Abstract: With an object of allowing steering wheel operation to be carried out easily at a normal time and when an abnormality occurs, the invention includes a motor having two windings and a control unit having two control systems that supply control signals to each winding of the motor, and when an abnormality occurs in one winding of the motor or in one system inside the control unit, a supply of current to the winding in which the abnormality has occurred is cut to zero, and the motor is driven by a predetermined current necessary at a normal time being supplied to the other winding, while at a time of a normal drive when no abnormality has occurred, the current supply is shared between the two windings, whereby the motor is driven.

Abstract: An electric power unit having a heat emitting component includes a battery case provided in an extension direction of an output shaft of the motor, and spaced apart from the motor case, and a cooling fan provided between the battery case and the motor case. The battery case includes a discharge port formed at a position facing the cooling fan, and a suction port provided at a position spaced apart from the discharge port.

Abstract: A compressor driving apparatus and an air conditioner including the same, whereby the compressor driving apparatus includes a capacitor connected to a DC terminal, an inverter, including a plurality of three-phase switching devices, to convert DC power from the capacitor into AC power to drive a compressor motor, an output current detector to detect output current flowing in the motor, and a controller to output a switching control signal for controlling the inverter based on the output current, wherein the controller performs control such that some of the three-phase switching devices in the inverter are turned on or off in a compressor preheating mode.

Abstract: An inverter system failure is detected on the basis of the currents of respective phases detected by a current detection unit when carrying out switching control in accordance with a first drive mode in which all switching elements on a lower-side arm are switched on and all switching elements on an upper-side arm are switched off, and the currents of respective phases detected by the current detection unit when carrying out switching control in accordance with a second drive mode in which all of the switching elements on the upper-side arm are switched on and all of the switching elements on the lower-side arm are switched off.

Abstract: A motor controller includes: an error suppression compensation unit that outputs an error suppression signal for driving the motor such that a difference between the position command signal and a signal based on the motor position signal equals zero; an acceleration extraction unit that outputs an acceleration component of a natural frequency of a stand from a stand vibration signal; an acceleration compensation unit that outputs a proportional compensation signal obtained by multiplying the stand acceleration signal by a proportional gain; a machine end correction unit that outputs a machine end correction signal, and decreases an amplitude of vibration at the machine end relative position; and an addition unit that outputs a signal obtained by adding the machine end correction signal to the error suppression signal.

Abstract: A motor-driving apparatus, which drives a motor while controlling the motor based on an external command signal from an external device, includes an external command processor, a program storage, a motor controller, a program rewriting unit, a rewriting data input terminal. The external command processor outputs a motor control command from the external command signal based on an external command processing program. The motor controller controls an operation of the motor according to the motor control command based on a motor control program. Further, the external command processing program and the motor control program are previously stored in the program storage. The program rewriting unit rewrites only the external command processing program stored in the program storage based on the program rewriting data received from the rewriting data input terminal.

Abstract: A switching power supply device having: a power supply terminal VCC connected to one end of an output capacitor Co2; a high-voltage terminal VH connected to the input side of an input voltage Vdc; and a starting circuit 101 provided between the power supply terminal VCC and the high-voltage terminal VF, the starting circuit 101 passing a first current for charging the output capacitor Co2 via the power supply terminal VCC. The switching power supply device is provided with: a control circuit 10 for turning a switching element M1 on and off; and a current-supplementing circuit 30 to which the input voltage Vdc is inputted, the current-supplementing circuit 30 being connected to the high-voltage terminal VH, the current-supplementing circuit 30 passing a second current to the output capacitor side on the basis of the first current. A load L2 can be connected to the other end of the output capacitor.

Abstract: A device (1) for starting a motor (4) for alternating current, in particular for a compressor (5), wherein the motor (4) has at least one feed line (3) for the electrical power supply. The device comprises an actuator element (10) for limiting the current in the feed line (3), a switching element (16) for bypassing the actuator element (10), a current-monitoring element (15) for monitoring the current in the feed line (3), and a controller (18) for controlling the switching element (16). The actuator element (10) comprises at least a first start-up element (11) and a second start-up element (12) as well as a switch-over element (14) for switching over between the at least first and second start-up elements (11, 12).

Abstract: An adjustment device for a closure element on a vehicle, such as e.g. a window pane, a sunroof or a convertible top, is provided. The closure element is adjustable between an open and a closed position by means of the adjustment device, wherein the adjustment device includes a drive motor and an electronic control unit for adjusting the closure element and the control unit comprises a bridge circuit, in order to supply the drive motor with electric power and control the rotational speed and the direction of rotation of a drive element of the drive motor to be coupled with the closure element. The bridge circuit is connected with at least one additional load of the vehicle, such as e.g. a window heater, and is formed and provided to control the energization of the at least one additional electronic load.

Abstract: A motor assembly that includes a motor (102) having a rotatable shaft, a hub coupled to the rotatable shaft, the hub having a propeller indexer to receive a propeller (104), when the propeller is present, a sensor trigger rotatable with the shaft (100) and positioned at a propeller offset angle ?PROP from the propeller indexer, and a sensor coupled to the motor and positioned to detect the sensor trigger so that the propeller indexer may be positioned at the propeller offset angle ?PROP from the sensor through rotation of the shaft so that said sensor is proximate to the sensor trigger.

Abstract: A motor control system includes a motor driving circuit and a motor. The motor driving circuit includes a control module, a PWM signal detecting module, a transient state detecting module and a driving module. The PWM signal detecting module is electrically connected to the control module to receive a PWM signal and to convert the PWM signal into a first digital PWM control signal. The transient state detecting module provides a second digital PWM control signal to the control module according to the first digital PWM control signal at a first time point and the first digital PWM control signal at a second time point. The driving module receives at least one driving signal from the control module. The control module determines whether to turn off a low side switch of the driving module according to the second digital PWM control signal.

Abstract: A leak-current detecting unit detects a zero-phase current flowing from an electric-motor driving device, which drives an electric motor with electric power from an alternating-current power supply, or the electric motor to a ground, a leak-current control unit that, on the basis of the zero-phase current detected by the leak-current detecting unit, generates a control signal having cyclicity synchronized with the alternating-current power supply, and an anti-phase generating unit that generates an anti-phase current that is in anti-phase to the zero-phase current on the basis of the control signal from the leak-current control unit, and outputs the anti-phase current.

Abstract: A motor driving circuit includes a first output switch, a second output switch, a first adjusting module, and a second adjusting module. A rising slew rate of the first output current along the first direction is adjusted according to the first adjusting parameter of the first adjusting module. A falling slew rate of the first output current along the first direction is adjusted according to the second adjusting parameter of the second adjusting module.

Abstract: An inverter controller according to an embodiment has an inverter main circuit, current detectors, a current command value calculator, a voltage command value calculator and an estimator. The inverter main circuit is capable of being electrically connected to a rotary drive target. The current detectors detect current values output from the inverter main circuit. The current command value calculator calculates current command values with which an output voltage output from the inverter main circuit becomes equal to or more than a target value. The voltage command value calculator calculates voltage command values with which the current values become equal to the current command values. The estimator calculates an estimated rotational phase angle of the rotary drive target, based on the voltage command values and the current values.

Abstract: A motor control apparatus includes: a booster circuit electrically connected to a battery; and an inverter electrically connected to the booster circuit at one end and electrically connected to a motor at another end. The motor control apparatus is provided with a controller configured to control the inverter to output square wave voltage to the motor, thereby driving the motor. The controller is configured to control the inverter to temporarily invert voltage polarity associated with the square wave voltage, on the basis of a phase difference between a voltage command associated with the motor and an electric current associated with the motor, on condition that an operating point of the motor is in a resonance region, which is an operation area in which resonance is generated in the booster circuit.

Abstract: A system includes a control module, a velocity-detecting module and a state-analyzing module. The control module generates a control command to control the servo drive system, and bases on the control command to define angular-acceleration standard ranges with respect to detection times. The velocity-detecting module detects output angular-velocity values of the servo motor with respect to detection times upon when the servo motor is driven. The state-analyzing module includes a processing unit and an abnormal-state judging unit. The processing unit stores the output angular-velocity values, and bases on the output angular-velocity values to calculate output angular-acceleration values with respect to the detection times. The abnormal-state judging unit determines whether or not each of the output angular-acceleration values with respect to each of the corresponding detection times is within the respective angular-acceleration standard range and thereby to generate corresponding comparison results.

Abstract: A motor drive circuit for use in driving a motor having two or more phases comprising a motor bridge having, for each phase of the motor, a bridge arm comprising an upper switch and a lower switch that in normal operation may be opened and closed to modulate the voltage applied to the respective phases in response to drive signals from a motor control circuit, at least one solid state phase isolation relay that is provided in series in an electrical path connecting a respective phase of the motor to a respective bridge arm, the relay being closed in normal operation so that current can flow in the phase and is held open in a fault mode of operation to prevent the flow of current in the phase.

Abstract: A power tool that includes a motor configured to drive a working element, a power supply that is coupled to the motor to provide power to the motor, a shunt circuit that is coupled to the power supply, and a controller. The shunt circuit includes a shunt switch and a shunt element and is configured to hold a voltage of the power supply below a high voltage threshold. The shunt switch is switchable between a conducting state, in which the shunt switch conducts current through the shunt element, and a non-conducting state, in which the shunt switch does not conduct current through the shunt element. The controller is coupled to the motor, the power supply, and the shunt circuit and is configured to determine the voltage of the power supply, and control the shunt switch based on the voltage from the power supply.

Abstract: A rotary positioning system configured to provide absolute referencing is provided. The rotary positioning system includes an encoder mounted on a motor shaft of a motor and configured to generate an index pulse corresponding to a complete rotation of the motor shaft. The rotary positioning system also includes a speed reducer coupled to the motor shaft and configured to reduce a rotary motion of the motor by a pre-defined ratio and an output drive shaft coupled to the speed reducer and configured to transfer the reduced rotary motion to a load. The rotary positioning system further includes a sensor mounted on the output drive shaft of the speed reducer and configured to determine an absolute orientation of the output drive shaft and a controller coupled to the sensor and configured to generate a correlation function of the absolute orientation and the index pulse count.

Abstract: A method of controlling an electric motor of a drive device of a power steering system, in which a temperature sensor senses the temperature of the drive device and transmits information about the temperature of the drive device to an evaluation unit, the evaluation unit estimates the temperature of a gearbox based on the temperature of the drive device, and, based on the estimated temperature of the gearbox, the evaluation unit adjusts a requested torque of the electric motor.