An object of the present disclosure is to provide a trench gate type power semiconductor device that does not easily break even when stress is applied. A SiC-MOSFET includes a SiC substrate, a drift layer of a first conductive type, formed on the SiC substrate, a base region of a second conductivity type formed in a surface layer of the drift layer, a source region of the first conductivity type selectively formed in a surface layer of the base region, a trench extending through the base region and the source region and reaching the drift layer, a gate electrode embedded in the trench and having a V-shaped groove on an upper surface thereof, and an oxide film formed on an upper surface including the groove of the gate electrode, in which a bottom of the V-shape groove is deeper than the base region.

A motor driving apparatus of driving a motor including a plurality of windings respectively corresponding to a plurality of phases is disclosed. The motor driving apparatus includes a first inverter including a plurality of first switching elements and connected to a first end of each of the windings, a second inverter including a plurality of second switching elements and connected to a second end of each of the windings, and a controller electrically connected to the first switching elements and the second switching elements and configured to generate limited pole voltage commands for space vector pulse width modulation based on preset voltage commands of the motor and to distribute the limited pole voltage commands to generate first pole voltage commands for switching of the first switching elements and second pole voltage commands for switching of the second switching elements.

An electrical system can include a rechargeable energy storage system (RESS) and a power inverter connected to the RESS. The power inverter can be configured to provide electrical power to a traction motor. The electrical system includes a plurality of machine windings connected between a plurality of first switches and the traction motor. Each switch of the plurality of first switches is configured to transition between a closed state to allow current flow between the power inverter and the traction motor. The electrical system includes a plurality of inductor windings connected between a plurality of second switches and an off-board power source. Each switch of the plurality of second switches is configured to transition between a closed state to allow current flow between the off-board power source and the power inverter to charge the RESS.

An electrical system can include a rechargeable energy storage system (RESS) and a power inverter connected to the RESS. The power inverter can be configured to provide electrical power to a traction motor. The electrical system includes a plurality of machine windings connected between a plurality of first switches and the traction motor. Each switch of the plurality of first switches is configured to transition between a closed state to allow current flow between the power inverter and the traction motor. The electrical system includes a plurality of inductor windings connected between a plurality of second switches and an off-board power source. Each switch of the plurality of second switches is configured to transition between a closed state to allow current flow between the off-board power source and the power inverter to charge the RESS.

The object of the invention is a method of controlling a permanent-magnet synchronous or synchro-reluctant three-phase rotary machine (4), comprising the following steps: measuring a current (i.sub.A, i.sub.B, i.sub.C) flowing through each phase of a stator of rotary machine (4); first calculating, by use of a single proportional-integral controller, a switching control signal for controlling an inverter (10), according to each measured current (i.sub.A, i.sub.B, i.sub.C), and of a target value (T.sub.ref) of a mechanical torque provided by the rotary machine (4) or of a target value of an angular speed of a rotor of rotary machine (4) in relation to the stator wherein the inverter (10) is configured to convey electrical energy between a continuous electrical energy source (8) and each phase of the stator of rotary machine (4); and
controlling the inverter (10) by use of the calculated switching control signal.

A sigma delta (SD) pulse-width modulation (PWM) loop includes a loop filter implementing a linear transfer function to generate a loop filter signal, wherein the loop filter is configured to receive an input signal and a first feedback signal and generate the loop filter signal based on the input signal, the first feedback signal, and the linear transfer function; and a hysteresis comparator coupled to an output of the loop filter, the hysteresis comparator configured to receive the loop filter signal and generate a sigma delta PWM signal based on the loop filter signal, wherein the first feedback signal is derived from the sigma delta PWM signal.

A sigma delta (SD) pulse-width modulation (PWM) loop includes a loop filter implementing a linear transfer function to generate a loop filter signal, wherein the loop filter is configured to receive an input signal and a first feedback signal and generate the loop filter signal based on the input signal, the first feedback signal, and the linear transfer function; and a hysteresis comparator coupled to an output of the loop filter, the hysteresis comparator configured to receive the loop filter signal and generate a sigma delta PWM signal based on the loop filter signal, wherein the first feedback signal is derived from the sigma delta PWM signal.

The present disclosure relates to the technical field of vehicles, and provides a vehicle and an energy conversion device and a control method therefor. The energy conversion device includes a motor controller, a bus capacitor, a first switch module, a motor, and a second switch module. By controlling the first switch module and the second switch module to be turned on/off, a motor driving circuit can be formed by a battery pack, the first switch module, the bus capacitor, the motor controller, and the motor, and a charging and discharging circuit can be formed by the battery pack, the second switch module, the motor, the motor controller, and the bus capacitor.

The present disclosure relates to the technical field of vehicles, and provides a vehicle and an energy conversion device and a control method therefor. The energy conversion device includes a motor controller, a bus capacitor, a first switch module, a motor, and a second switch module. By controlling the first switch module and the second switch module to be turned on/off, a motor driving circuit can be formed by a battery pack, the first switch module, the bus capacitor, the motor controller, and the motor, and a charging and discharging circuit can be formed by the battery pack, the second switch module, the motor, the motor controller, and the bus capacitor.

The present disclosure relates to a motor assembly and a method for controlling the motor assembly. The motor assembly is characterized by comprising: a stator having a plurality of slots; a first coil and a second coil isolated from the first coil, the first and second coils being wound on each of the plurality of slots such that three-phase alternating currents are applied thereto; a rotor rotated by rotation magnetic fields generated by the first coil and the second coil; a first inverter unit for controlling the three-phase alternating current which is applied to the first coil in order to generate the rotation magnetic field; and a second inverter unit for controlling the three-phase alternating current which is applied to the second coil in order to generate the rotation magnetic field. Control signals for turning on and off the three-phase alternating currents applied to the first coil and the second coil are generated so as to be left-right symmetric by the first inverter unit and the second inverter unit during a preset switching cycle.