An illustrative dual power inverter module includes a detection circuit configured to detect loss of low voltage DC electrical power supplied to a controller for a first power inverter and a second power inverter of a drive unit for an electric vehicle. A first backup power circuit is associated with the first power inverter and a second backup power circuit is associated with the second power inverter. Each backup power circuit is configured to convert high voltage DC electrical power to low voltage DC electrical power responsive to detection of loss of low voltage DC electrical power supplied to the controller. Three-phase short circuitry is configured to apply a same fault action to the first power inverter and the second power inverter responsive to detection of loss of low voltage DC electrical power supplied to the controller, wherein the same fault action includes applying equalized torque to each axle operatively coupled to the drive unit.

To provide a hybrid wheel loader capable of reliably detecting a short-circuited state of a synchronous generator driven by a drive source. The present invention is provided with an MG 4 being a synchronous generator driven as an electric generator by an engine and operated as a motor by the electric power supplied from an electrical storage device 9, an MG inverter 5 having a motor current sensor 5d for detecting motor current flowing through the MG 4 and semiconductor switches 5a, 5b, and an HCU 10 for detecting a short-circuited state of the MG 4, wherein the HCU 10 determines that the MG 4 is in a short-circuited state when the semiconductor switches 5a, 5b of the MG inverter 5 are in an OFF state at gates and when the motor current detected by the motor current sensor 5d is equal to or greater than a specified threshold value.

A vehicle-side, electronic charging device of a wireless battery charging system receives, converts and feeds energy into a rechargeable traction battery of an electric vehicle traction motor. The traction battery is charged by an external charging system via a wireless link and the vehicle-side charging device. The vehicle-side charging device includes a first LC resonant circuit between first and second output ports, and a current rectifier having first and second AC voltage inputs and first and second DC voltage outputs. Either (i) the first and second DC voltage outputs of the current rectifier, or (ii) the first and second AC voltage inputs of the current rectifier, or (iii) the first and the second output ports of the first LC resonant circuit, or (iv) a first and a second connection of the reception coil are switchably connected to one another via an actuable kill switch.

A failure sign determining device includes an acquirer to acquire pieces of sensor data based on respective values measured by multiple sensors, an FFT processor to execute fast Fourier transform on each of the pieces of sensor data and thereby generate a piece of frequency spectrum data, and a determiner to determine the existence of a failure sign on the basis of comparison between the piece of frequency spectrum data and a spectrum range defined for the sensor. The determiner, only when determining that a failure sign exists, transmits at least either of the piece of frequency spectrum data and the piece of sensor data to an analysis apparatus.

A motor control device includes a motor drive circuit including an upper arm and a lower arm, an arithmetic processor to control the motor drive circuit, an alternative circuit that can operate as a substitute to replace the arithmetic processor, and a mode switch to switch a control mode between a first control mode, in which the arithmetic processor controls the motor drive circuit, and a second control mode, in which the alternative circuit controls the motor drive circuit, based on a state of the arithmetic processor. The mode switch switches the control mode from the first control mode to the second control mode when a state of the arithmetic processor changes from a normal state to an abnormal state.

An electric vehicle includes a controller configured to receive sensor feedback from a high voltage storage device and from a low voltage storage device, compare the sensor feedback to operating limits of the respective high and low voltage storage device, determine, based on the comparison a total charging current to the high voltage storage device and to the low voltage storage device and a power split factor of the total charging current to the high voltage device and to the low voltage device, and regulate the total power to the low voltage storage device and the high voltage storage device based on the determination.

A vehicle powertrain includes an electric machine, an inverter including an IGBT having a gate configured to flow current through a phase of the electric machine, and a gate driver. The gate driver is configured to supply power onto the gate via a voltage regulated source, and in response to a collector current of the IGBT exceeding a previous steady state current through the phase, transition to a current regulated source to drive the gate. The gate driver may be configured to delay the transition by a predetermined time that is based on a difference between the previous steady state current and a reverse recovery peak current.

A power control system for a propulsion system of a vehicle includes an energy storage system including a precharge circuit and one or more battery packs. A DC-DC converter is connected to the energy storage system and including a first capacitor, a first plurality of power switches and an inductor. A power inverter module is connected to the DC-DC converter and including a second capacitor and a second plurality of power switches. A controller is configured to pre-charge the first capacitor of the DC-DC converter and the second capacitor of the power inverter module and control operating modes of the DC-DC converter and the power inverter module.

Systems and methods for driving a motor of an electric vehicle using a secondary battery are disclosed. A vehicle may include a first battery module having a first operating voltage configured to drive the motor, a second battery module having a second operating voltage lower than the first operating voltage, and a bidirectional converter. The controller may be configured to detect a thermal parameter exceeding a predetermined magnitude while the vehicle is in a parked position, and in response modify a supply voltage of the first battery module, and thereafter to drive the electric motor using electrical power supplied by the second battery module, thereby moving the vehicle from the parked position.

A movable power generating system for a vehicle may include an inverter for receiving power from a battery in a vehicle to generate AC power, a motor for receiving the AC power from the inverter, a switch block connected to the output terminal of the inverter and for branching the AC power, and an external power supply unit connected to the switch block and for outputting the AC power.