| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 318778000 | Starting control | 65 |
| 20080218117 | Method for turning a three-phase current motor on again and electrical circuit for implementing the method - A method for turning a three-phase alternating current motor on again, after it has been separated from a supply voltage, if a residual field voltage induced by a rotor residual field is present, and to an electrical circuit for implementing the method. The time progressions of the residual field voltage and the supply voltage are recorded, and the phase difference between the voltages is calculated in advance from the time progressions. A time point t | 09-11-2008 |
| 20090015189 | Motor starter - A motor starter whose production is improved is specified. In at least one embodiment, the motor starter includes a power semiconductor switch, an electromechanical bypass switch connected in parallel therewith, and control electronics to drive the bypass switch. In at least one embodiment, the control electronics are in the form of a printed circuit board assembly which is fixed to the bypass switch in an installed position, and the printed circuit board assembly and the bypass switch are designed such that, when being fixed, the printed board assembly makes electrical contact with the bypass switch at the same time. | 01-15-2009 |
| 20090015190 | Device for the control of a smooth starting or ending of a three phase current motor, so-called soft starter - An arrangement for the control of a soft starting or stopping of a three phase current motors ( | 01-15-2009 |
| 20090021206 | Motor soft start-up system - A soft start-up system for a motor that minimizes formation of surge and effectively contains its impacts upon any other source voltage in the peripheral to further promote safe power consumption is mounted on a motor source circuit and includes a power resistance and a relay; the power resistance is electrically connected in series to the motor; and the relay is connected in parallel with the motor and has a contact connected in parallel with the power resistance. Upon starting up of the motor, a drop generated at a working point to create delayed LV soft start-up for the motor under the condition of the activation point of the relay is OFF; and once the motor is started up, amperage drops and the relay is triggered off by returning to a working voltage connected in parallel to the relay, source at the working contact is conducted ON for the motor to resume its normal operation status. | 01-22-2009 |
| 20090121670 | CONSTRUCTIVE ARRANGEMENT IN A SOFT-STARTER - The present invention refers to a soft-starter having a new constructive arrangement comprising SCRs and a by-pass contactor connected through busbars that also provide an external connection to the soft-starter. The SCRs ( | 05-14-2009 |
| 20090167233 | Method of Manufacturing a Starting Device for a Three Phase Electric Motor, and a Starting Device - When manufacturing a starting device for a three-phase electric motor, especially a soft starter, in at least one embodiment an arc quenching system is at least partly removed from a commercially available contactor that so becomes to a modified contactor. In at least one embodiment, a modified contactor is used as a contactor in the starting device. | 07-02-2009 |
| 20090218980 | AC Motor Controller - A system, method, and device for monitoring an AC induction motor are disclosed. The exemplary system provides the architecture of an intelligent motor controller. On one hand, the controller has self-commission and adaptive tuning capability and can provide smooth start and stop for motor driven systems. On the other hand, the controller can provide fault detection, power metering, and history data logging, to ensure motor operates under optimal conditions. The exemplary system may have one or more sensors for monitoring characteristics of the AC induction motor and producing one or more inputs from the characteristics. | 09-03-2009 |
| 20090261775 | PERMANENT MAGNET MOTOR START-UP - Methods and apparatus are provided for startup of a permanent magnet alternating current (AC) motor. The method comprises the steps of detecting startup of the permanent magnet AC motor; detecting a mechanical oscillation of the permanent magnet AC motor when startup of the permanent magnet AC motor is detected; and, in response to detection of the mechanical oscillation of the permanent magnet AC motor when startup is detected, suppressing the mechanical oscillation of the permanent magnet AC motor. | 10-22-2009 |
| 20100007304 | DRIVE AND METHOD - A drive and a method, including an electric motor, which is supplied by a rectifier, the rectifier including a time-discrete closed-loop control structure, which regulates the stator current of the electric motor by setting the voltage applied at the motor, the current of the motor being acquired in time-discrete fashion, the closed-loop control structure including a closed-loop controller whose actual value is a first current component of the current, the setpoint input of the closed-loop controller being coupled with at least one upstream setpoint limiter. | 01-14-2010 |
| 20100060227 | MOTOR PROTECTION USING ACCURATE SLIP CALCULATIONS - An accurate slip calculation for providing monitoring and protection to an electric motor. The slip calculation is made using a minimum value of stator resistance as the initial stator resistance, where the minimum value of stator resistance is the minimum value of stator resistance calculated during an initiation period of the motor. The initiation period may be a predetermined time period or a predetermined number of cycles during the motor startup. The initiation period may start after a predetermined settling time or after a predetermined condition is met. | 03-11-2010 |
| 20100270966 | STARTING CIRCUIT FOR SINGLE-PHASE AC MOTOR - A starting circuit for a single-phase AC motor, consisting at least of a rectifying and voltage-stabilizing circuit, a control circuit with a zero-cross detecting circuit and a counter, and a bidirectional thyristor. The bidirectional thyristor is serially connected to a starting winding and a starting capacitor, the bidirectional thyristor, the starting winding and the starting capacitor are connected a utility power AC input. The input end of the rectifying and voltage-stabilizing circuit is connected to the utility power AC input. The output end of the rectifying and voltage-stabilizing circuit supplies power to the control circuit. The input end of the zero-cross detecting circuit is connected to the utility power AC input. The output end of the zero-cross detecting circuit is connected to the input end of the counter. The zero-cross detecting circuit detects zero crossing points of the utility power AC input and inputs the zero crossing points to the counter. | 10-28-2010 |
| 20110006722 | SYSTEM AND METHOD FOR ENERGIZING AN ELECTRIC MOTOR AUXILIARY WINDING AND ELECTRIC MOTOR - The present invention relates to a system and a method for energizing an auxiliary winding of a capacitor-start single-phase induction motor. Said system and method aim at reducing the voltage level in the bidirectional switches present in the topology during the blocking of said switches. The system and method proposed also aim at providing smooth switching of the electromechanical bidirectional switch existing in the topology. These gains in the reduction of the voltage level in the bidirectional switches and the smooth switching of the electromechanical bidirectional switch are achieved by means of a system for energizing an auxiliary winding of an electric motor, the auxiliary winding ( | 01-13-2011 |
| 20110050154 | ELECTRICAL SWITCHING APPARATUS INCLUDING A PLURALITY OF ROGOWSKI COILS AND METHOD OF CALIBRATING THE SAME - An electrical switching apparatus includes a plurality of poles each having a Rogowski coil and a conductor passing through an opening thereof, and a processor circuit including a sensor circuit including a plurality of inputs each electrically interconnected with an output of the Rogowski coil of a corresponding pole. The sensor circuit further includes a number of outputs having values each corresponding to current flowing through the conductor, a memory including for each corresponding pole an offset value and a gain correction factor for the sensor circuit, and a gain correction factor for the Rogowski coil, a number of routines, and a processor cooperating with the sensor circuit and the routines to provide for each pole a corrected current value as a function of a corresponding one of the values, the sensor circuit offset value and gain correction factor, and the Rogowski coil gain correction factor. | 03-03-2011 |
| 20110050155 | Softstarter device and method to control the softstarting of an electric motor - A self-adapting soft-starter device includes an electric current limiter limiting electric current supplied to the motor to a preset maximum current limit, a ramp-up time determiner determining the actual ramp-up time of the electric motor, a storing device storing a preset minimum ramp-up time, a comparator comparing the determined actual ramp-up time with the preset reference ramp-up time, a replacing device replacing the preset maximum current limit with an auto-adapted current limit based upon the outcome of the comparison between the determined actual ramp-up time and the preset reference ramp-up time. The soft-starter automatically optimizes the maximum current limit driven by the motor to match its load requirements which is useful to cater for load variations with time during the lifetime of the product in the application by avoiding the need for human intervention to change the soft-starter settings. Wear and tear is also reduced, extending motor lifetime. | 03-03-2011 |
| 20110285341 | METHOD AND DEVICE FOR AN INDUCTION MOTOR START - An object of the present invention is providing permissible values of start currents with sufficiently high start torque ensuring the possibility of the start of a loaded motor, the smoothness of the motor's start, without spikes and fluctuations of the currents, voltages and torques. | 11-24-2011 |
| 20110316469 | INPUT CIRCUIT FOR ALTERNATING CURRENT SIGNAL, AND MOTOR STARTER INCLUDING THE SAME - An input circuit includes an interface structured to output a logic signal from an alternating current signal of a pair of elongated conductors. A load is switchable to the elongated conductors. A processor outputs a control signal to switch the load to the elongated conductors asynchronously with respect to the alternating current signal for a first predetermined time, inputs the logic signal, determines if the input logic signal is active a plurality of times during the first predetermined time and responsively sets a first state of the alternating current signal, and, otherwise, sets an opposite second state of the alternating current signal, and delays for a second predetermined time, which is longer than the first predetermined time, for the opposite second state before repeating the output, and, otherwise, delays for a third predetermined time, which is longer than the second predetermined time, for the first state before repeating the output. | 12-29-2011 |
| 20120038310 | INRUSH CURRENT CONTROL FOR A MOTOR STARTER SYSTEM - A motor starter system includes a plurality of switches, and a controller operatively connected to each of the plurality switches. The controller is configured and disposed to selectively activate select ones of the plurality of switches upon detecting a particular phase angle of each of a plurality of phases of a multi-phase electrical source. | 02-16-2012 |
| 20120229070 | Single Phase Motor Energy Economizer for Regulating the Use of Electricity - A device for improving efficiency of an induction motor that soft-starts the motor by applying a voltage to the motor that is substantially less than the rated voltage then gradually increasing the voltage while monitoring changes in current drawn by the motor, thereby detecting when maximum efficiency is found. Once maximum efficiency is found, the nominal motor current is found and operating ranges are set. Now, the voltage to the motor is increased/decreased by measuring the phase angle between the voltage and the current to the motor and increasing the voltage when the phase angle is less than a minimum phase angle (determined during soft-start) and decreasing the voltage when the phase angle is greater than or equal to the minimum phase angle as long as the voltage does not fall below a minimum voltage determined during soft-start. | 09-13-2012 |
| 20120262103 | Softstarter For Controlling An Asynchronous Three-Phase Motor - A softstarter for starting and stopping an asynchronous motor having three phases, including two pairs of semiconductor devices of the type turning off at zero-crossing of the current therethrough, wherein each of the two pairs of semiconductor devices is connected in anti-parallel, and the first pair of the semiconductor devices is adapted to control the voltage of one of the phases of the motor and the second pair of the semiconductor devices being adapted to control the voltage of another of the phases of the motor, a DC reducing unit associated with the two pairs of semiconductor devices, a first voltage measuring unit for measuring voltages across the two pairs of semiconductor devices, and a first zero-crossing detecting unit configured for detecting zero-crossings of the measured voltages across the two pairs of semiconductor devices and providing zero-crossing signals to the DC reducing unit. | 10-18-2012 |
| 20130214719 | Method and Device for Starting Motors in Weak Grids - Method and device for starting a motor ( | 08-22-2013 |
| 20130285592 | MEDIUM VOLTAGE SOFT STARTER AND INDUCTION MOTOR KIT - The present invention includes an induction motor soft starter that includes a bypass contactor loop on which is disposed two anti-parallel connected SCRs and a current limiting reactor that limits the current rise during the switching on of the SCRs. | 10-31-2013 |
| 20130300338 | SINGLE PHASE MOTOR ENERGY ECONOMIZER FOR REGULATING THE USE OF ELECTRICITY - A device for improving efficiency of an induction motor soft-starts the motor by applying a power to the motor that is substantially less than the rated power of the motor then gradually increasing the power while monitoring changes in current drawn by the motor, thereby detecting when maximum efficiency is found. Once maximum efficiency is found, the nominal motor current is found and operating ranges are set. Now, the phase angle between the voltage and the current to the motor is measured and power to the motor is increasing when the phase angle is less than a minimum phase angle (determined during soft-start) and power to the motor is decreased when the phase angle is greater than or equal to the minimum phase angle as long as the voltage does not fall below a minimum voltage determined during soft-start. | 11-14-2013 |
| 20140145667 | RESIN-ENCAPSULATED CURRENT LIMITING REACTOR - The present invention is a resin-encapsulated current limiting reactor that has a number of layers of insulated copper with terminals on each end, and a number of layers of Nomex® fiber insulation wrapped adjacent to each other into a circular or elliptical shape, and encapsulated in polyurethane resin under vacuum. | 05-29-2014 |
| 20140197775 | Single Phase Motor Energy Economizer for Regulating the Use of Electricity - A system for controlling power from an AC voltage to an induction motor to reduce surge when power is restored to a power grid is disclosed including, a device for switching power to the induction motor that has a trigger controllable to enable the device to provide a variable amount of power to the induction motor. The system includes a second device for measuring the AC voltage at the source to determine when power is available, hence determining when the AC voltage is within operating range. Responsive to the AC voltage coming within operating range, the system delays for a time period then initiates power to the induction motor by controlling the device for switching power. | 07-17-2014 |
| 20140265995 | Two-step connection of electric motors by means of electromagnetic switches - A method and apparatus using electromagnetic switching in a two-step connection process is provided to minimize surge currents and torque oscillations in three-phase motors during starts. | 09-18-2014 |
| 20150091493 | USING PULSE WIDTH MODULATION IN A SINGLE PHASE DRIVE SYSTEM - Embodiments herein disclose a method for enabling operation of a single phase induction motor, the method comprising applying space vector Pulse Width Modulation (PWM) to the single phase induction motor; determining pulse width using location of the space vector associated with space vector PWM; and enhancing voltage levels of the single phase induction motor for a particular DC bus voltage using the determined pulse width and the location of the space vector. | 04-02-2015 |
| 20150115863 | MOTOR STARTER SYSTEM AND METHOD FOR OPERATING SAME - A motor starter system and a method for operating same are disclosed. According to an embodiment of the present invention, reliability of a motor protection function during an overcurrent is improved by automatically controlling the on/off state of an electromagnetic contactor using an analog sensor value outputted from an external sensor. In addition, the present invention can receive an external sensor value through a connected upper monitoring device, monitor, in real time, the motor starter state, and transmit a control command for directly controlling the on/off state of the electromagnetic contactor, and thus enables excellent operation, integrated lifetime prediction, and motor load management. Furthermore, the present invention can reduce wiring work and a cost thereof and maximizing the use of space more than when controlling the electromagnetic contactor by using the I/O of a PLC. | 04-30-2015 |
| 20150311828 | APPARATUS AND MEANS FOR STARTING OF AC MOTORS, ALGORITHM FOR SELF-ADAPTING MOTOR START WITH SOFT-STARTER - The invention relates to a method of starting an electric motor ( | 10-29-2015 |
| 20150311829 | APPARATUS AND MEANS FOR PROGRESSIVE MOTOR START BASED ON CURRENT DERIVATIVE SYNCHRONISATION - A method for controlling a switch that controls a power supply line of an electric motor from an alternating voltage source, including determination of a switch closing instant (t | 10-29-2015 |
| 20160134205 | DETECTION OF ELECTRIC MOTOR SHORT CIRCUITS - One embodiment describes a method that includes determining a desired torque level of a motor actuated by a motor starter; determining, using a control system, a configuration of the motor starter to achieve the desired torque level, in which determining the configuration includes determining which of a plurality of switching devices in the motor starter should be opened and which should be closed; and instructing, using the control system, the motor starter to implement the determined configuration by opening or closing one or more of the plurality of switching devices. | 05-12-2016 |
| 20160134206 | 5-POLE BASED WYE-DELTA MOTOR STARTING SYSTEM AND METHOD - One embodiment describes a motor starter, which includes a first single pole switching device that opens to disconnect power from a first winding of a motor; a second single pole switching device that closes after the first switching device opens to connect power to the first winding; a third single pole switching device closes after the second single pole switching device closes to increase power supplied to a second winding of the motor; a fourth single pole switching device that opens after the third single pole switching device closes to disconnect power supplied to a third winding of the motor and to reduce power supplied to the second winding; and a fifth single pole switching device that closes after the fourth switching device opens to connect power to the third winding. | 05-12-2016 |
| 20160134208 | TORQUE-BASED STEPWISE MOTOR STARTING - One embodiment describes a method that includes determining a desired torque level of a motor actuated by a motor starter; determining, using a control system, a configuration of the motor starter to achieve the desired torque level, in which determining the configuration includes determining which of a plurality of switching devices in the motor starter should be opened and which should be closed; and instructing, using the control system, the motor starter to implement the determined configuration by opening or closing one or more of the plurality of switching devices. | 05-12-2016 |
| 318779000 | With speed control | 3 |
| 20080309282 | Restart control of an A.C. motor drive - Method of and system for controlling the restart of an A.C. motor drive comprising an A.C. motor ( | 12-18-2008 |
| 20120256580 | SYSTEM AND METHOD FOR FAST START-UP OF AN INDUCTION MOTOR - A system for controlling operation of a motor drive during fast start-up of an induction motor is disclosed. The system includes an AC motor drive having a PWM inverter and a control system to generate a command signal to cause the PWM inverter to control an output of the AC motor drive. The control system includes a start-up modulator that is selectively operable during start-up acceleration of the AC motor, the start-up modulator programmed to determine a motor current applied to the AC motor and a voltage of a DC bus, generate a first frequency offset that causes a frequency reference of the command signal to be decreased when the motor current is greater than a reference current threshold, and generate a second frequency offset that causes the frequency reference of the command signal to be increased when the DC bus voltage is greater than a reference voltage threshold. | 10-11-2012 |
| 20150349673 | SYSTEM AND METHOD FOR INDUCTION MOTOR SPEED ESTIMATION USING A SOFT STARTER SYSTEM - A system and method for estimating operating characteristics of an induction motor is disclosed. The system includes a motor control device that is electrically connectable between a motor and a power source. The motor control device includes a plurality of switching devices comprising at least one thyristor corresponding to a respective phase of the motor. The motor control device also includes a controller programmed to disconnect the power source from the motor for a predetermined time period following a first plurality of cycles of a mains phase voltage of the power source. The controller is further programmed to measure a back-emf voltage during the predetermined time period, estimate an operating characteristic of the motor from the measured back-emf voltage, and trigger the plurality of switching devices to reconnect the power source to the motor following estimation of the operating characteristic. | 12-03-2015 |
| 318780000 | Three phase motor with variable transformer to initially adjust voltage to motor windings | 1 |
| 20090108795 | APPARATUS AND METHOD FOR STARTING AND STOPPING AN AC INDUCTION MOTOR - An apparatus ( | 04-30-2009 |
| 318781000 | Operating from a single phase source | 29 |
| 20080265829 | Inverter apparatus and a semiconductor device used for the same | 10-30-2008 |
| 20100013426 | ELECTRONIC STARTER DEVICE FOR AN ELECTRIC MOTOR, IN PARTICULAR FOR A COMPRESSOR OF A REFRIGERATING CIRCUIT OF AN ELECTRIC HOUSEHOLD APPLIANCE - An electronic starter device for an electric motor including a first terminal connected in use to a mains voltage source selectively activatable by means of control means to feed respective starter and run windings of the electric motor; switch means arranged in series between the voltage source and the starter winding to selectively feed the starter winding; generating means of a first low voltage potential (V | 01-21-2010 |
| 20110025254 | SINGLE PHASE INDUCTION MOTOR - The present invention relates to a single phase induction motor, and more particularly, to a single phase induction motor, wherein a variable resistance element which can change a winding number of a main winding or an auxiliary winding capable of producing a magnetic field at the time of starting is connected in parallel to some portion of the main winding or the auxiliary winding. A single phase induction motor including a stator composed of a core, a main winding and an auxiliary winding, and a rotor rotated by a mutual electromagnetic force by the stator comprises a resistance variable element connected in parallel to some portion of the main winding. In addition, a single phase induction motor including a stator composed of a core, a main winding and an auxiliary winding, and a rotor rotated by a mutual electromagnetic force by the stator comprises a capacitor connected in series to the auxiliary winding, and a resistance variable element connected in parallel to some portion of the auxiliary winding and the capacitor. | 02-03-2011 |
| 20120025748 | METHOD FOR STARTING A SINGLE-PHASE INDUCTION MOTOR - The invention relates to a method ( | 02-02-2012 |
| 20160197566 | METHOD AND APPARATUS TO CONTROL A SINGLE-PHASE INDUCTION MOTOR | 07-07-2016 |
| 318782000 | With protective features | 2 |
| 20090230914 | Motor Start Circuit with Capacitive Discharge Protection - A motor start circuit for an AC induction motor employs a DC relay whose NC contacts are placed in series with the start capacitor. A half full-wave rectifier arrangement has an AC input connected to the junction of the relay switch and the start capacitor, and DC outputs applied across the relay actuator coil. In the event of intermittent application of power to the motor, any residual charge on the start capacitor will feed current to the actuator coil to hold the relay switch open until the residual charge has decayed sufficiently, to avoid damage to the motor from capacitive discharge. A high magnetic retentivity core can be used to hold the relay off for sufficient time for stored energy to dissipate. | 09-17-2009 |
| 318783000 | Thermal starting and thermal overload protection | 1 |
| 20130320909 | MOTOR STARTER CIRCUIT, PARTICULARLY FOR COMPRESSORS OF REFRIGERATORS - A motor starter circuit particularly for compressors of refrigerators, comprising a starter device ( | 12-05-2013 |
| 318784000 | Impedance for reducing current during starting operation | 1 |
| 20150349672 | SOFT START DEVICE FOR ELECTRONIC CUTTING MACHINE TOOL - A soft start device for a power cutting machine tool, a control circuit group includes two end, one of which is connected with an input power source and the other is connected with each of two control switches. When the input power source provides a working voltage for the control circuit group, the control circuit group outputs a low-level signal to the control switches to enable a light emitting circuit group to lighting gradually from dark to light, whereby a resistance of a trigger circuit group decreases gradually to make motor setup the working voltage. Next, the control circuit group outputs a high-level signal after a period of time, to turn on the control switches for inputting voltage to the motor directly. The soft start device can not only decrease the noise during activation of the motor but effectively protect the internal components of an electronic device from damage. | 12-03-2015 |
| 318785000 | Start winding removed during running operation | 16 |
| 20110001450 | MOTOR START CIRCUIT FOR AN INDUCTION MOTOR - A motor start circuit for an induction motor includes a start switch device serving the purpose of interrupting the current or voltage flow through the start winding after the start of the motor. The motor includes a main winding and a start winding, which are supplied with alternating current or voltage from a mains power supply. | 01-06-2011 |
| 20130264991 | START AND CONTROL METHOD FOR A SINGLE-PHASE INDUCTION MOTOR, A START AND CONTROL SYSTEM FOR A SINGLE-PHASE INDUCTION MOTOR AND AN ELECTRONIC START AND CONTROL DEVICE APPLIED TO A SINGLE-PHASE INDUCTION MOTOR - The present invention relates to a method, a system and an electronic device ( | 10-10-2013 |
| 20140049205 | START CAPACITOR ASSEMBLIES AND METHODS FOR OPERATING ELECTRIC MOTORS - Start capacitor assemblies and methods for operating electric motors are described. In one example, a start capacitor assembly for connection to an electric motor includes a film capacitor and a resistor. The film capacitor has a first terminal and a second terminal. The resistor is coupled to the film capacitor in parallel with the first terminal and the second terminal of the film capacitor | 02-20-2014 |
| 20140132199 | METHOD FOR STARTING A SINGLE-PHASE INDUCTION MOTOR, STARTING DEVICE FOR A SINGLE-PHASE MOTOR AND STARTING SYSTEM THEREFOR - The present invention relates to a starting device for a single-phase induction motor, comprising a stator (M) with an running winding (B | 05-15-2014 |
| 318786000 | By electronic switch | 11 |
| 20090128082 | Switching system for controlling the starting of an electrical motor - A low cost switching system for an electrical motor, which is speed sensitive, direction of rotation insensitive, load insensitive and voltage fluctuation insensitive. The switch contains a power supply, a control circuit, a zero cross detector circuit, a triggering circuit and an electronic switch to provide the switching action. A time delay hysterisis inducement circuit is provided in the switching system to energized and deenergized the capacitor at a predetermined synchronous speed of the motor. The switching system first checks the speed of the motor before reenergizing the start capacitor, which increases the life of the motor. The switching system operates in high temperature range and regardless the value of the capacitor used. | 05-21-2009 |
| 20090174359 | CONTROL OF A TRIAC FOR THE STARTING OF A MOTOR - A method and a circuit for controlling a triac intended to be series-connected with a resistive element of positive temperature coefficient or a capacitive element, and a winding for starting an asynchronous motor, for supply by an A.C. voltage, the present invention including the steps of: detecting a voltage representative of the voltage across the series connection of the element and of the triac; comparing this detected voltage with respect to a threshold; and blocking a turning back on of the triac when the threshold has been exceeded. | 07-09-2009 |
| 20100207569 | STARTING CIRCUIT FOR SINGLE-PHASE AC MOTOR AND METHOD FOR STARTING SINGLE-PHASE AC MOTOR - A starting circuit for a single-phase AC motor, the single-phase AC motor comprising a main winding and a starting winding, and the starting circuit comprising a detecting circuit, a rectifying circuit, a triggering circuit, and a switch, wherein the detecting circuit is connected in series with the main winding, the switch is connected in series with the starting winding, the detecting circuit transfers current parameters of the main winding into detecting signals, the rectifying circuit processes the detecting signals and transmits the detecting signals to the triggering circuit, the triggering circuit controls the switch according to the detecting signals whereby controlling power-on and power-off of the starting winding, and the triggering circuit is a hysteresis comparing circuit. | 08-19-2010 |
| 20110001451 | Method and device for starting single-phase asynchronous motors - A method and device for starting single-phase asynchronous motors which substantially consists in disengaging the start winding of a single-phase asynchronous motor, after its starting, by using a switching means that is connected in series to the start winding. The switching means is controlled as a function of a starting time and of a starting voltage. | 01-06-2011 |
| 20110018486 | METHOD FOR STARTING SINGLE PHASE INDUCTION MOTOR AND ELECTRONIC RELAY USING THE SAME - An electronic relay for single phase induction motor, the electronic relay including a triac located between a start winding and a start capacitor of the single phase induction motor to control current flow of the start winding and an induced voltage detection circuit to detect an induced voltage of the start winding proportional to an angular velocity of the motor. The electronic relay is adapted to detect a zero-point voltage of a motor line voltage before start of the motor and to calculate an acceleration torque during start of the motor. The electronic relay is programmed to turn on the triac when the zero-point voltage of the motor line is detected and to turn off the triac when the acceleration torque begins decreasing. | 01-27-2011 |
| 20110193511 | CONTROL CIRCUIT FOR SINGLE-PHASE AC MOTOR OF DRYER - A control circuit for a single-phase AC motor of a dryer, including at least an electronic starting circuit including at least a starting control unit, a first drive circuit, and a bidirectional triode thyristor, a second drive circuit, and a mechanical switch K. The bidirectional triode thyristor is serially connected to a starting winding and a starting capacitor of the motor, and connected to an AC input. The starting control unit is connected to a control end of the bidirectional triode thyristor via the first drive circuit. The mechanical switch K is serially connected to an electrical heating wire, and is connected to the AC input. The starting control unit is connected to a control end of the mechanical switch K via the second drive circuit. The first drive circuit and the second drive circuit are interlocked with each other. | 08-11-2011 |
| 20110298413 | CONTROL CIRCUIT FOR SINGLE-PHASE AC MOTOR FOR DRYER - A single-phase AC motor control circuit for a dryer, including a starting control unit, a first drive circuit, a bidirectional triode thyristor BCR | 12-08-2011 |
| 20120274262 | VOLTAGE AND SPEED SENSITIVE MOTOR CONTROL STARTING CIRCUIT - A voltage and speed sensitive solid state motor control starting circuit is a RPM voltage sensing circuit for controlling the starting circuit operation of an AC induction motor. The circuit effectively removes the start capacitor from the AC circuit at a predetermined RPM cutout voltage and reengages the start capacitor at a predetermined cut in voltage. The circuit may be installed on an AC induction motor to replace conventional mechanical switches that are used for removing start capacitors from the AC induction motor circuit. The circuit is more simplified and less complex than conventional mechanical switches, while being very efficient. | 11-01-2012 |
| 20150137730 | ASYNCHRONOUS MOTOR AND METHOD FOR OPERATING AN ASYNCHRONOUS MOTOR - In a method for operating an asynchronous motor including a main winding and an auxiliary winding, a start capacitor is connected in series with the auxiliary winding before the asynchronous motor is started up and is disconnected at a point in time, which is to be determined, after the asynchronous motor is started up. The voltage of the auxiliary winding is measured and at least one mathematical model is used, which models the voltage amplitude of the voltage of the auxiliary winding in relation to time and includes at least one parameter of the dynamic process of the motor starting procedure, which is determined on the basis of the mathematical model and the course of the amplitude or the effective value of the measured voltage of the auxiliary winding, and the point in time for disconnecting the start capacitor is determined by means of the determined parameter. | 05-21-2015 |
| 318788000 | With variable temperature coefficient resistor in switch control circuit | 2 |
| 20100134063 | LOW CURRENT ELECTRIC MOTOR STARTER - A low cost motor starter is shown having a PTC resistor | 06-03-2010 |
| 20150054446 | ELECTRONIC CONTROL CIRCUITRY WITH START UP CAPABILITY - Certain configurations of the present disclosure present a PTC starter. The PTC starter includes a housing, a first conductive terminal ( | 02-26-2015 |
| 318793000 | By centrifugal switch | 1 |
| 20110221381 | ELECTRIC MOTOR AND SWITCH FOR ELECTRIC MOTOR HAVING ARC BARRIER - A switch for an electric motor has a switch arm comprising a lever and an arc barrier formed integrally with the lever. The switch has first and second electrical contacts. The switch arm and second electrical contact are moveable relative to the first contact between an open position and a closed position. The arc barrier is positioned adjacent the first contact in the closed position. The arc barrier limits the risk of electrical arcing associated with the electrical contacts. The switch is suitable for use in an electric induction motor. For example, the switch can be adapted to de-energize auxiliary start windings when an electric induction motor is up to speed and/or to provide a signal indicating the motor is operating. | 09-15-2011 |
| 318794000 | Capacitor run motor with different capacitance at starting | 5 |
| 20090160393 | Starting Control Apparatus and Method for Motor - Entry of a synchronous speed of a rotor can be facilitated by increasing a starting torque by adjusting a magnetization application time for magnetizing the rotor according to whether or not a starting capacitor is used. The present invention includes: a control unit that outputs a control signal for controlling an application time of a magnetizing current according to whether or not a starting capacitor is used; and a switch that supplies power to an exciting coil according to the control signal outputted from the control unit. | 06-25-2009 |
| 318795000 | With plural capacitors | 4 |
| 20090108796 | Starting Control Apparatus and Method for Motor - An apparatus and method for controlling starting of a motor are disclosed. An exciting coil of a motor is excited by using a controller of an electronic refrigerator without having an extra excitation control circuit, to thereby simplify a component construction for controlling exciting of the motor and thus reduce complexity. The present invention includes: a main coil and an auxiliary coil (sub-coil); an exciting coil that generates an excitation current; a refrigerator control unit that outputs a control signal for controlling an application time of the excitation current when started; and a switch unit electrically connected with the exciting coil and supplying power to the exciting coil according to the control signal outputted from the refrigerator control unit. | 04-30-2009 |
| 20100052600 | STARTING DEVICE FOR ELECTRIC MOTORS - Starting device for electric motors provides a circuit including: a first branch connected at one end to a common point and at the opposite end to the start winding of the motor, whereon a starting capacitor, a resistor and fixed contacts of a relay are inserted in series respectively; a second branch in parallel with the first branch, connected at one end to the common point and at the opposite end to the main or run winding of the motors whereon the coil of the relay is inserted; a third branch in parallel with the branches and, connected at one end to the common point and at the opposite end to the start winding of the motor, whereon a run capacitor is installed, this common point being connected to the common connector of the motor via the power supply line. | 03-04-2010 |
| 20110204840 | METHOD OF ACTUATING A SINGLE-PHASE MOTOR, A SYSTEM FOR ACTUATING A SINGLE-PHASE MOTOR AND A SINGLE PHASE MOTOR - The present invention relates to a method of actuating a single-phase motor, a system for actuating a single-phase motor and a single-phase motor, especially applied to a system that enables one to actuate single-phase induction motors of the CSR (capacitive start and run) type, as well as single-phase induction motors of the RSIR (resistive start inductive run), RSCR (resistive start capacitive run) and CSIR (capacitive start inductive run) types. The proposed method enables the system to actuate indistinctly any of the configurations of single-phase induction motor ( | 08-25-2011 |
| 20130214720 | Hard Start Kit for Multiple Replacement Applications - A hard start capacitor replacement unit has a plurality of capacitors in a container sized to fit in existing hard start capacitor space. The capacitors are 4 metallized film capacitors wound in a single cylindrical capacitive element. The container has a common terminal and capacitors value terminals for the plurality of capacitors, which may be connected singly or in combination to provide a selected capacitance. An electronic or other relay connects the selected capacitance in parallel with a motor run capacitor. The hard start capacitor replacement unit is thereby adapted to replace a wide variety of hard start capacitors. | 08-22-2013 |
