between motor control circuits which control a plurality of motors and a power supply. The control device includes sampling means for sampling a DC voltage after voltage conversion, target voltage setting means for setting target voltages of the plurality of motors, selection means for selecting a target voltage to be converted by the voltage conversion circuit from among the plurality of target voltages, generation means for generating a sampling timing on the basis of a carrier signal of one of the motors having the unselected target voltage, and control means for performing voltage conversion control using the DC voltage sampled by the sampling means in response to the sampling timing for each sampling timing request of voltage conversion control. | 09-26-2013 |
20130278190 | Method for Adjusting a DC Voltage Intermediate-Circuit Voltage - A method is disclosed for adjusting a voltage of a DC-voltage intermediate circuit in a battery system having a battery and a drive system. The battery is configured to output one selectable output voltage from n+1 different output voltages. In a first step of the method, an actual value of the voltage of the DC-voltage intermediate circuit is determined, and is then compared with the various output voltages of the battery. A first selected output voltage of the battery, which is the highest voltage of those output voltages of the battery which are less than the actual value of the voltage of the DC-voltage intermediate circuit, and a second selected output voltage of the battery, which is the lowest voltage of those output voltages of the battery which are higher than the actual value of the voltage of the DC-voltage intermediate circuit, are then selected. | 10-24-2013 |
20130307450 | Electrical Control System - An electrical control system having a direct current to direct current regulator receiving a direct current supply input, wherein the regulator outputs a controlled voltage direct current inverter power feed. Included is an inverter in electrical communication with the regulator and receives the controlled voltage direct current inverter power feed, the inverter outputs an alternating current motor power feed to a permanent magnet brushless direct current motor that outputs a shaft rotational speed and a back electromotive force. Also, a control is provided for regulating the controlled voltage direct current inverter power feed based upon criteria utilizing the back electromotive force or an auxiliary motor stator wire loop signal in conjunction with an optional voltage look-up table to substantially make the controlled voltage result in a reduction of a pulse width modulation switching frequency to further smooth and reduce harmonic of the alternating current waveform to increase motor efficiency. | 11-21-2013 |
20130342137 | CONTROL APPARATUS IN MOTOR DRIVE SYSTEM AND METHOD OF CONTROLLING MOTOR DRIVE SYSTEM - A control apparatus in a motor drive system includes a magnet temperature acquiring device and a step-up ratio determining device. The magnet temperature acquiring device is configured to estimate or detect a temperature of a permanent magnet provided in a rotor or a stator of a motor of the motor drive system. The motor drive system includes a power supplying device to output direct current voltage, and a voltage step-up device to increase, at a certain step-up ratio, the direct current voltage which is output from the power supplying device. The step-up ratio determining device is configured to determine the certain step-up ratio in accordance with the temperature of the permanent magnet estimated or detected by the magnet temperature acquiring device. | 12-26-2013 |
20130342138 | Power Supply System, Comprising a Converter Connected to a Network and a Transformer Connected in Parallel Relative to the Converter to Limit the Homopolar Current, and a Drive Chain Comprising Such a Power Supply System - The power supply system for supplying electrical power to a load is capable of delivering an output voltage to the load from an input voltage coming from an electric power network. | 12-26-2013 |
20130342139 | POWER CONVERTING DEVICE, MOTOR DRIVING DEVICE, AND REFRIGERATING AND AIR-CONDITIONING APPARATUS - A power converting device includes a rectifying circuit that rectifies voltage of an alternating-current power supply; smoothing means that smoothes output voltage from the rectifying circuit; short-circuiting means that is disposed more closely to the alternating-current power supply than the smoothing means and that short-circuits the alternating-current power supply and controls at least one of electric current and voltage; a reactor that is disposed more closely to the alternating-current power supply than the short-circuiting means; one or more backflow preventing elements that prevent electric current from flowing backward from a load side toward the alternating-current power supply; commutating means for performing a commutation operation for causing electric current to flow toward a different path that is connected in parallel with the one or more backflow preventing elements; malfunction detecting means for detecting a malfunction of the commutating means; and switching control means that performs operation control of the commutating means in accordance with detection by the malfunction detecting means. | 12-26-2013 |
20140001988 | ELECTRIC MOTOR VEHICLE | 01-02-2014 |
20140028225 | BOOST CONVERTER CONTROL APPARATUS - A boost converter control apparatus for controlling a motor drive system which is provided with a boost converter disposed between an electric power converter and a direct current power supply, the boost converter boosting a direct current voltage of the direct current power supply and supplying it to the electric power converter, is provided with: an operating device provided with a proportional element, an integral element and a derivative element, the derivative element being configured as a bandpass filter, the operating device calculating a PID controlled variable corresponding to an electric current command value of the boost converter for maintaining an output voltage of the boost converter at a command value of an inter-terminal voltage VH of a smoothing condenser; and a controlling device which is configured to control the output voltage of the boost converter on the basis of the calculated PID controlled variable. | 01-30-2014 |
20140035492 | SINGLE PHASE OPERATION OF A THREE-PHASE DRIVE SYSTEM - Single-phase voltage operation techniques are provided for a three-phase drive system. A drive system may include a rectifier configured to couple to a three-phase AC voltage source. The rectifier may be configured to convert AC voltage from the three-phase AC voltage source to a direct current (DC) voltage. The drive system may also include a controller configured to send a plurality of switching signals to a plurality of switches in the rectifier such that the plurality of switching signals minimizes a current provided to the rectifier when only a single-phase of the three-phase AC voltage source is available. | 02-06-2014 |
20140042939 | MOTOR VOLTAGE CONVERSION CONTROL DEVICE - A control device performs voltage conversion control on a voltage conversion circuit between a power supply and motor control circuits which control a plurality of motors. The control device includes sampling units for sampling a DC voltage after voltage conversion, target voltage setting units for setting target voltages VH | 02-13-2014 |
20140049197 | CONTROL APPARATUS FOR AC MOTOR - A control apparatus for an AC motor that drives and controls the AC motor includes a damping control unit that calculates a damping manipulated variable that suppresses a fluctuation in the capacitor voltage, wherein the damping control unit calculates a fluctuation rate of the capacitor voltage, calculates the damping manipulated variable based on the fluctuation rate and a predetermined value that is set as a value in a predetermined range around a maximum torque of the AC motor, generates a torque command or a current command of the AC motor based on the damping manipulated variable, and controls an inverter so as to change a current flowing in the inverter in a fluctuation suppressing direction with respect to a fluctuation in the capacitor voltage based on the torque command or the current command. | 02-20-2014 |
20140062354 | REGENERATIVE INVERTER DEVICE AND INVERTER DEVICE USING POWER CELL UNIT - An inverter device may include a converter unit configured to receive single phase AC power to output DC power; a capacitor unit configured to absorb the DC power; an inverter unit configured to synthesize the absorbed DC power to output the drive power of a load; and a converter controller configured to control the converter unit based on the AC power and the output DC power of the converter unit, wherein the converter controller includes a converter gate signal generator configured to control a plurality of gates contained in the converter unit; and an input line harmonic voltage generator configured to output converter additional power having a predetermined multiple of the frequency of the fundamental frequency component of the AC power with the same size as that of the fundamental frequency component of the AC power to an adder connected to the input side of the converter gate signal generator. | 03-06-2014 |
20140139156 | MOTOR DRIVE APPARATUS AND VEHICLE INCLUDING THE SAME, AND METHOD FOR CONTROLLING MOTOR DRIVE APPARATUS - An ECU sets target value of a system voltage based on an electric power loss of a motor generator and an inverter and controls a voltage boost converter. The ECU calculates the target value of the system voltage using a function expression generated, for each operating point of the motor generator, by approximating a loss characteristic which represents change of the electric power loss with respect to change of the system voltage, by a quadratic expression or a linear expression of the system voltage. | 05-22-2014 |
20140152208 | POWER FACTOR CORRECTION DEVICE, POWER SUPPLY, AND MOTOR DRIVER - There is provided a power factor correction device including, a first switch switching input power to adjust a phase difference between a current and a voltage of the input power, a second switch switched on before the first switch is switched on to form a transfer path for residual power in the first switch, a first inductor charging and discharging energy according to switching of the first switch, and a second inductor adjusting an amount of current flowing through the second switch according to switching of the second switch, wherein the first inductor and the second inductor are inductively coupled. | 06-05-2014 |
20140152209 | POWER FACTOR CORRECTION WITH VARIABLE BUS VOLTAGE - A controller includes a voltage determination module, a bus voltage command module, and a power factor correction (PFC) control module. The voltage determination module determines a desired direct current (DC) bus voltage for a DC bus electrically connected between a PFC module and an inverter power module that drives a motor. The voltage determination module determines the desired DC bus voltage based on at least one of torque of the motor and speed of the motor. The bus voltage command module determines a commanded bus voltage based on the desired DC bus voltage. The PFC control module controls the PFC module to create a voltage on the DC bus that is based on the commanded bus voltage. | 06-05-2014 |
20140152210 | ARRANGEMENT AND METHOD FOR A VEHICLE INVERTER DRIVE - A method and arrangement are disclosed for a vehicle inverter drive having a voltage distribution block and two or more inverters, intermediate circuits of which are connected in parallel to the voltage distribution block for supplying voltage to the intermediate circuits, in which the intermediate circuits of the inverters are interconnected with a coaxial cable to minimize inductance in the parallel connection. | 06-05-2014 |
20140159622 | CONTROL SYSTEM FOR AC MOTOR - A converter controls a system voltage, which is a DC link voltage of an inverter, in accordance with a voltage command value. The inverter outputs a rectangular wave voltage having the system voltage as amplitude to an AC motor during application of rectangular wave voltage control. During application of rectangular wave voltage control, a voltage command value for the system voltage is modified such that a current phase on a d-q plane of the AC motor is brought closer to a target current phase line. The target current phase line is set on an advance side relative to an optimal current phase line which is a set of current phases at which output torque is maximized for the same amplitude of a motor current in the AC motor. | 06-12-2014 |
20140167660 | INVERTER DEVICE - In the inverter device that receives DC power from the DC common bus and drives a load, the configuration is such that the switching element is arranged on the first current path in which current flows through the positive-side DC terminal during powering, the reverse-connected diode is arranged on the second current path in which current flows through the positive-side DC terminal during regeneration, the charging resistor is arranged on the third current path in which current flows through the positive-side DC terminal when the smoothing capacitor of the smoothing unit is initially charged, and the brake resistor is connected externally between the positive-side DC terminals such that the positive-side DC terminal becomes an end whose potential is the same as that of the positive-side bus of the DC common bus. | 06-19-2014 |
20140167661 | POWER CONVERSION SYSTEM - This disclosure relates to a power conversion system to power a variable impedance load with a variable power source, the power conversion system comprising a power converter including input terminals adapted to receive variable power from the variable power source and output terminals providing a converted power to the variable impedance load based on the variable power received at the input terminals. The power converter increases the input voltage to an output voltage. The power converter is configured to reflect a source impedance of the variable power source to the variable impedance load. | 06-19-2014 |
20140176029 | VEHICLE AND CONTROL DEVICE FOR VEHICLE - On a vehicle, a converter converting and outputting a voltage, an inverter converting DC power output from the converter to AC power, and a motor driven by AC power supplied from the inverter are mounted. A control device for this vehicle controls the inverter in a control mode selected in accordance with a degree of modulation of the inverter, selects a target control mode of the inverter, and varies an output voltage from the converter such that a degree of modulation of the inverter varies until the control mode switches to the target control mode when a current control mode is different from the target control mode. | 06-26-2014 |
20140210389 | MOTOR CONTROL DEVICE INCLUDING ELECTRIC STORAGE DEVICE AND RESISTANCE DISCHARGE DEVICE - A motor control device includes a rectifier, an inverter connected to the rectifier via the DC link, a power failure detecting unit detecting power failure, a voltage detecting unit detecting a DC voltage at the DC link, an electric storage unit storing DC power, a charging unit that can make charging by boosting to a voltage higher than the DC voltage, a discharging unit discharging DC power, a resistance discharge device that performs resistance discharging of DC power at the DC link when the DC voltage after power failure is equal to or higher than a predetermined start level and that does not perform resistance discharging when the DC voltage is equal to or lower than a predetermined stop level, and a discharging operation determining unit operating the discharging unit when the DC voltage at the DC link after power failure is equal to or lower than a predetermined threshold. | 07-31-2014 |
20140265955 | Autotransformer System Reducing Total Harmonic Distortion - There is disclosed an apparatus and method to reduce total harmonic distortion input into a 24-pulse autotransformer system and the autotransformer system itself. The 24-pulse autotransformer system is configured to receive an input of a first voltage and produce an output voltage of a second voltage. The system includes a pair of autotransformers coupled to an AC power source. One winding of each phase of the first autotransformer has a turn ratio to effect a decrease in the voltage across said winding over a symmetric voltage value and a second winding of each phase of the first autotransformer has a turn ratio to effect a decrease in the voltage across said winding over a symmetric voltage value, thereby reducing total harmonic distortion (THD) in the input current to the system without a zero sequence blocking transformer. | 09-18-2014 |
20140285126 | METHOD AND CONTROL CIRCUIT FOR CONTROLLING A BRUSHLESS ELECTRIC MOTOR - The invention refers to a method for controlling a brushless, electronically commutated electric motor, a main AC voltage being rectified into an intermediate circuit direct voltage and this direct voltage being fed by an intermediate circuit containing an intermediate circuit capacitor to an inverter which is controlled by a motor control means for feeding and commutating the electric motor whereby the intermediate circuit direct voltage is monitored in respect of its voltage level and is compared with a predetermined limiting value and, on reaching or exceeding the limiting value, the intermediate circuit direct voltage is limited to the predetermined limiting value by clocked disconnection and reconnection. | 09-25-2014 |
20140354199 | Active Voltage Controller for an Electric Motor - A method for controlling an electric motor. A desired speed is identified for the electric motor during operation of the electric motor. A voltage is identified to cause the electric motor to turn at the desired speed. The voltage is applied to the electric motor and actively controlled during operation of the electric motor. | 12-04-2014 |
20150048767 | INVERTER DEVICE - An inverter device includes a rectifier circuit that rectifies alternating-current power supplied from a main power supply and generates direct-current power, a control power supply circuit that generates direct-current power for control using at least one of the generated direct-current power and direct-current power supplied from an external power supply, and a control unit that receives the generated direct-current power for control and performs a predetermined control operation. The control power supply circuit includes an insulation transformer including a primary side and second side winding wires, a first control power supply capacitor connected to the secondary side winding wire via a first diode, an external power supply capacitor connected to the first control power supply capacitor via a second diode and connected to a terminal, to which the external power supply is connected, via a third diode, and a second control power supply capacitor connected to the external power supply capacitor. | 02-19-2015 |
20150054434 | METHOD FOR DISCHARGING AT LEAST ONE CAPACITOR OF AN ELECTRIC CIRCUIT - The invention relates to a method for discharging at least one capacitor ( | 02-26-2015 |
20150061552 | MOTOR DRIVING DEVICE - A motor driving device includes a microcomputer, a command voltage adjusting circuit, and a driving IC. The command voltage adjusting circuit converts a first command voltage signal from the microcomputer to a second command voltage signal. The driving IC generates a drive pulse based on the second command voltage signal. An upper and a lower limit of an input voltage range of the driving IC are larger than an upper and a lower limit of a voltage range of the first command voltage signal, respectively. | 03-05-2015 |
20150097501 | ELECTRIC VEHICLE POWER CONVERSION SYSTEM - An electric vehicle power conversion system may include an exclusive discharge circuit for discharging stored charges of a smoothing condenser. The electric vehicle power conversion system may also include a discharge controller for driving a DC/DC converter if a control circuit for controlling the electric vehicle power conversion system detects a fault of an exclusive discharge circuit, such that the stored charges of the smoothing condenser may be supplied to auxiliary devices or a DC auxiliary power supply and be discharged therethrough. | 04-09-2015 |
20150108929 | POWER CONTROLLER - A power controller includes a boost converter, an inverter, and a control unit controlling the output voltage of the boost converter and the carrier frequency of the inverter. The control unit includes a carrier frequency reducing program which reduces the carrier frequency to an LC resonance upper limit frequency while maintaining a set value of the output voltage of the boost converter at a system loss minimization voltage at the time of reduction of the carrier frequency from the set frequency, and a voltage varying program which changes the carrier frequency to a first varied frequency calculated based on a first predetermined temperature or lower and the temperatures of the respective switching elements, and changes the set value of the output voltage of the boost converter to a voltage at which the LC resonance upper limit frequency becomes the first varied frequency. | 04-23-2015 |
20150145446 | MOTOR DRIVE DEVICE - A motor drive device includes a constant voltage power supply and a motor drive control unit. The constant voltage power supply includes an AC/DC converter, a zero-cross detector, a switching control unit and a switching regulator. The AC/DC converter converts an AC voltage supplied from an AC voltage source into a DC voltage. The zero-cross detector detects a zero-cross point of the AC voltage, and outputs a zero-cross detection signal. The switching control unit outputs a switching control signal based on the zero-cross detection signal. The switching regulator has a switching element. The motor drive control unit outputs a motor drive signal for driving a motor to the inverter. The AC/DC converter has a rectifier circuit and a smoothing capacitor. The switching regulator performs switching on a first DC voltage in accordance with the switching control signal at a timing corresponding to the zero-cross point. | 05-28-2015 |
20150303838 | POWER SOURCE DEVICE - A power source device includes a power source body including first and second secondary batteries and an inverter. When the power source connection status is switched from parallel to serial statuses, the motor generator is operated as a motor and the power source connection status is switched to a single second power source status, after switching to the first connection status in which the power source body and the first inverter are connected, the first motor generator operates as a motor, and power source connection status is switched to a single second power source status, and the inverter connection status is switched to a second connection status in which the power source body in the single second power source status and the inverter are connected | 10-22-2015 |
20150311802 | MOTOR DRIVE SWITCHED MODE POWER SUPPLY SYSTEMS AND METHODS - The embodiments described herein include one embodiment that provides a motor drive that includes driver circuitry that controls operation of an inverter in the motor drive to output power to a motor, control circuitry that controls operation of the driver circuitry, and a switched mode power supply that supplies electrical power to the driver circuitry, the control circuitry, or both. The switched mode power supply includes a primary coil, in which a primary controller stores electrical energy in the primary coil by selectively connecting the primary coil to a power source, and a secondary coil electrically isolated from the primary coil, in which the secondary coil outputs electrical power based at least in part on the electrical energy stored in the primary coil, in which a secondary controller controls the electrical power supplied to the driver circuitry, the control circuitry, or both by selectively connecting the secondary coil to a power output of the switched mode power supply. | 10-29-2015 |
20150326152 | ELECTRIC MOTOR CONTROLLER AND METHODS OF DETERMINING INPUT POWER LINE ENERGIZATION - An electric motor controller and methods of determining which input power line of a plurality of input power lines of a motor drive controller has been energized are provided. An electric motor controller configured to be coupled to an electric motor includes a plurality of power input lines configured to receive an alternating current (AC) input voltage from an AC power source, an energized line detection device configured to sense that a power input line has been energized by the AC power source, and configured to output an isolated signal, and a rectifier configured to convert the AC input voltage having a frequency to a direct current (DC) voltage. The controller also includes a computing device coupled downstream from the energized line detection device and configured to determine which input power line has been energized. | 11-12-2015 |
20150349679 | HYBRID-VEHICLE VARIABLE-VOLTAGE TRACTION MOTOR DRIVE - A method is provided for controlling a traction motor for an electrified vehicle, wherein the motor is driven by a pulse-width modulated inverter. A drive command from a driver of the vehicle is converted into a demanded torque. A substantially fixed DC link voltage is maintained from a DC power source. An input voltage for supplying to the inverter is calculated that causes the motor to deliver the demanded torque at a transition point between a constant-torque region and a field-weakening region of torque production. The voltage from the DC link is converted to the determined input voltage at an input to the inverter. By lowering the voltage applied to the inverter, switching losses and harmonic losses are reduced. | 12-03-2015 |
20150349696 | MAIN FIELD VOLTAGE LIMITER IN BRUSHLESS SYNCHRONOUS MACHINES - A brushless synchronous machine with a limiter for main field voltage and a method of limiting main field voltage in a brushless synchronous machine are described. The machine includes a regulator to use a field current to excite main field windings and generate the main field voltage. The machine also includes a limiter to limit the field current to maintain the main field voltage corresponding to the field current below a limit based on a transfer function. | 12-03-2015 |
20150357946 | FULLY INTEGRATED MEDIUM VOLTAGE INPUT LOW VOLTAGE OUTPUT VARIABLE FREQUENCY DRIVE SYSTEM - A motor drive system includes a step down phase shifting isolation transformer structured to receive medium voltage AC power from an AC bus and convert the medium voltage AC power to tow voltage AC power, a converter structured to receive the low voltage AC power and convert the low voltage AC power to DC power and output the DC power to a DC bus, and a tow voltage inverter structured to receive the DC power from the DC bus and convert the DC power to a second low voltage AC power. | 12-10-2015 |
20150365023 | MOTOR INTERFACE CONTROLLER HAVING AN INTEGRATED POWER SUPPLY - A motor assembly broadly includes a motor, a motor controller, and an interface controller having an integrated power supply. The integrated power supply includes an AC to DC power conversion and voltage reduction component. The motor controller and the interface controller receive line voltage electrical power without the need for an external transformer. | 12-17-2015 |
20150365034 | POWER FACTOR CORRECTION WITH VARIABLE BUS VOLTAGE - A controller includes a voltage determination module, a bus voltage command module, and a power factor correction (PFC) control module. The voltage determination module determines a desired direct current (DC) bus voltage for a DC bus electrically connected between a PFC module and an inverter power module that drives a motor. The voltage determination module determines the desired DC bus voltage based on at least one of torque of the motor and speed of the motor. The bus voltage command module determines a commanded bus voltage based on the desired DC bus voltage. The PFC control module controls the PFC module to create a voltage on the DC bus that is based on the commanded bus voltage. | 12-17-2015 |
20150365037 | ALTERNATING CURRENT MOTOR DRIVE SYSTEM - An alternating current (AC) motor drive system is provided in which electric power can be supplied between a direct current (DC) bus and an electric power storage device, using a voltage value across a DC bus, without providing means that measures an amount of current flowing through the DC bus. In the AC motor drive system of the invention, according to a voltage value measured by DC voltage value detection means and a charge/discharge current amount measured by charge/discharge current amount detection means, a charge/discharge circuit causes an electric power storage device to discharge an amount of electric power, from among amounts of electric power supplied from an inverter to an AC motor, that exceeds a first electric power threshold value, or the circuit causes the electric storage device to store an amount of electric power, from among amounts of AC motor regenerative electric power regenerated via the inverter, that exceeds a second electric power threshold value. | 12-17-2015 |
20150381086 | FAN MOTOR POWER SUPPLY - A fan having one fan blade; a fan motor for rotating the fan blade; a motor control electrically coupled with the fan motor for controlling operational characteristics of the fan motor; and a power supply having a step-down high efficiency buck converter, a step-down low drop-out linear regulator, and/or a step-down switching regulator are described. The power supply may receive a first input voltage and lower the first input voltage to a second lower voltage. The fan motor is electrically coupled to be driven by the first input voltage and the motor control is electrically coupled to operate using the second lower voltage from the power supply. The motor control may include a microcontroller, level shifters electrically coupled to the microcontroller, and drivers electrically coupled to the level shifters and configured to drive the fan motor. | 12-31-2015 |
20160049889 | SYSTEM TO INCREASE THE IN-LINE POWER FACTOR OF A THREE-PHASE BRUSHLESS DC MOTOR - The present invention relates to a control system and a method for raising the mains-side power factor A of three-phase fed EC motors having a dc voltage intermediate circuit ( | 02-18-2016 |
20160049895 | PWM RECTIFIER FOR MOTOR DRIVE CONNECTED TO ELECTRIC STORAGE DEVICE - A PWM rectifier includes a main circuit unit which performs a power conversion on the basis of a PWM control signal, a DC voltage loop control unit which generates a current command, a current command restriction unit which sets, when an absolute value of the current command exceeds a limit value, the limit value as a final current command, and otherwise sets the current command as the final current command, a DC voltage loop saturation determination unit which determines a saturation state when the final current command is set to the limit value and otherwise determines as a non-saturation state, a DC voltage command calculation unit which changes the DC voltage command into a value obtained by adding an offset to a minimum or maximum value of the DC voltage value, and a PWM control signal generation unit which generates the PWM control signal from the final current command. | 02-18-2016 |
20160079845 | DC POWER-SUPPLY DEVICE AND REFRIGERATION-CYCLE APPLICATION DEVICE INCLUDING THE SAME - A DC power-supply device that suppresses an increase of a harmonic current and deterioration of a power factor without causing any imbalance among respective phase currents, in a configuration in which a three-phase alternating current is converted into a direct current and supplied to a load. The DC power-supply device includes a rectifier circuit, a reactor connected to an input side or an output side of the rectifier circuit, a first capacitor and a second capacitor serially connected between output terminals to a load, and a charging unit. During a cycle combining a charging period and a non-charging period of a pair of the first capacitor and the second capacitor, the charging unit is controlled so that a charging frequency becomes 3n times (n is a natural number) the frequency of the three-phase alternating current. | 03-17-2016 |
20160079888 | SYSTEM AND METHOD FOR CONTROLLING A MOTOR - An interleaved bridgeless power factor correction (PFC) converter-based motor drive system is provided. The system includes a first inductor coupled to a second inductor. The coupled first and second inductors are coupled to a first input configured to be coupled to a first line of an alternating current (AC) power supply. The system also includes a third inductor coupled to a fourth inductor. The coupled third and fourth inductors are coupled to a second input configured to be coupled to a second line of the AC power supply. The system further includes a digital active power factor correction (PFC) controller configured to cause current in at least one of the coupled first and second inductors and the coupled third and fourth inductors to be interleaved. | 03-17-2016 |
20160079889 | MOTOR DRIVER AND A METHOD OF OPERATING THEREOF - A driver circuit for driving an electrical motor coil is provided which comprises combined switched inductance boost voltage converter circuitry and switched inductance buck voltage converter circuitry. An input node of the driver circuit is provided to be coupled with the electrical motor coil, which provides the inductive element of both the boost and buck circuitry. Further the boost and buck circuitry share a storage capacitor, which provides the capacitive element of each circuitry, and a voltage developed across the storage capacitor by the boost circuitry forms an input of the switched inductance buck voltage converter circuitry. Bidirectional driving of the electrical motor coil is thus provided from a driver circuit which only need be supplied with a single unidirectional supply and the current drawn from that supply is significantly reduced because of the manner in which the boost and buck circuitry operate synergistically to recycle electrical power which is moved back and forth between the electrical motor coil and the storage capacitor. A corresponding driver board, electrical motor driver apparatus, method of operating a driver circuit and apparatus are also provided. | 03-17-2016 |
20160087547 | POWER CONVERSION DEVICE, MOTOR DRIVE CONTROL DEVICE EQUIPPED WITH POWER CONVERSION DEVICE, COMPRESSOR AND BLOWER EQUIPPED WITH MOTOR DRIVE CONTROL DEVICE, AND AIR CONDITIONER EQUIPPED WITH COMPRESSOR OR BLOWER - A power conversion device is configured to have reactors and is configured to have chopper circuit units, connected in series, that chop the output of a rectifier configured to rectify an AC voltage from an AC power supply. The power conversion device includes: an AC switch disposed on a side closer to the AC power supply than the chopper circuit units; an AC reactor that is connected in parallel to the AC switch; and a switching control unit that stops the switching of the switching elements when the contact of the AC switch is open. | 03-24-2016 |
20160099664 | MOTOR CONTROL APPARATUS HAVING FUNCTION OF DISCHARGING ENERGY REMAINING IN DC LINK - A motor control apparatus includes a PWM rectifier which converts AC power on a three-phase AC input power supply side into DC power or which converts DC power on a DC output side into AC power, a smoothing capacitor which is connected to a DC link on the DC output side of the PWM rectifier, a DC voltage detection unit which detects a DC voltage of the smoothing capacitor, an LCL filter which is connected to the AC input power supply side of the PWM rectifier, a power disconnection unit which is connected to an AC power supply side of the LCL filter, and a control unit which applies, when power is disconnected by the power disconnection unit, electric current to the LCL filter by controlling the PWM rectifier, and lowers the DC voltage to a desired value by discharging energy stored in the smoothing capacitor. | 04-07-2016 |
20160118924 | MOTOR DRIVING APPARATUS - A motor driving apparatus includes a boosting section, a drive voltage output section, a detecting section, a storage section and a determining section. The boosting section generates a post-boosting voltage by boosting an input voltage. The drive voltage output section generates a drive voltage to drive a motor using the post-boosting voltage. The detecting section detects a value of the input voltage or a variation width relative to a reference value of the input voltage as variation power source variation information when there is power source variation. The storage section stores target value association information associating the power source variation information and a boosting target value of the post-boosting voltage. The determining section determines the boosting target value based on the power source variation information and target value association information. The target value association information is determined based on a range of operations of the drive voltage output section. | 04-28-2016 |
20160134211 | VENTILATEUR COMPORTANT UN DISPOSITIF DE TRANSFORMATION D'UN COURANT ELECTRIQUE TRIPHASE - A fan, characterized in that the conversion device ( | 05-12-2016 |
20160141981 | MOTOR CONTROLLER HAVING A POWER-SAVING CONTROL, AND A MOTOR CONTROL SYSTEM INCLUDING THE MOTOR CONTROLLER - A motor controller that is configured to switch power supply phases of the motor, to perform a limit-position abutment control by rotating the motor to a movable limit of a movable range of the rotation object to learn a reference position of the motor, perform a power-saving return control afterwards, in which a power supply to the motor is stopped, thereby returning a rotation position of the motor toward a target rotation position, and stop the rotation of the motor by simultaneously supplying power to a preset phase of the motor, when the rotation position of the motor reaches the target rotation position. In such manner, the power consumption as well as the heat generation of the motor are reduced for returning the rotation position of the motor to a preset rotation position after the abutment control of the motor. | 05-19-2016 |
20160152146 | ELECTRIC DRIVE HAVING AN ACTIVELY CONTROLLED DC BUS | 06-02-2016 |
20160156289 | DRIVING APPARATUS FOR AN ELECTRIC MOTOR, A METHOD FOR ACTUATION THEREOF AND A MOTOR UNIT WHICH COMPRISES THE DRIVING APPARATUS | 06-02-2016 |
20160164440 | SOLAR ENERGY UTILIZATION SYSTEM - A solar energy utilization system includes a solar panel, a motor driven by an inverter circuit functioning as a motor drive circuit with power output by the solar panel, a solar output voltage monitor functioning as a monitor that monitors an input or an output of the solar panel and also functioning as a monitor that monitors an input or an output of the inverter circuit, and a controller. The controller has a control mode in which the inverter circuit is controlled such that an output voltage of the solar panel is maintained at a voltage higher than a maximum power point voltage. In this control mode, the controller performs the control such that a rotation speed of the motor is changed repeatedly at predetermined timings. | 06-09-2016 |
20160380563 | POWER CONVERSION CONTROL APPARATUS - In a power conversion control apparatus incorporated in a power conversion system for converting a direct current (DC) voltage output from a converter into an alternating current (AC) using an inverter. The power conversion control apparatus includes a converter drive circuit configured to drive the converter, an inverter drive circuit, and a control electronic control unit (ECU). The inverter drive circuit operates a plurality of switching elements forming the inverter at a variably set switching speed. The control ECU outputs to the converter drive circuit an input voltage change command for changing an input voltage command for an input voltage to be output from the converter and input to the inverter. The control ECU outputs to the inverter drive circuit a drive command for driving the plurality of switching elements and a switching speed change command for changing the switching speed for the plurality of switching elements. | 12-29-2016 |