[Problem] An inverter device is provided which is capable of more quickly raising an internal temperature of an electrolytic capacitor within a permissible range of a ripple voltage to shorten a non-operating time. [Solution] The inverter device includes an electrolytic capacitor 1, an inverter circuit 2, a temperature sensor 4, and a control device 3. When the ambient temperature of the electrolytic capacitor 1 detected by the temperature sensor 4 is lower than a predetermined temperature, the control device 3 on-drives specific switching elements of the inverter circuit 2 before the start of a normal operation of a motor 5, and executes a warming up operation of allowing a current capable of controlling a ripple voltage of a DC voltage within a permissible range to flow through the motor 5 at a predetermined rate of increase while keeping the motor 5 stopped.

A drive device includes a motor, a decelerator connected to the motor, a differential connected to the motor via the decelerator, a housing that accommodates the motor, the decelerator, and the differential, an oil pump that includes a motor assembly and a pump assembly that is rotated by the motor assembly, and sends, to the motor, oil accommodated in the housing, a rotation sensor to detect rotation of the pump assembly, and a controller to control the motor. The controller limits an output of the motor based on a detection result of the rotation sensor.

An electric drive unit includes a polyphase alternating current (AC) motor, an inverter. A motor controller employs field oriented controls to achieve torque and heat production objectives for the electric drive unit. Additional heat may be generated through inverter operation control.

A traction battery heating circuit, system, and control method, and an electric device are provided. In some embodiments, the traction battery heating circuit includes: a power supply module, including at least one battery group; an inverter module, connected to the power supply module and including an M-phase leg circuit, where the leg circuit is connected in parallel to the battery group, and M is an even multiple of three; a driving module, including a motor having M windings, where the M windings are respectively connected to M phase legs of the leg circuit in one-to-one correspondence; and a control module, connected to the leg circuit, configured to control upper legs of at least three phase legs in the leg circuit and lower legs of the same number of phase legs in remaining legs to be turned on.

An electric power conversion apparatus includes a rotating electric machine including armature windings, a first inverter connecting the armature windings with a first storage battery, a second inverter connecting the armature windings with a second storage battery, a changeover switch configured to connect or disconnect between first and second positive buses or between first and second negative buses, and an operating unit configured to perform, with the changeover switch being in an ON state, first and second energization processes alternately. In the first energization process, electric current is supplied from the first storage battery to the second storage battery via the first inverter, at least one of the armature windings and the second inverter. In the second energization process, electric current is supplied from the second storage battery to the first storage battery via the second inverter, at least one of the armature windings and the first inverter.

A heat pump device includes a compressor that compresses refrigerant, a motor that drives the compressor, an inverter that applies a desired voltage to the motor, and an inverter controlling unit that generates a pulse width modulation signal for driving the inverter, has, as operation modes, a heating operation mode performing heating operation of the compressor and a normal operation mode performing normal operation of the compressor to compress the refrigerant, and periodically changes carrier frequency, that is frequency of a carrier signal, in the heating operation mode.

An electric motor includes a case, a stator having stator windings, a rotor having a rotor shaft, and at least one main rotor bearing coupling the rotor shaft to the case. Common mode charge builds up on the rotor due to imbalances of the stator. The at least one main rotor bearing has a first electrical resistance between the rotor shaft and the case. The electric motor further includes a rotor discharge bearing coupling the rotor shaft to the case. The rotor discharge bearing has a second electrical resistance between the rotor shaft and the case that is less than the first electrical resistance, causing the common mode charge to discharge through the rotor discharge bearing. In a differing embodiment, a rotor discharge brush coupled between the case and the rotor shaft along the longitudinal axis of the rotor shaft discharges the common mode charge.

A power storage device is appropriately heated in a low temperature environment, while preventing device configuration from becoming complicated, and minimizing a reduction in electric power utilization efficiency. A vehicle drive device includes a rotary electric machine that includes plurality of mutually independent coil sets each including coils of plurality of phases connected to each other, plurality of inverters that independently control respective plurality of coil sets, a power storage device, heat transfer system that transfers heat to power storage device, and control device that controls plurality of inverters. The control device performs warm-up control by performing power running control on at least one of inverters and performing regenerative control on at least another of inverters in such a manner that power running torque resulting from power running control and regenerative torque resulting from regenerative control have different absolute values so that a rotor of rotary electric machine rotates.

A power storage device is appropriately heated in a low temperature environment, while preventing device configuration from becoming complicated, and minimizing a reduction in electric power utilization efficiency. A vehicle drive device includes a rotary electric machine that includes plurality of mutually independent coil sets each including coils of plurality of phases connected to each other, plurality of inverters that independently control respective plurality of coil sets, a power storage device, heat transfer system that transfers heat to power storage device, and control device that controls plurality of inverters. The control device performs warm-up control by performing power running control on at least one of inverters and performing regenerative control on at least another of inverters in such a manner that power running torque resulting from power running control and regenerative torque resulting from regenerative control have different absolute values so that a rotor of rotary electric machine rotates.

An electric motor includes a case, a stator that includes end-windings, a rotor coupled to the case via at least one rotor bearing, at least one drive motor fluid pump, and drive motor electronics. The rotor includes a hollow cylindrical body, a first shaft portion, and a second shaft portion, a fluid feed tube having a fluid receive end and a fluid feed end, the fluid feed end extending into the hollow cylindrical body, and a plurality of fluid exit ports. The drive motor electronics power the stator with or without causing rotation of the rotor. The drive motor fluid pump pumps fluid into the hollow cylindrical body via the fluid feed tube, pumps the fluid out of the plurality of fluid ports, and onto the stator end-windings to collect heat from the rotor and the stator. The heated fluid may be used for heating a battery.