Abstract: Systems and methods for operating an electric drive system for an electric or hybrid vehicle is described. In one example, the drive system is operated by suppling a pulsed torque current command while supplying a zero flux current command. The torque current command and the flux current command make up winding current commands for an electric machine.

Abstract: A drive arrangement comprising an electric motor can be operated. The drive arrangement comprises the electric motor, an electrical circuit for operating the electric motor, and a control device for actuating the electrical circuit; wherein the electric motor has at least one stator comprising at least three coils and a rotor comprising at least two magnetic poles; wherein the electrical circuit has at least a first potential connection and a second potential connection, which can be connected to different potentials of a DC voltage source; wherein the electrical circuit comprises three half-bridges between the potential connections, wherein each coil is electrically conductively connected to each half-bridge via a respective first connection and to the other coils via a respective second connection.

Abstract: A system for calibrating inductance at a motor comprises the motor, a motor drive circuit, and a processor operably coupled to the motor. The processor determines inductance map data that comprises a set of inductance values associated with a set of current values. The processor determines that the motor is in operation. In response, the processor determines current values with which the motor is being operated. The processor determines inductance values associated with the determined current values. The processor determines reference current values at the motor based on the determined inductance values. The processor also determines a speed, angle, flux, and torque associated with the motor based at least on the determined inductance values. The processor then controls the operation of the motor based on the determined reference currents, the speed, and the torque.

Abstract: A method comprises applying a driver voltage to an electrostatic comb drive of an MEMS apparatus and overlaying the driver voltage with a periodic voltage signal. The method further comprises determining a torsion angle of a mirror body of the MEMS apparatus based on the periodic voltage signal.

Abstract: An information processing device includes a command analysis unit configured to analyze a tendency of a command instruction for accessing a controller for each of applications, and a command delivery arbitration unit configured to arbitrate delivery of commands to the controller based on an analysis result by the command analysis unit.

Abstract: A position control apparatus detects currents of processing object phases which flow through the three-phase AC motor, applies offset compensation processing to current detected values of the processing object phases based on offset compensation amounts, and controls the three-phase AC motor based on the current detected values of the processing object phases after the offset compensation processing. Processing of obtaining the offset compensation amounts includes processing of obtaining a Fourier coefficient of a frequency component of a torque ripple based on a torque command value signal, processing of obtaining torque amplitude components of the processing object phases, and processing of obtaining the offset compensation amounts with respect to the processing object phases based on the torque amplitude components of the processing object phases.

Abstract: In a motor current optimization control method and system, while the motor runs steadily at a set speed, one d-axis current command value of the input current is set to 0. Then, the d-axis current command value is step-wisely increased by an increment at least twice. At least three real-time feedback current values can be collected from detecting a feedback current of an AC power. When an instant detected is smaller than the previous detected, the d-axis current command value is increased. When the instant detected is greater than the previous detected, the d-axis current command value corresponding to the previous detected is a minimum feedback current value and is defined as the optimized d-axis current command value. The optimized d-axis current command value is set as the d-axis current command value of the input current to control the motor to keep running steadily at the set speed.

Abstract: Provided is a motor controller that can estimate the magnetic flux of a magnet without changing a current of an electric motor. A motor controller 1 includes a current detecting unit 15 that detects a current of an electric motor 5, a current stability determining unit 10 that determines whether or not a current detected by the current detecting unit 15 is stable, and a magnetic flux calculating unit (filters 8a to 8e, a current conversion unit 4b, a resistance calculating unit 9, a magnet magnetic flux estimating unit 11) that based on a determination made by the current stability determining unit 10 as to current stability, calculates the magnetic flux of a magnet of the electric motor 5, according to a voltage equation in a rotating coordinate system, to output the calculated magnet flux.

Abstract: A mobile robot (1) for providing a mobile robot that prevents the output current of a battery from exceeding the rated current due to inrush current of an electric load comprises a voltage acquisition unit (11) for acquiring the voltage of a battery (21) for supplying electric power to a manipulator (31), a condition determination unit (12) for determining whether the voltage is in a specific range, and a starting control unit (13) for disabling starting of the manipulator (31) when the voltage is determined to be in the specific range. The specific range is a voltage range that is a portion of the voltage range in which the manipulator (31) can be operated.

Abstract: One aspect of a motor control device of the present invention is a motor control device that controls a three-phase motor, the motor control device including a drive circuit that converts DC power supply voltage into three-phase AC voltage and supplies the three-phase AC voltage to the three-phase motor, a voltage detection unit that detects terminal voltage of three phases of the three-phase motor, and a control unit that detects a point at which induced voltage appearing in each terminal voltage of the three phases intersects a predetermined zero-cross determination level as a zero-cross point, and controls the drive circuit based on a detection result of the zero-cross point. The control unit changes a value of the zero-cross determination level when the induced voltage of at least one of the three phases increases and when the induced voltage of at least one of the three phases decreases.

Abstract: In one embodiment, the method includes i) obtaining target data specifying desired operating parameters of a switched reluctance motor, ii) obtaining data indicative of a value of a measured drive current for each of the phase outputs of an associated inverter, iii) converting the measured drive current values from a stationary reference frame into reference current values in a rotating reference frame, iv) generating, based on the reference current values and the target data and the set of inductance values, updated reference voltage values in the rotating reference frame, v) converting the updated reference voltage values from the rotating reference frame into updated voltage values in the stationary reference frame, and vi) controlling the inverter to set the voltages of the phase outputs to the updated voltage values.

Abstract: A method of operating a heating, ventilation, and air conditioning (HVAC) system including: transmitting, using an equipment control board, an operation request in a pulse width modulation (PWM) signal to an electronically commutate motor (ECM) controller of a blower motor, wherein the operation request includes a switching period command configured to vary a switching period of the PWM signal; operating the blower motor in accordance with the operation request by varying the switching period of the PWM signal; detecting a parameter of the blower motor for each of a plurality of switching periods as the switching period varies; and mapping the parameter of the blower motor for each of the plurality of switching periods.

Abstract: A variable frequency starter generator (VFSG) system includes a VFSG having a start mode and a generate mode, a permanent magnet generator (PMG) and a main generator section and an exciter section. The system also includes a controller electrically connected to the VFSG. The controller flow start mode three phase electrical power from aircraft power to the exciter of the VFSG in the start mode and flows single phase electrical power to the exciter of the VFSG in the generate mode. The controller includes: an input active rectifier that receives input AC power and converts it to DC power and provides it to across a positive rail and negative rail; an output inverter coupled to an output of the input active rectifier; and one or more line inductors connected along one or both of the positive rail and negative rail between the input active rectifier and the output inverter.

Abstract: A control system for a fuel cell vehicle includes a driving motor of the fuel cell vehicle, a brake system of the fuel cell vehicle, and a controller configured to derive a required target regenerative braking torque when the fuel cell vehicle rolls in an opposite direction to a traveling direction on a slope and, when an available regenerative braking torque of the driving motor is less than the required target regenerative braking torque, control the brake system to generate braking torque by as much as a difference between the required target regenerative braking torque and the available regenerative braking torque.

Abstract: An electrified vehicle includes: a battery; a motor drive device configured to drive a motor through an inverter, based on a voltage of the battery; and a battery controller configured to determine whether to perform output limiting on the battery, based on whether a ratio of regenerative braking is less than or equal to a preset ratio, wherein the ratio of regenerative braking is varied according to an amount of charging of the battery and an amount of discharging of the battery within a preset time interval, and adjust, based on the output limiting being performed on the battery, a derate ratio associated with a battery output limit value.

Abstract: A ventilation blower includes an inverter main circuit, a motor body driven by the main circuit, a control circuit that controls the main circuit, and a storage device. The storage device stores an angular velocity of a motor rotor and a torque current value at a first operation point at which to obtain a first air volume on a first load characteristic, and the angular velocity and the torque current value at a second operation point at which to obtain a second air volume on the load characteristic, the second air volume being different from the first air volume. The control circuit calculates, from the angular velocities and the torque current values at the first and second operation points, the angular velocity and the torque current value at a third operation point at which to obtain a third air volume on the load characteristic.

Abstract: A current detection device includes a current detection unit configured to detect current flowing through a switching element of a lower-side arm; a correction value calculation unit configured to calculate an offset correction value, based on a detection value of the current detected by the current detection unit in a period during which the switching element off during PWM control, and to hold and update the calculated offset correction value; and a correction unit configured to correct, by the offset correction value held by the correction value calculation unit, the detection value of the current detected by the current detection unit in a period during which the switching element is on. The correction value calculation unit is configured to not update the offset correction value in a case where a duty ratio of the PWM control is equal to or less than a duty ratio lower limit value.

Abstract: A motor controller that is operable to control a motor includes drive current generation circuitry having an output coupled to the motor. The motor controller further includes a velocity control path. The velocity control path includes angular velocity estimation circuitry having an input adapted to be coupled to the motor, a velocity comparator having first input coupled to a target velocity input and a second input coupled to an output of the angular velocity estimation circuitry, and an adaptive velocity controller having a first input coupled to an output of the velocity comparator and having an output coupled to a first input of the drive current generation circuitry. The motor controller further includes controller parameter determination circuitry having a first input coupled to the output of the angular velocity estimation circuitry and having an output coupled to a second input of the adaptive velocity controller.

Abstract: A method to suppress tonal noises over a wide speed range in an alternating current electric machine by current injection and voltage injection is provided. The method includes, within a computerized processor, monitoring a position sensor measuring a current electric machine frequency of the electric machine, comparing the current electric machine frequency to a sampling frequency of the position sensor, and operating one of a current injection mode and a voltage injection mode to suppress the tonal noises in the electric machine based upon the comparing.

Abstract: An electric circuit for an electric motor. The electric motor having has at least one stator with at least three coils and a rotor with at least two magnetic poles. The motor is operable by the electric circuit at least in the following two states: a) in a first state, the coils can each be energized with different currents of a three-phase system and the rotor can be set into rotation about an axis of rotation; b) in a second state, the coils can be energized with an in-phase alternating current.