Provided are embodiments for a braking system, where the system includes a controller, a motor coupled to an H-bridge network, a DC link coupled to the motor, and an electrical braking system electrically coupled to the motor. The electrical braking system includes a sense circuit configured to sense a condition of the DC link, a brake resistor coupled to the DC link, a drive circuit coupled to the sense circuit, and a transformer for regeneration. Also, provided are embodiments of a method for operating an efficient regenerative resonance electrical braking system.

A vehicle includes an electric machine, an IGBT, and a gate driver. The IGBT has a gate, an emitter, and a collector and is configured to flow an electric charge through a phase of the electric machine. The gate driver is configured to flow current onto the gate at a first level, and in response to a time integral of a voltage across the phase exceeding a predetermined level, transition from the first level to a second level less than the first level.

Motor drive with a T-type filter with at least two three-phase differential mode reactors and three capacitors, wherein at least one of the three-phase differential mode reactor comprises an auxiliary coil (6) wound around three wound core elements (2.1, 2.2, 2.3) such that the common mode current is induced in the auxiliary coil (6).

Exhaust gases from an engine, input to turbo-compounder, drive a bladed turbine rotor therein, which drives a multi-phase AC generator, the output of which is used to electrically drive a multi-phase induction motor, the rotor of which is mechanically coupled to the engine, so as to provide for recovering power to the engine. The multi-phase AC generator may be coupled to the engine either by closure of a contactor, engagement of an electrically-controlled clutch, or by control of either a solid-state switching or control system or an AC excitation signal, when the frequency (f.sub.GENERATOR) of the multi-phase AC generator meets or exceeds that (f.sub.MOTOR) of the multi-phase induction motor.

In a power source system, a high-voltage battery and a low voltage battery are configured to store electric powers to be supplied to a traveling motor and an accessory, respectively. A step-up unit is interposed between the low-voltage battery and the traveling motor, and is configured to step up a voltage of the low-voltage battery and apply the stepped-up voltage to the traveling motor. A controller is configured to perform switching to a normal-time electric power supply circuit, in which the high-voltage battery and the traveling motor are coupled to each other, when the high-voltage battery is in a normal state and perform switching to an abnormal-time electric power supply circuit, in which the low-voltage battery and the traveling motor are coupled to each other via the step-up unit, when the high-voltage battery is in an abnormal state.

A power system includes: a first power circuit, having a first battery; a second power circuit, having a second battery, wherein a used voltage range of the second battery with respect to a closed circuit voltage overlaps with the first battery, and a static voltage of the second battery is lower than the first battery; a voltage converter, converting a voltage between the power circuits; a power converter, converting power between the first power circuit and a driving motor; and a management ECU and a motor ECU, operating the power converter based on required power. The management ECU and the motor ECU calculates limit power with respect to output power of the first battery based on an internal state of the second battery, and operates the power converter so that the output power of the first battery does not exceed the limit power.

An electric winding exchanger system increases torque or speed performance of multi-phase electric motors and electric drive modules. The system includes an electronic control unit, a back electromotive force (EMF) boosting circuit, a plurality of high-voltage terminals, an electric motor, and a motor control unit. The electronic control unit receives and processes commands from the motor control unit. The back EMF boosting circuit adjusts the winding arrangements of the electric motor in order to change the state of the electric motor. The plurality of high-voltage terminals transfers high voltage electrical energy from the back EMF boosting circuit to the electric motor and vice versa. The motor control unit allows a user to input commands in order to activate increased torque or speed performance for the electric motor. The electric motor is preferably a multi-phase electric motor of an electric or hybrid vehicle.

A drive control method is applicable to a drive system including a driver, a bus and a motor, the motor being directly connected to the bus in a first connection mode or connected to the driver in a second connection mode. The drive control method includes the driver feeding an electric signal to the motor through the output port and simultaneously detecting its own actual output feature; and the driver determining whether the output port is connected to the bus according to the actual output feature. Upon the output port being determined not to be connected to the bus, the driver starts the motor normally. Upon the output port being determined to be connected to the bus, the driver disconnects the output port. In addition, a corresponding drive system, a processing system and a storage medium are disclosed.

A circuit for converting single phase power to three phase power and method of operation that automatically starts upon detection of a demand for three phase power from a three phase load connected to the circuit.

An arrangement contains an asynchronous machine having a rotor and a stator. The arrangement is set up in a generator mode for feeding electrical energy into an AC voltage network. The arrangement is characterized in that the asynchronous machine can be doubly fed. The asynchronous machine can be connected in a matrix configuration to the AC voltage network by a modular multi-level converter, and the modular multi-level converter is set up in a motor mode of the arrangement for starting up the asynchronous machine while short-circuiting the rotor or the stator.