A motor control device includes a motor drive circuit and a microcomputer that controls the drive circuit. The microcomputer generates a control signal on the basis of duty command values Du, Dv, and Dw to control the drive circuit. The microcomputer includes a dead time compensation section that corrects the duty command values Du, Dv, and Dw on the basis of dead time compensation values Ddu, Ddv, and Ddw. The dead time compensation section includes a basic compensation value computation section that computes a basic compensation value Dd as a fundamental value of the dead time compensation values Ddu, Ddv, and Ddw, and a filter section that performs a filtering process corresponding to a low-pass filter on the basic compensation value Dd. The dead time compensation section sets the dead time compensation values Ddu, Ddv, and Ddw on the basis of an output value α from the filter section.

A filter processor of a control apparatus for a rotary electric machine filters target torque for the rotary electric machine to suppress a vibrational frequency component of a drivetrain using a filter having a frequency transfer characteristic. A controller performs drive control of the rotary electric machine according to the filtered target torque. A parameter calculator calculates, according to a running condition of the vehicle, a parameter associated with a request value for responsivity of output torque of the rotary electric machine with respect to the target torque. A variable setter variably sets the frequency transfer characteristic of the filter to decrease a degree of attenuation of the vibrational frequency component with an increase of the request value for the responsivity of the output torque.

A rotating electric machine includes a stator having a stator coil and a rotor provided rotatably around a specific rotation axis with respect to the stator. The rotor includes a plurality of magnets, a plurality of magnetically-assisted salient pole members provided between poles of any adjacent two magnets from among the plurality of magnets, and a magnetoresistance variation unit provided in the magnetically-assisted salient pole member along an axial direction of the rotation axis at a position offset in a circumferential direction of the rotation axis from a q-axis passing through a salient pole center of the magnetically-assisted salient pole member. The amount of offset of the magnetoresistance variation unit from the q-axis varies depending on positions of the magnetically-assisted salient pole members so that torque fluctuations cancel each other when power is applied.

A control method for a battery cooling system of a vehicle which is provided for controlling temperature of a battery module by using a refrigerant supplied to a chiller in the battery cooling system may include (A) determining, by a controller, whether an air conditioner is operated, while driving or stopping the vehicle in a state where the vehicle is started, (B) controlling, by the controller, a first expansion valve, and detecting, by the controller, the temperature of the battery module when the controller determines that the air conditioner is operated, and (C) determining, by the controller, selective operation of a second expansion valve through determining whether the temperature of the battery module, which is detected through the controlling in (B), is within a predetermined range.

A battery assembly includes, among other things, an upper tier tray, an upper battery module supported on the upper tier tray, and a post that supports the upper tier tray. A battery module support method according to another exemplary aspect of the present disclosure includes, among other things, supporting an upper tier tray with a post; and supporting an upper battery module with the upper tier tray.

Pulsed control of electric motors, and more particularly, to selectively adjusting one or more of a pulsing frequency, an amplitude of the pulses and/or a duty cycle of the pulses for reducing Noise, Vibration and Harshness (NVH) while maintaining high levels of operating efficiency.

A drive upper limit electrical energy for an air compressor is set variably in correspondence with vehicle velocity Vv. In this manner, for example, surplus power generation electrical energy of a fuel cell stack is consumed (discarded) by the air compressor in a range where NV (noise and vibration) of the air compressor does not give passengers any sense of discomfort.

The quietness requirement level of a charging point is determined based on the position information on the charging point where an in-vehicle battery is fast charged by an external power supply. For an air conditioner that cools the in-vehicle battery through a drive power of an electric compressor when the in-vehicle battery is charged, an upper limit of a rotation speed of the electric compressor is set in such a way that the upper limit of the rotation speed of the electric compressor is set lower when the in-vehicle battery is charged by the external power supply at a charging point where the quietness requirement level is equal to or higher than a predetermined value than when the in-vehicle battery is charged by the external power supply at a charging point where the quietness requirement level is lower than the predetermined value.

The invention relates to a method for controlling an inverter which is electrically connected to an electric motor, having the following steps: defining a modulated voltage (S1) for the inverter, said voltage being based on a first switching frequency, for operating the electric motor with a current, wherein the current has an electric frequency; determining the electric frequency (S2); changing the first switching frequency (S4) on which the modulated voltage is based to a second switching frequency if a value pair consisting of electric frequency and first switching frequency, or a value pair consisting of electric frequency and a sideband of the first switching frequency, is within at least one defined disturbance range (S3).

A method for controlling a tone of an electric vehicle (EV) based on motor vibration may include: calculating an order component from a vibration signal of an EV motor of an electric vehicle, extracting a first order component with the greatest linearity for motor output torque among the calculated order component, then calculating an order frequency by transforming revolutions per minute (RPM) of the EV motor into frequency, setting an EV mode tone by applying a vibration level of the first order component to a level of the order frequency to be output and rearranging the order component, and outputting the set EV mode tone, and may apply an LMS filter algorithm, FFT/IFFT transforms, and an order tracking algorithm in extracting the first order component.