Provided are an inverter device, which is capable of preventing a malfunction of the inverter device while reducing the number of interface wirings, and a method of controlling the inverter device. A communication terminal of a communication circuit having a function of communicating to/from a vehicle, an input terminal for a start signal for starting a control circuit, and a signal for holding the control circuit active even when the start signal is changed after the start of the control circuit are used. A drive prohibition signal issued from the vehicle is received through the same terminal as that for the start signal to unify terminals for the start signal and the drive prohibition signal, to thereby reduce the number of interface wirings.

A drive power control device includes: a modeling error reduction unit configured to calculate a correction torque by performing high-pass filter processing on a correction amount calculated by a correction amount calculation unit; a control motor torque command value calculation unit configured to calculate a control motor torque command value by adding the correction torque to a motor torque command value; and a slip reduction control unit configured to perform, when the vehicle starts traveling or slip is detected, control to reduce slip by switching the cutoff frequency of a high-pass filter HPF to be low as compared with normal traveling.

A vehicle system includes a relay and coil of a contactor. The relay is configured to transfer current between a traction battery and an electrical load when closed. The system also includes a controller configured to operate a switch such that current flow from the traction battery through the coil and switch, and bypassing the relay, causes the relay to close to permit pre-charging of the load.

An electric propulsion system is described that includes an AC drive circuit, a synchronization circuit, and a control unit. The AC drive circuit includes a plurality of propulsor motors, an AC power bus, and an AC generator that delivers AC electrical power to the AC power bus for simultaneously driving the plurality of propulsor motors. The synchronization circuit is configured to synchronize, with the AC generator, single propulsor motor from the plurality of propulsor motors, at a time. The control unit is configured to maintain synchronicity between the single propulsor motor and the AC generator by engaging the synchronization circuit with the single propulsor motor in response to determining that the single propulsor motor is not synchronized with the AC generator.

A vehicle servicing method according to an exemplary aspect of the present disclosure incomes, among other things, disconnecting a high voltage battery pack of an electrified vehicle from a high voltage bus, connecting an external energy source to an inverter system controller after disconnecting the high voltage battery pack, starting an engine of the electrified vehicle using energy from an external energy source, and charging the high voltage battery pack using power from the engine.

A parallel charging and power supply system for a battery electric vehicle comprises a battery unit, a battery management system, a vehicle control unit, a motor controller and a motor, wherein a corresponding signal output end and a signal input end of the battery management system are respectively connected with a corresponding signal input end and a signal output end of the battery unit; the motor controller is respectively connected with a power output end of the battery unit, a power input end of the motor and a signal output end of the motor; a signal input end of the vehicle control unit is respectively connected with the corresponding signal output ends of the battery management system and the motor controller.

Embodiments of the invention provide a controller for a hybrid electric vehicle (HEV) having an engine and an electric machine, the controller being configured upon start-up to control an electric machine to provide torque to drive a vehicle with an engine off if a state of charge (SoC) of an energy storage device is above an EV-start SoC threshold and to start an engine if a SoC of an energy storage device is below the EV-start SoC threshold, wherein the EV-start SoC threshold is determined to be one selected from amongst a value sufficient to allow a vehicle to travel a prescribed distance before a SoC falls below a SoC minimum level at which an engine is started and a value sufficient to allow a vehicle to operate for a prescribed time period before a SoC falls below the SoC minimum level.

Embodiments of the invention provide a controller for a hybrid electric vehicle (HEV) having an engine and an electric machine, the controller being configured upon start-up to control an electric machine to provide torque to drive a vehicle with an engine off if a state of charge (SoC) of an energy storage device is above an EV-start SoC threshold and to start an engine if a SoC of an energy storage device is below the EV-start SoC threshold, wherein the EV-start SoC threshold is determined to be one selected from amongst a value sufficient to allow a vehicle to travel a prescribed distance before a SoC falls below a SoC minimum level at which an engine is started and a value sufficient to allow a vehicle to operate for a prescribed time period before a SoC falls below the SoC minimum level.

A launch control system and method for an electric vehicle, which are capable of satisfying a driver's demand for a high-performance vehicle by realizing the high performance of the electric vehicle. The system and method maximize acceleration at an initial stage of launching the electric vehicle from a standstill, thereby shortening the time to reach the maximum acceleration when launching the electric vehicle from the standstill.

A system and method of controlling a vehicle that has an axle assembly and a wheel. Propulsion torque and friction brake torque are simultaneously provided to the wheel with an electric motor and a friction brake, respectively, when braking and acceleration of the vehicle are both requested for a predetermined period of time.