An operation mode selection unit selects an efficiency priority mode for minimizing the overall loss in a power supply system based on a load request voltage obtained in accordance with the condition of a load and on the conditions of DC power supplies, and generates a mode selection signal in accordance with the selection result. When SOC and/or output power have/has reached power supply restriction values in any DC power supply, an operation mode modification unit generates a final mode selection instructing signal so as to modify selection of the efficiency priority mode by the mode selection signal to select an operation mode in which power distribution between the DC power supplies can be controlled.

A system includes a converter for powering a synchronous electric machine to which it is connected by cables, an insulating device and a mechanism for short-circuiting phases of the machine. The system includes primary detectors for detecting an overcurrent in the converter and a securing device able to open the insulating device when receiving a primary detection signal emitted by the primary detector. The system also includes secondary detectors able to detect a short-circuit downstream from the insulating device and to emit a secondary detection signal toward the securing device, the latter actuating the closing of the mechanism for short-circuiting as long as they have already received a primary detection signal having led to the opening of the insulating device.

A vehicle system includes a controller configured to, responsive to an alignment mode, disable a power rectifier configured to transfer charge between a secondary coil and battery, and enable a precision rectifier to output a voltage responsive to current induced in the secondary coil resulting from current through a corresponding primary coil, and responsive to the voltage exceeding a threshold, enable the power rectifier and disable the precision rectifier.

A propulsion system for an electric vehicle comprising a high voltage battery unit having a first high voltage battery connected in series with a second high voltage battery, which may also be referred to as a first and second battery bank, and one or more power inverters arranged to connect the battery banks to one or more electric machines. The one or more power inverters and the one or more electric machines are configured to form a first and a second three-phase system. The described architecture incorporating dual battery banks, and dual and/or multiphase inverters and electric machines can provide enhanced redundancy and limp home functionality in cases where a fault or error occurs in the inverter and/or in the electric machine so that a faulty three-phase system can be operated in a safe-state mode.

An auxiliary power source device for a vehicle is incorporated in an electric vehicle and includes a three-phase inverter that converts an input DC voltage into a desired three-phase AC voltage and applies the three-phase AC voltage to a load. The auxiliary power source device further includes a filter reactor that is connected to respective output terminals of a three-phase inverter, a filter capacitor that is connected in a Y-shape at an end on a load side of the filter reactor and is not grounded at a neutral point, and a three-phase transformer that includes primary windings that are connected in a Y-shape at the end on the load side of the filter reactor and is grounded at a neutral point and secondary windings that are connected in a delta shape.

A control unit applied to a motor that includes a rotor having a field winding and a rotor having armature winding groups to control a field current passed through the field winding. Each of the armature winding groups is applied with a prescribed voltage. The field current is controlled so as to be a minimum field current value If_min with which a deviation between an amplitude of an induced voltage generated in the armature winding groups by rotation of the rotor, and an amplitude of the voltage applied to the armature winding groups becomes equal to or smaller than a prescribed value.

Methods and systems are disclosed for customizing an advanced driver assistance system (ADAS) of a vehicle. In one example, a system for an electric vehicle comprises a current sensor arranged on a power line coupling a battery of the electric vehicle with an inverter of the electric vehicle; a directional speed sensor arranged at a motor of the electric vehicle; and a high voltage direct current contactor arranged on the power line coupling the battery of the electric vehicle with the inverter, upstream of the current sensor, the high voltage direct current contactor configured to allow a current to flow from the battery to the inverter when the high voltage direct current contactor is in a closed position, and to not allow the current to flow when the high voltage direct current contactor is in an open position.

The invention relates to a system having an energy storage device and a DC voltage supply circuit, wherein the energy storage device has at least two energy supply branches, which are each coupled at a first output to at least one respective output terminal of the energy storage device in order to generate an AC voltage at the output terminals, and at a second output to a shared bus, wherein each of the energy supply branches has a plurality of energy storage modules connected in series. The energy storage modules each comprise an energy storage cell module having at least one energy storage cell and a coupling device having a coupling bridge circuit made from coupling elements. The coupling elements are designed to selectively connect the energy storage cell module to the respective energy supply branch or to bypass the energy supply branch. The DC voltage supply circuit has: a bridge circuit having a plurality of first feed terminals, each of which is coupled to one of the output terminals of the energy storage device; two feeding nodes, at least one of which is coupled to the bridge circuit; and a module-tapping circuit that has at least one module switching branch having a commutating diode. Each of the at least one module switching branches connects a coupling node between two energy storage modules of one of the energy supply branches switchably to a feeding node.

A hybrid drive system has a battery and a combustion engine for energy sources. The system has a traction motor, a generator, a variable voltage converter (VVC), a motor inverter, a generator inverter, a bus coupling the VVC to the inverters, and a controller. The controller regulates engine speed, motor torque, and generator torque. The engine speed is determined according to a driver torque demand. In normal conditions, 1) the controller regulates the engine speed by modifying a generator torque command, and 2) the bus voltage is regulated using the VVC and battery. When the controller detects a fault in which the battery and VVC become unavailable for regulating the bus voltage, then the controller regulates a motor inverter power output to match a sum of a generator inverter power output and an estimated power loss of the inverters in order to regulate the bus voltage.

Embodiments of the present invention provide a method of controlling a high-voltage circuit (15) of a vehicle, comprising detecting (310) a fault associated with the high-voltage circuit, reducing (320) a voltage of the high-voltage circuit (15) in dependence on detecting the fault, receiving (330) a torque request and, in dependence thereon, increasing (340) the voltage of the high-voltage circuit (15).