Abstract: A power supply system includes a first controller that, controls an MG1 inverter, a second controller that controls an MG2 inverter, and a voltage sensor that detects a voltage generated from a pair of output terminals. The first controller controls the MG1 inverter according to a target value of the voltage generated from the output terminals, irrespective of the magnitude of a deviation between the target value of the voltage generated from the output terminals, and the detected voltage. The second controller controls the MG2 inverter according to the deviation. This processing is implemented by an effective value computing unit, effective value PI control unit, and a neutral point output voltage command unit.

Abstract: A motor control apparatus includes a rectifier which converts AC of a power source to DC, an inverter which converts DC to AC for a motor, a voltage amplitude calculation unit which calculates a power source voltage amplitude value, a power failure recovery detection unit which determines whether or not the AC input side has transitioned to a power failure state or a power recovery state on the basis of the power source voltage amplitude value, a protection operation command unit which outputs a protection operation command when a reference time has elapsed from a time point at which the AC input side transitioned to the power failure state, a time measurement unit which measures an elapsed time from when the AC input side transitioned to the power recovery state, and a condition change unit which changes the power failure reference voltage value and/or the reference time.

Abstract: This invention is concerning a control apparatus for an AC rotary machine including: an AC rotary machine that includes a first winding and a second winding which have a phase difference; a first current detection unit that detects a current of the first winding; a second current detection unit that detects a current of the second winding; a control unit that calculates a first voltage command and a second voltage command on the basis of a detected current value; and a first detectability determination unit that determines a detectability of the current of the first winding, detected by the first current detection unit, on the basis of at least one of the voltage commands , wherein the control unit calculates the first voltage command and the second voltage command on the basis of the detected current value of the second winding when the current of the first winding is undetectable.

Abstract: An electric drive system includes a permanent magnet machine having a rotor and a stator and a power converter electrically coupled to the permanent magnet machine and configured to convert a DC link voltage to an AC output voltage to drive the permanent magnet machine. The power converter includes a plurality of silicon carbide switching devices having a voltage rating that exceeds a peak line-to-line back electromotive force of the permanent magnet machine at a maximum speed of the permanent magnet machine.

Abstract: An air conditioner and a compressor protection circuit thereof are provided. When overcurrent occurs in a phase current of a compressor, an overcurrent level signal is output by a voltage comparison module, and is latched and output to an intelligent power module by a signal latching module, and the intelligent power module shuts off the output of the phase current according to the overcurrent level signal, so as to achieve the overcurrent protection of the compressor; and subsequently, a conventional level signal is output to the signal latching module by the voltage comparison module, the signal latching module keeps outputting the overcurrent level signal, and outputs the conventional level signal until a latching cancel signal output by a signal processing circuit is received, so that the intelligent power module starts the output of the phase current, thereby enabling the compressor to normally operate.

Abstract: A system for controlling movement of an actuator includes an input power source that provides an input pulse width (PWM) signal; a motor driver that receives the PWM signal and provides a synthesized three-phase drive signal; a brushless direct current (BLDC) motor that receives the drive signal and operates in response to the received drive signal to reposition the actuator; and a controller that receives the PWM signal. The controller includes an amplitude detection module that detects the amplitude of the PWM signal, and a direction detection module that detects the polarity of the PWM signal.

Abstract: A driving circuit of a PMSM can include: a current sampling circuit that obtains a current sampling signal by sampling a rotor current of one phase of the PMSM; a sliding mode estimating circuit that receives the current sampling signal and a voltage sampling signal that represents a rotor voltage of the phase, estimates a back electromotive force information of the phase, and generates a first voltage signal that represents the back electromotive force information; a speed computing circuit that receives the first voltage signal, and generates an angular velocity signal that represents rotor cycle information; and a PWM control circuit that generates a PWM control signal according to the angular velocity signal, where the PWM control signal controls the turn on/off of switches in a three-phase inverter, to control an operating current of the PMSM to be a sine wave current.

Abstract: A motor control device includes: an X-axis detector; a Y-axis detector; a trajectory command generator that outputs a first position command and a second position command; an X-axis response correction unit that outputs a corrected position command; an X-axis position control unit that generates a first torque command; a Y-axis position control unit that generates a second torque command; a Y-axis measuring instrument that detects second machine end displacement; a Y-axis zero-point estimation unit that extracts characteristics of a zero point of a transfer function on the basis of the second torque command and the machine end displacement or on the basis of the second position command and the machine end displacement; and a response-correction-parameter determination unit that sets a response correction filter by using the characteristics of the zero point.

Abstract: A method for driving a vibrating motor is provided in the present disclosure. The method includes the following steps: providing a driving signal to a vibrating motor; detecting a vibration direction of a vibrating unit of the vibrating motor; determining whether the driving signal facilitates vibration of the vibrating unit; and switching a polarity of the driving signal when the driving signal does not facilitate the vibration of the vibrating unit.

Abstract: In one aspect, an apparatus includes a motor and inverter configured to provide input power to the motor and a data store comprising at least one entry including a first torque command, a first motor speed, and a first DC voltage value. The first torque command and the first motor speed and the first DC voltage value are associated with a first current output. The apparatus includes a processor configured to receive a torque input, a DC voltage input, and a motor speed input and determine an output current associated with the torque input, the DC voltage input, and the motor speed input, correct the output current to be within a voltage constraint of the motor when the DC voltage input is than a reference voltage at the motor and output the corrected output current to cause the inverter to provide the input power to the motor.

Abstract: An apparatus for restarting a medium voltage inverter is disclosed, wherein the medium voltage inverter can be restarted by estimating a rotor speed when an input power returns from an instantaneous defective state to a normal state, whereby a time to restart the medium voltage inverter can be reduced by a simple configuration to dispense with the need to wait until the rotor speed reaches zero speed.

Abstract: In one aspect, an apparatus includes a motor and inverter configured to provide input power to the motor. The apparatus may also include a data store comprising at least one entry including a first torque command, a first motor speed, and a first DC voltage value, where the first torque command and the first motor speed and the first DC voltage value are associated with a first current output and a processor. The processor receives a torque input, a DC voltage input, and a motor speed input and identifies the current output associated with the torque input, the DC voltage input, and the motor speed input based on another motor speed different than the motor speed input and another DC voltage different than the DC voltage input and the motor speed input, and output the determined current output to cause the inverter to provide the input power to the motor.

Abstract: A system that improves on known systems for reducing output torque by a motor in the event of a jam may include an electromechanical actuator (EMA), a motor configured to drive the EMA and a controller. The controller may be coupled to the motor and configured to receive a speed of the EMA and a position of the EMA. The controller may be further configured to determine whether a jam of the EMA is imminent or is occurring according to the EMA speed, EMA position, and a known range of motion of the EMA, and to provide an input signal to the motor to reduce a torque of the motor if a jam of the EMA is imminent or is occurring.

Abstract: A vehicle is configured with an N-phase electric machine, a first on-board electrical sub-system and a second on-board electrical sub-system. The electric machine includes a rotor and a stator system, wherein the first onboard electrical sub-system includes an inverter and the stator system is linked to the inverter. The electric machine can be operated using an inverter controller on the principle of a field-oriented control system, so that the electric machine is linked to a control unit, wherein the inverter can be controlled by the control unit, and the control unit uses a phased activation method to control the inverter.

Abstract: A motor control unit having a motor structure that rotates a rotor by voltage excitation includes a photo interrupter, a slit rotation plate, a comparator, and an encoder circuit in order to obtain a position detection signal corresponding to a rotational phase of an output shaft. During a period of time from the motor stopping to the change of the output of an encoder circuit after the supply of a drive voltage waveform, a CPU supplies a drive voltage waveform that is advanced by an advance angle amount that has been set in advance to the motor, and after the change of the output of the encoder circuit, a drive signal by which the advance angle amount is controlled based on the output of the encoder circuit is supplied to the motor.

Abstract: A motor controller configured to control different types of electronically commutated motors (ECMs) includes a range of different rotor orientation signal inputs to accommodate differences between ECM motor types. The motor controller includes a control unit that receives motor operation commands and controls operation of the ECM in accordance with the motor operation commands. The control unit receives and stores data designating ECM type and estimates rotor position based on the designated ECM type.

Abstract: The present invention relates to an inverter vector driving system and a method for estimating capacitance using the same. The present invention provides a method for estimating capacitance in an inverter vector driving system including a capacitor to which a rectified DC voltage of a three-phase power supply is charged, and a PWM inverter configured to transform the DC voltage into a three-phase AC voltage to be applied to a motor of an induction motor, including: operating the motor of the IM in a regeneration mode; generating a d-axis voltage command and a q-axis voltage command for the motor; adjusting a pulse of the PWM inverter by using the d-axis voltage command and the q-axis voltage command; and estimating capacitance of the capacitor by using a DC-link voltage and a DC-link current that are generated at the capacitor due to the inclusion of the AC component.

Abstract: A control method and system of an electrical vacuum pump is provide to resolve generation of peak current when a motor of the electrical vacuum pump initially starts and implement a soft start. The electrical vacuum pump generates vacuum by suctioning air by rotating a pump with a motor. The control method includes starting the motor by supplying a power supply to the motor to switch on the electrical vacuum pump and sensing current applied to the motor using a current sensing circuit. In addition, the method includes determining a target value of motor input voltage set as a value according to the sensed applied current while starting the motor until the sensed applied current reaches a predetermined current and adjusted the motor input voltage applied to the motor to correspond to the target value.

Abstract: A device or method for stabilizing a voice coil is disclosed. The device comprises a voice coil for providing a motive force, and means for measuring a signal from said voice coil related to a motional electromotive force. The device further comprises a unit for controlling an amplification of said signal to create a force in said voice coil in a direction of said motional electromotive force.

Abstract: In a semiconductor device having a silicon carbide device, a technique capable of suppressing variation in a breakdown voltage and achieving reduction in an area of a termination structure is provided. In order to solve the above-described problem, in the present invention, in a semiconductor device having a silicon carbide device, a p-type first region and a p-type second region provided to be closer to an outer peripheral side than the first region are provided in a junction termination portion, a first concentration gradient is provided in the first region, and a second concentration gradient larger than the first concentration gradient is provided in the second region.