| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 318473000 | In or about the motor being controlled | 57 |
| 20080211444 | Control Apparatus for Transmission Mechanism, Transmission, Vehicle Provided Therewith, Method of Controlling the Transmission Mechanism, and Method of Estimating Heat Value of Electric Motor in the Transmission Mechanism - A motorcycle has a transmission including a transmission mechanism and an electronic control unit (ECU). The transmission mechanism includes a crankshaft as an input shaft, a driven shaft as an output shaft and an electric motor. The electric motor changes continuously the transmission ratio between the crankshaft and the driven shaft. The ECU estimates the heat value of the motor from a rate of change in the transmission ratio. When the estimate heat value reaches or exceeds a specified value the electric motor is restricted or stopped. | 09-04-2008 |
| 20090066283 | METHOD AND SYSTEM FOR LIMITING THE OPERATING TEMPERATURE OF AN ELECTRIC MOTOR - A method and system for limiting the operating temperature of an electric motor is provided. A maximum operational temperature of the motor is determined. A current operational temperature within the motor is sensed. A maximum allowable power dissipation of the motor is calculated based at least in part on the maximum operational temperature and the current operational temperature of the motor. A torque command for the motor is generated based on the maximum allowable power dissipation. | 03-12-2009 |
| 20090066284 | Laundry treatment machine and method of controlling the same - There are provided a laundry treatment machine and a method of controlling the same. A temperature around a motor is sensed and the range of current input to the motor in accordance with the sensed temperature is limited in stages. Therefore, the surrounding of the motor can be prevented from being overheated. In addition, since the range of the current input to the motor is limited in stages, when the current applied to the motor is limited, abnormal noise is not generated and the torque of the motor can be maximized. | 03-12-2009 |
| 20090096402 | MOTOR DRIVE DEVICE AND COOLING DEVICE USING THE SAME - A drive circuit of a fan motor is provided. In an embodiment of the drive circuit, a first PWM comparator compares a temperature detection voltage with a cyclic voltage, and outputs a first PWM signal. A second PWM comparator compares a minimum frequency setting voltage indicating a minimum frequency of the fan motor, with the cyclic voltage, and outputs a second PWM signal. The drive circuit combines the first PWM signal and the second PWM signal by a logical operation, to drive the fan motor. The drive circuit includes a first logic gate which generates a logical sum of the first PWM signal and the second PWM signal, and a second logic gate which generates a logical product of the first PWM signal and an inverted signal of the second PWM signal. The drive circuit switches drive mode based on the first logic gate and the second logic gate. | 04-16-2009 |
| 20090184673 | MOTOR DRIVING SYSTEM AND METHOD OF PROTECTING MOTOR DRIVER - A motor driver system includes an excess current sensing device configured to compensate a sensing value depending on a temperature of a motor, and to output the compensated sensing value, the sensing value being obtained from a current value associated with the motor; and a controller configured to stop the motor when the compensated sensing value exceeds a preset excess value. | 07-23-2009 |
| 20090284202 | Motor Control Device, Control Method, and Control Program - The temperature of a stator coil is measured by a temperature sensor ( | 11-19-2009 |
| 20090322272 | MOTOR CONTROL DEVICE - A motor control device includes a motor, a control portion controlling the motor, estimating a heating temperature of the motor on the basis of an electric current value and an energizing time period or a stopping time period of the motor, and restricting an electrification of the motor in a case where the estimated heating temperature becomes equal to or greater than a limit value, and a temperature sensing device for detecting a temperature of a predetermined portion of a vehicle, wherein the control portion estimates an initial temperature of the motor when an engine is started on the basis of a temperature signal outputted from the temperature sensing device and determines the limit value on the basis of the estimated initial temperature. | 12-31-2009 |
| 20100141195 | MOTOR CONTROL METHOD FOR MDPS SYSTEM - A motor control method for an MDPS system makes it possible to provide smoother and easier steering operation at a low cost by improving the OHP performance while supplying appropriate controlling electric current to a motor, without changing the motor or a decelerator used in an MDPS system. | 06-10-2010 |
| 20100176759 | Control Valve Coil Temperature Controller - A method of actuator coil temperature control for actuators that are not continuously operated, wherein when an actuation current is not being applied to the actuator coil, a) sensing a parameter indicative of the resistance of the actuator coil as an indication of the temperature of the actuator coil, b) if the sensed parameter indicates the temperature of the actuator coil is below a first predetermined limit, then initiating a series of successive actuation current pulses to the actuator coil, each actuation current pulse being terminated before actuation of the actuator occurs, and c) periodically repeating a) and b). | 07-15-2010 |
| 20100207563 | Sealed Electric Compressor - A sealed electric compressor having a normally-off type pressure switch and a fuse element. The pressure switch is placed in a sealed housing, connected parallel to a main winding of an electric motor, and, when the pressure of refrigerant in the sealed housing is abnormally high, activates to short-circuit the main winding. The fuse element is connected in series to the main winding and an auxiliary winding of the electric motor and interrupts conduction of electricity to the electric motor when an excess current that is produced when the pressure switch short-circuits the main winding flows. | 08-19-2010 |
| 20100225264 | BATTERY COOLING SYSTEM FOR VEHICLE - A system for cooling a battery mounted on a vehicle using air within a vehicle, independently of the travelling state of the vehicle. The air within a vehicle compartment is guided to a battery mounted on a vehicle to cool the battery. A controller determines a basic fan speed v of the cooling fan based on a battery temperature and an ambient temperature. Further, the controller calculates an increment Δv of the fan speed in accordance with the vehicle speed and the degree of window opening and determines a final fan speed V according to V=v+Δv, to drive the cooling fan. By controlling the fan speed to increase, it is possible to cool the battery even when the base pressure of the inlet-side static pressure of the cooling fan becomes negative pressure compared to when the windows are closed. | 09-09-2010 |
| 20100231155 | CONTROLLER UNIT WITH INTEGRATED TEMPERATURE SENSOR - The present invention relates to a controller unit adapted to be releaseably attached to a corresponding terminal arranged on an exterior surface portion of a motor-driven compressor. The controller unit according to the present invention comprises an electrically isolating carrier member having one or more electrically conductive paths arranged thereon for transporting electrical power signals, the carrier member further having at least one thermally conductive path arranged thereon for transporting heat to a heat sensitive element of the controller unit in order to determine the temperature of the motor of the compressor. The present invention further relates to a method for carrying out the present invention. | 09-16-2010 |
| 20110001445 | LOW-PIN COUNT FAN SPEED CONTROL SYSTEM AND A METHOD THEREOF - A low-pin count fan speed control system and a method thereof include primarily an activation unit to drive a fan to operate. When the fan starts completely, the fan slows down to a pre-determined rotation speed through an idle speed regulation unit. After achieving a pre-determined temperature through a temperature transition unit, the fan speed beings to increase from the idle speed. When the fan is operating, the rotation speed is properly increased in proportion to the temperature, using a positive temperature regulation slope unit. Therefore, through this method, the rotation speed will not be decreased by foreign objects when the fan is operating and a computer host can be provided with proper heat dissipation. | 01-06-2011 |
| 20110057594 | METHODS AND SYSTEMS FOR DETERMINING AND DISPLAYING A TIME TO OVERLOAD OF MACHINE TOOLS - Systems and methods for determining and displaying a time to overload of a motor in a computer numerical controlled (CNC) machine tool are provided. A method includes monitoring a fuse level of a motor in a CNC machine tool and calculating a time to overload of the motor based on the fuse level. The method further includes displaying the time to overload on a user interface based on the fuse level of the motor and a load acting on the motor. | 03-10-2011 |
| 20110057595 | Method of Controlling a Motor - Embodiments of the invention provide methods of controlling a motor, such as a servo motor. One method can include monitoring a current temperature of the motor and a power stage of the motor substantially continuously and substantially in real-time. This method can include determining optimum settings for a first time interval to remove power and the second time interval to provide power in order to deliver maximum output while remaining below the maximum rated temperature of the motor. One method can include pulsing power to the motor for a second time interval after a first time interval has elapsed and tailoring pulse shapes of the power provided to the motor for the second time interval. One method can include calculating a maximum phase current based on the rotor shaft torque for each real-time speed of the motor that correlates to the maximum allowable current draw from the power supply. | 03-10-2011 |
| 20110095716 | MOTOR DRIVER FOR MACHINE TOOL WITH FAN MOTOR - A motor driver for a machine tool, which comprises a fan motor, configured to drive a cooling fan for cooling a radiator or the interior of the motor driver, estimates a rate of heat release within a heating element or the motor driver, based on information obtained from a motor current detector used for motor control or from an input current detector of the motor driver, and adjusts a fan motor power supply voltage to control a rotational speed of the fan motor in accordance with the estimated heat release value. | 04-28-2011 |
| 20110095717 | METHOD OF AND APPARATUS FOR CONTROLLING OIL TEMPERATURE INCREASE FOR ELECTRIC VEHICLE AND ELECTRIC VEHICLE - An electric vehicle employs an oil commonly used as a lubricating oil for gears and a coolant for a motor and is propelled by transmitting the rotational torque of the motor to wheels through the gears, the motor being partly immersed in the oil. It is determined whether the motor is in a state prior to being started or not. If it is judged that the motor is in the state prior to being started, coils of the motor are energized alternately with a first current supplied to the motor at an advanced angle for no torque to generate a magnetic flux, and a second current supplied to the motor at another advanced angle for no torque to generate a magnetic flux in a direction opposite to the magnetic flux generated by the first current, thereby heating the oil. | 04-28-2011 |
| 20110101904 | Overheat Protection Apparatus - An apparatus which estimates the temperatures of a motor without using a temperature sensor can achieve overheat protection by proper control. In an example, a heat generation amount calculation section calculates a heat generation amount of a motor. A current upper limit map has a current upper limit value corresponding to a temperature estimated value and a ratio map has a ratio corresponding to the temperature estimated value. A lower one of limited current values, determined using the two maps, controls energization of the motor. The heat generation amount calculation section includes a heat generation correction term, and a heat radiation correction term for calculating a function of the difference between the integrated value of the heat generation amount and a motor ambient temperature. If the ambient temperature becomes equal to or higher than a comparison temperature, then the heat generation amount is calculated without the heat radiation correction present. | 05-05-2011 |
| 20110169439 | MINIMUM TEMPERATURE CONTROL FOR ELECTROMECHANICAL ACTUATOR - A component intended for use in very low temperature situations has an electromechanical actuator with a control for an electric motor. The control receives a temperature signal indicative of a temperature being experienced by the electromechanical actuator. The control is operable to produce a current signal sent to the electric motor which will generate heat without significant torque. A method of operating the electromechanical actuator is also disclosed. | 07-14-2011 |
| 20110285339 | Heat removal from motor components - An electrical machine having a rotor component configured to rotate with respect to a stator component includes a sensing arrangement to sense electrical, magnetic, and/or mechanical machine parameters during machine operation. The electrical machine also includes a fluid sprayer coupled to a cooling controller. The cooling controller activates the fluid sprayer to spray cooling fluid on a portion of the electrical machine in response to in response to the sensed electrical, magnetic, and/or mechanical machine parameters. | 11-24-2011 |
| 20120001579 | MOTOR CONTROL APPARATUS, IMAGE FORMING APPARATUS AND MOTOR CONTROL METHOD - According to one embodiment, a motor control apparatus includes a timer to measure a period in which a job is not executed, a sensor to detect a temperature of a physical object, an acquisition part to acquire time information measured by the timer and temperature information detected by the sensor, and a drive control part that determines a current value of a motor provided in the physical object based on the time information and the temperature information acquired by the acquisition part, and controls the motor current value by applying a voltage level corresponding to the determined current value to a drive element of the motor. | 01-05-2012 |
| 20120007532 | Rotor Temperature Estimation and Motor Control Torque Limiting for Vector-Controlled AC Induction Motors - A system and method including a runtime thermal model that estimates individual component temperatures, permitting the system to only limit power when necessary or desirable. A power-limiting system for a vector-controlled AC induction motor includes a torque command system for generating a torque command; a thermal protection system determining a runtime estimate for a temperature of a component of a rotational electro-magnetic component of the vector-controlled AC induction motor; and a controller configured to generate a motor control signal for the vector-controlled AC induction motor responsive to the torque command, wherein the thermal protection system determines the runtime estimate responsive to a multi-node thermal model of the vector-controlled AC induction motor, and wherein the controller limits a power of the vector-controlled AC induction motor to maintain a component temperature below its critical temperature. | 01-12-2012 |
| 20120019183 | DRIVE CONTROL SYSTEM - A rotary breaker that interrupts a transmission of a driving force from a motor to a drive mechanism unit is provided between the motor having a permanent magnet incorporated therein and the drive mechanism unit of an electric vehicle. A second controller controls the rotary breaker based on operation states of a power converting unit that has a power converter that drives the motor by converting a direct-current voltage or an alternate-current voltage into an alternate-current voltage with an arbitrary frequency and a first controller that controls the power converter, operation states of the motor and the rotary breaker, and an operation state of the second controller itself. | 01-26-2012 |
| 20120133313 | System And Method For Estimating A Generator Rotor Temperature In An Electric Drive Machine - An electric drive machine includes an electric drive system including an internal combustion engine and an electrical power generator coupled to the internal combustion engine. An electronic controller is in control communication with the electric drive system and is configured to determine an estimated temperature of a rotor of the electrical power generator at least in part by determining a rotor temperature rise estimation, compare the estimated rotor temperature to a rotor temperature threshold, and initiate an excessive temperature action if the estimated rotor temperature is greater than or equal to the rotor temperature threshold. | 05-31-2012 |
| 20120133314 | VEHICLE SYSTEM FOR CONTROLLING MOTOR TORQUE - A vehicle having a vehicle system is provided with a motor having a housing and a stator. The motor is configured to provide motor torque for vehicle propulsion. The vehicle system is also provided with at least one controller that is configured to receive input indicative of at least one of the housing temperature and the stator temperature, and control the motor torque based on a comparison of the input to predetermined thermal data. | 05-31-2012 |
| 20120146563 | ARRANGEMENT HAVING AN ELECTRIC MACHINE AND METHOD FOR OPERATING AN ELECTRIC MACHINE - The invention relates to a method and arrangement having an electric machine, comprising a stator ( | 06-14-2012 |
| 20120194118 | Methods and Systems Involving Electric Machine Controllers - A method for operating a controller includes receiving a first accumulated thermal value of an electrical machine and an associated first time stamp from a memory, initializing a processor of the controller with the first accumulated thermal value and the associated first time stamp, determining whether a second time stamp has been received, calculating a difference between the second time stamp and the first time stamp responsive to determining that the second time stamp has been received, calculating a second accumulated thermal value as a function of the first accumulated thermal value, the first time stamp, and the second time stamp, and updating the first accumulated thermal value with the second accumulated thermal value. | 08-02-2012 |
| 20120274256 | COOLED MOTOR - A motor having a first portion configured to turn in a forward direction, a second portion coaxially mirrors the first portion; and a central fan between the first and second portions, and forcing air through the portions. A thermoelectric cooler element, thermally coupled to the portion is configured to cool the motor. A motor controller is electrically coupled to the first and second portions, and operates a portion in response to a condition sensed by the motor controller. The condition sensed by the motor controller is a motor torque, a motor speed, a motor casing temperature, or a zoned motor casing temperature. A method includes detecting a motor operational command; selecting a motor operational state using motor portion responsive to the motor command; sensing a heating state of a motor portion; and providing a cooling state to the motor portion responsive to the heating state. | 11-01-2012 |
| 20120274257 | Motor Control System - A motor control system has a sensor for measuring an operational parameter of a motor and includes means for converting the measured operational parameter into an electrical resistance value. The operational parameter measured by the sensor is the rotational speed of the motor which is converted into a back electro-motive force value. The back electro-motive force value is then used, along with a measured input voltage value and measured motor current value to calculate the electrical resistance as value. The electrical resistance value is then compared to a threshold value and in the case that the threshold value is reached, the current flow in to the motor is adjusted. | 11-01-2012 |
| 20120293102 | METHOD AND SYSTEM FOR HEATING OF ROBOTS IN COLD ENVIRONMENTS - A method and system are disclosed for heating of robots in cold environments, whereby the robot possesses permanent magnet brushless or three-phase synchronous motors with three motor phases including three stator coils (L | 11-22-2012 |
| 20120299520 | PREDICTIVE THERMAL PROTECTION FOR MOTORS IN BARRIER OPERATOR SYSTEMS - Disclosed are alternate embodiments of various components of a barrier operator system. and methods of operation, including of the mechanical drive subsystem with segmented and self-locking rail unit, rail mounting supports, belt and chain drive tensioning, and drive assembly carriage and interface; the electronics and software routines for controlled operation of the various barrier operator functions; wall console communications with the barrier operator; encryption and decryption of access codes; establishment and monitoring of travel limits and barrier speed and force profiles; thermal protection of barrier operator drive motors; and establishment and control of communications from the barrier operator to accessories by way of a wireless adapter. | 11-29-2012 |
| 20120326650 | ROTATING ELECTRICAL MACHINE CONTROL APPARATUS - A rotating electrical machine control apparatus includes a plurality of rotating electrical machine controllers and a target voltage setting device. Each of the rotating electrical machine controllers includes a rotating electrical machine and a power supply controller configured to perform power supply control on the rotating electrical machine. The rotating electrical machine controllers have different imposed loads. The target voltage setting device is configured to set DC-side voltages of the rotating electrical machine controllers to a target voltage defined as a thermal equilibrium voltage which represents the DC-side voltages obtained when the rotating electrical machine controllers are in a thermal equilibrium condition. | 12-27-2012 |
| 20130069579 | MOTOR WINDING OVERHEAT PREVENTION APPARATUS AND MOTOR CONTROL APPARATUS - A winding overheat prevention apparatus comprises: a stator winding temperature calculation unit which calculates winding temperature based on the ambient temperature of the motor and on the amount of change in the estimated temperature of a stator winding; a position sensor temperature detection unit which detects the temperature indicated by a temperature sensing element in a position sensor a rotor; and an alarm signal output unit which outputs an alarm signal when the winding temperature exceeds an alarm level, wherein when the ambient temperature is not higher than a prescribed temperature, the alarm level is set equal to a temperature preset based on the ambient temperature and the maximum value of the amount of the temperature change, while when the ambient temperature is higher than the prescribed temperature, the alarm level is set equal to a temperature preset in order to protect the position sensor from overheating. | 03-21-2013 |
| 20130193893 | METHOD OF CONTROLLING A FAN - A method of controlling a fan in a vehicle comprising: measuring a control input signal; measuring a continuous applied voltage to the fan; comparing the continuous applied voltage to a look up table; and activating the fan when the control input signal is open and the continuous applied voltage is greater than a system voltage by about 0.5 volts. | 08-01-2013 |
| 20130285587 | ELECTRIC POWER STEERING CONTROL DEVICE - A electric power steering control device equipped with a motor having a resolver detection unit comprises: an ambient temperature detecting means ( | 10-31-2013 |
| 20140009095 | CONTROL OF A BRUSHLESS MOTOR - A method of controlling a brushless motor that includes sensing a temperature and using the sensed temperature to define a current limit. A lower current limit is then defined for a lower sensed temperature. A winding of the motor is sequentially energised and de-energised, with the winding being de-energised when current in the winding exceeds the defined current limit. | 01-09-2014 |
| 20140084834 | Electronic Control Device - Disclosed is an electronic control device for controlling an electric actuator, which includes: a housing fixed to an outer side of an exterior part of the electric actuator; a circuit board accommodated in an inner space of the housing; a temperature sensor mounted on the circuit board; and a heat transfer part having a thermally conductive relay member extending from the circuit board in a direction toward the exterior part to define a continuous heat transfer path from the temperature sensor to an inner side of the exterior part such that heat of the inner side of the exterior part can be transferred to the temperature sensor through the heat transfer path. | 03-27-2014 |
| 20140117909 | DRIVING MOTOR FOR ELECTRIC VEHICLES AND CONTROL METHOD OF THE SAME - A driving motor for an electric vehicle includes a rotor having a field coil wound thereon and a stator having an armature coil wound thereon. The driving motor includes a motor control unit to perform temperature based control between the stator and the rotor based on which one has a higher temperature than the other, in order reduce a current value to the one having the higher temperature than the other. | 05-01-2014 |
| 20140125268 | METHOD AND DEVICE FOR OPERATING AN ELECTRICAL MACHINE HAVING SEPARATE EXCITATION - A method and a device for operating an electrical machine having separate excitation, especially a synchronous machine. With the aid of a sensor system, a variable characterizing a rotor temperature and/or a stator temperature are/is determined, and an excitation current and stator currents for the electrical machine are specified by a control unit as a function of the variable characterizing the rotor temperature and/or the stator temperature, at least in specifiable operating ranges. | 05-08-2014 |
| 20140191696 | ROTATING ELECTRIC MACHINE AND METHOD FOR CONTROLLING THE ROTATING ELECTRIC MACHINE - A rotary electric machine includes a rotor that is arranged such that an axis of rotation of the rotor extends in a horizontal direction, a stator that is provided with an coil end on which coolant is supplied from a position above the coil end in a direction of gravitational force, and a temperature sensor that is arranged on an outer peripheral face of the coil end at a position near a horizontal plane that includes the axis of rotation of the rotor. When the flow rate of the coolant is below a threshold the temperature sensor measures the coil temperature. When the flow rate of the coolant is above a threshold, so that coolant is in direct contact with the temperature sensor, it measures the coolant temperature. | 07-10-2014 |
| 20140197769 | OVER TEMPERATURE PROTECTION DEVICE FOR ELECTRIC MOTORS - An over temperature protection device for electric motors applicable to a railway vehicle driving system that operates a plurality of electric motors in parallel using one or a plurality of inverter devices includes a control device configured to control the operation of an inverter device and a protecting device configured to detect, on the basis of a frequency fs including frequency information at the time when the inverter device is applying control for fixing a ratio of a voltage and a frequency to electric motors and electric currents of at least one phase flowing to the electronic motors, an over temperature that could occur in the electric motors, to generate an over temperature protection signal Tf for protecting the electric motors from the over temperature, and to output the over temperature protection signal Tf to the control device. | 07-17-2014 |
| 20140203748 | MOTOR CONTROL DEVICE AND MOTOR CONTROL METHOD - There is provided a motor control device for an actuator having a motor, including a measuring unit configured to measure a temperature of the actuator or a temperature corresponding to the temperature of the actuator, a determining unit configured to determine whether the temperature measured by the measuring unit is lower than a preset temperature, and a boost control unit configured to perform boost control at activation of the motor to increase drive power supplied to the motor if the determining unit determines that the temperature measured by the measuring unit is lower than the preset temperature. The boost control unit is configured to perform the boost control such that, only within a boost period after starting activation of the motor, drive power larger than that supplied to the motor during steady driving after the boost period is supplied to the motor. | 07-24-2014 |
| 20140210392 | METHOD AND APPARATUS FOR CONTROLLING AN ELECTRIC MOTOR EMPLOYED TO POWER A FLUIDIC PUMP - An electric motor powers a fluidic pump fluidly connected to a hydraulic circuit. Operating the electric motor includes determining a heat transfer coefficient for the electric motor based upon a temperature of hydraulic fluid in the hydraulic circuit. A temperature of the electric motor is determined based upon the heat transfer coefficient. Operation of the electric motor is controlled based upon the temperature of the electric motor. | 07-31-2014 |
| 20140265977 | HYBRID INDUSTRIAL VEHICLE - A hybrid industrial vehicle ( | 09-18-2014 |
| 20140265978 | MOTOR CONTROL DEVICES AND METHODS - A system and method for preventing thermal damage to an electric motor in a vehicle includes arrangements for monitoring the motor and detecting a cycle of the motor. If the cycle occurred within a predetermined increment time, a cycle count is incremented. If no cycle occurs for a predetermined decrement time, the cycle count is decremented if the cycle count is greater than zero. If the cycle count is at least equal to a cycle limit, power operation of the motor is deactivated for at least the decrement time. The method may include continuously calculating energy consumed by the motor and, if the energy consumed exceeds one or more allowable energy thresholds, setting the cycle count equal to the cycle limit. The method may further include detecting a failure condition and setting the cycle count equal to the cycle limit when the failure condition is detected. | 09-18-2014 |
| 20140340016 | POWER SUPPLY COMPENSATION FOR AN ACTUATOR - A mechanism for compensating power to a motor or actuator. Compensation may counter the effects of changing voltage levels of power to the motor and varying temperatures at the motor. An output of a wave generator may be input to a comparator along with a level of voltage representing the temperatures and voltage levels. An output may be a power signal for driving the motor at a constant speed and/or torque which can increase a maintenance-free lifetime of the motor and actuator. | 11-20-2014 |
| 20140354204 | CONTROL DEVICE AND CONTROL METHOD FOR PERMANENT MAGNET MOTOR - A control device for a permanent magnet motor, including: a rotor position detector configured to detect a rotating speed of a rotor of a permanent magnet motor in a state in which the permanent magnet motor is disconnected from a load by a clutch and rotates without power supply; a magnet temperature estimator configured to estimate a magnet temperature of the permanent magnet motor based on the detected rotating speed; a current compensator configured to determine a compensation amount for compensating for a current command to the permanent magnet motor based on the estimated magnet temperature; and a drive control device configured to control a power converter for driving the permanent magnet motor based on the compensation amount. | 12-04-2014 |
| 20150022133 | Circuit for Thermal Protection and Power Regulation of Electric Motors - A circuit for thermal protection and power regulation as a function of the current winding temperature of phase windings of an electric motor. The circuit including at least one temperature monitor switch (TW | 01-22-2015 |
| 20150102756 | CONTROLLER AND CONTROL METHOD FOR MACHINE TOOL CAPABLE OF CHANGING MOTION DEPENDING ON MOTOR TEMPERATURE - A controller and a method for a machine tool, capable of discriminating the factors in overheating, and taking appropriate measures depending on each factor. A first amplifier of the controller has an acceleration/deceleration judging part which judges as to whether the spindle motor is accelerated or decelerated; a first temperature estimating part which estimates a first amount of change in temperature of the spindle motor when the spindle motor is in the acceleration/deceleration state; a second temperature estimating part which estimates a second amount of change in temperature of the spindle motor when the spindle motor is in the steady state; a comparing part which compares the first and second estimated values. A numerical controlling part of the controller transmits an operation command for changing the operation of at least one of the spindle motor and a feed shaft motor, when the spindle motor is overheated. | 04-16-2015 |
| 20150303860 | Motor, Control Device, and Motor Drive Device - In order to provide a motor capable of detecting a temperature of a magnet | 10-22-2015 |
| 20160036370 | MOTOR DRIVING APPARATUS, MOTOR SYSTEM, AND CORRECTION CIRCUIT THEREOF - The motor driving apparatus according to an exemplary embodiment in the present disclosure may include: a controlling unit outputting a digital code; a converting unit converting the digital code into an analog driving signal; and a correction unit changing the analog driving signal at a predetermined ratio using a plurality of resistors. | 02-04-2016 |
| 20160065112 | MAGNET MANAGEMENT IN ELECTRIC MACHINES - A magnet management method of controlling a ferrite-type permanent magnet electrical machine includes receiving and/or estimating the temperature permanent magnets; determining if that temperature is below a predetermined temperature; and if so, then: selectively heating the magnets in order to prevent demagnetization and/or derating the machine. A similar method provides for controlling magnetization level by analyzing flux or magnetization level. Controllers that employ various methods are disclosed. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims. | 03-03-2016 |
| 20160134224 | CLEANING AND MOTOR HEATING ELECTROMAGNETIC MOTOR CONTROL SWITCHING - One embodiment describes a switching device system, which includes a first single pole switching device that selectively connects and disconnects a first phase of electric power to a first winding of a three phase motor; a second single switching device that selectively connects and disconnects a second phase of electric power to a second winding of the three phase motor; in which the first and second single pole switching devices control temperature of the motor by, at a first time, connecting the first phase and the second phase electric power to the motor. | 05-12-2016 |
| 20160134225 | MOTOR CONTROL DEVICE - A coil temperature estimation unit | 05-12-2016 |
| 20160141999 | SYSTEM AND METHOD FOR ESTIMATING TEMPERATURE OF DRIVE MOTOR - A system for estimating a temperature of a drive motor may include: a drive motor that generates driving torque; a detector that detects a d-axis voltage, a q-axis voltage, a d-axis current, and a q-axis current of the drive motor; and a controller that determines whether zero-current control of the drive motor is performed from the d-axis current and the q-axis current detected by the detector, calculates a no-load counter-electromotive force of the drive motor from the d-axis voltage and the q-axis voltage detected by the detector, converts the no-load counter-electromotive force into a counter-electromotive force with respect to a reference rotation speed, calculates a temperature variation of the drive motor from the counter-electromotive force with respect to the reference rotation speed and a reference counter-electromotive force, and estimates the temperature of the drive motor. | 05-19-2016 |
| 20170237384 | MOTOR CONTROLLER, MOTOR CONTROL METHOD, AND NON-TRANSITORY COMPUTER-READABLE MEDIUM ENCODED WITH MOTOR CONTROL PROGRAM | 08-17-2017 |
| 20220140770 | ROTATING ELECTRIC MACHINE AND ARMATURE - A rotating electric machine includes a neutral busbar and a temperature sensor. The neutral busbar has a main body and a bent part that retains the temperature sensor therein. The main body has first and second parts each of which has one or more connection terminals formed therein. The bent part is formed between a circumferential end portion of the first part and a circumferential end portion of the second part. In the first part, there is formed, between the circumferential end portion of the first part and a closest connection terminal formed in the first part to the bent part, a first extending portion that extends axially or radially. Similarly, in the second part, there is formed, between the circumferential end portion of the second part and a closest connection terminal formed in the second part to the bent part, a second extending portion that extends axially or radially. | 05-05-2022 |
