An electric drive system includes a battery pack, a power inverter module (PIM), an electric machine, a switching circuit, and a controller. The electric machine has three or more phase legs. The PIM has a DC-side connected to the battery pack, and an alternating current (AC)-side connected to the electric machine. The switching circuit includes AC switches, and for each phase leg also includes three or more winding sections each electrically connectable to or disconnectable from the battery pack and PIM via the AC switches. The controller commands a binary switching state of each respective AC switch based on the rotary speed to implement one of three different speed-based operating modes of the electric machine, and to thereby vary a conductive path from the PIM to the electric machine through one or more of the connected winding sections.

A coaxial propulsion system is provided, which comprises a housing, and two or more electric motors provided in the housing, wherein the electric motors share one common shaft. At least one of the two or more electric motors is a permanent-magnet synchronous motor, an asynchronous motor or a switched reluctance motor, and of different efficiency maps. The system can improve the power density and system efficiency of propulsion system while maintaining high performance output, to enhance the integration level, and reduce size, weight and cost.

Systems and methods for operating a vehicle that includes an engine and an electric machine are described. In one example, a speed of the engine may be adjusted so that the engine provides power to drive the electric machine without generating numerous rapid engine speed changes in a short amount of time.

A rotor for an electric machine includes pairs of magnets with a bridge region therebetween. Lamination that comprise the rotor may define openings in the bridge region between the magnets of each of the pairs. A clip may be installed in the openings and a bonding material may fill the remainder of the bridge region.

A vehicle electric machine assembly including a stator core and a terminal block is provided. The stator core includes one or more three-phase terminals connected to end windings. The terminal block includes a connector for each of the three-phase terminals. A portion of the end windings extending from the stator core, the three-phase terminals, and the terminal block are overmolded as a single unit such that a portion of each of the connectors is exposed for connection to an inverter. The terminal block may further include one or more threaded apertures, each sized to receive a threaded stud to facilitate an electrical connection between one of the one or more three-phase terminals and the inverter. Each of the one or more three-phase terminals may extend axially along an axis substantially parallel to a central axis of a rotor disposed within a cavity defined by the stator core.

A drive device (102) with a converter function for a vehicle (100) has at least one first motor connection and one second motor connection for connecting the drive device (102) to a converter (108), a least one first motor coil and one second motor coil, wherein a first connection of the first motor coil is connected to the first motor connection and a first connection of the second motor coil is connected to the second motor connection, at least one first intermediate tap and one second intermediate tap, wherein the first intermediate tap is connected to a first tap point of the first motor coil and the second intermediate tap is connected to a first tap point of the second motor coil, and at least one first supply line connection and one second supply line connection for connecting the drive device (102) to an AC voltage supply line, wherein the first supply line connection is connected to the first intermediate tap and the second supply line connection is connected to the second intermediate tap.

A synchronous machine drive control device such that a rotation angle correction amount can be detected even when a synchronous machine is rotating at high speed, and the rotation angle correction amount can be detected over a wide range, is obtained. A rotation angle correction amount calculation unit that calculates a correction amount of a rotation angle of a synchronous machine is included in an inverter control device, and the correction amount of the rotation angle is calculated based on a current detected by a current sensor by a three-phase short circuit being implemented in a state wherein the synchronous machine is rotating.

An electrified vehicle includes a transmission system including a differential and an electrically powered heating device configured to selectively warm a differential fluid of the differential. The electrically powered heating device is selectively powered to warm the differential fluid.

A method and a system for controlling a motor for a vehicle are provided. The vehicle is capable of being continuously driven by controlling the motor based on position information of a rotor derived using a sensorless estimation algorithm in the event of a failure of a position sensor of a motor rotor while the vehicle is being driven.

A control system includes a power inverter configured to convert direct current (DC) power into alternating current (AC) power, an electric motor configured to be driven using the AC power output by the power inverter, and a controller configured to control the AC power by performing switching between multi-pulse control and one-pulse control on the basis of electric power loss of the electric motor and the power inverter and noise of the electric motor, the controller being a control device configured to control the power inverter.