An oil supply device for an electric vehicle powertrain apparatus, includes an electric oil pump, a motor lubrication flow path connected to the electric oil pump and provided to supply oil from the electric oil pump to a bearing of a motor, a motor cooling flow path branched from the motor lubrication flow path to supply oil for cooling the motor from the electric oil pump, and a cooling control valve apparatus provided in the motor cooling flow path to control oil supplied to the motor through the motor cooling flow path according to an operating state of the electric oil pump.

An oil supply device for an electric vehicle powertrain apparatus, includes an electric oil pump, a motor lubrication flow path connected to the electric oil pump and provided to supply oil from the electric oil pump to a bearing of a motor, a motor cooling flow path branched from the motor lubrication flow path to supply oil for cooling the motor from the electric oil pump, and a cooling control valve apparatus provided in the motor cooling flow path to control oil supplied to the motor through the motor cooling flow path according to an operating state of the electric oil pump.

Disclosed is a motor, a control method, a power system, and an electric vehicle. Each phase stator winding of the motor includes two sub-winding sets. When a traction battery needs to be heated, the two sub-winding sets of the motor store electrical energy and provide alternating currents to the traction battery through an inverter, so that the traction battery uses its internal resistance for heating. In addition, the two sub-winding sets generate opposite magnetic fields which cancel each other out, so that the strength of the magnetic field inside each phase stator winding and the air gap magnetic flux are reduced, thereby alleviating the heat generation and NVH problems of the motor.

Disclosed is a motor, a control method, a power system, and an electric vehicle. Each phase stator winding of the motor includes two sub-winding sets. When a traction battery needs to be heated, the two sub-winding sets of the motor store electrical energy and provide alternating currents to the traction battery through an inverter, so that the traction battery uses its internal resistance for heating. In addition, the two sub-winding sets generate opposite magnetic fields which cancel each other out, so that the strength of the magnetic field inside each phase stator winding and the air gap magnetic flux are reduced, thereby alleviating the heat generation and NVH problems of the motor.

A short-circuit fault-tolerant control method based on deadbeat current tracking for a five-phase permanent magnet motor with a sinusoidal back-electromotive force or a trapezoidal back-electromotive force (EMF) is provided. By fully utilizing a third harmonic space of a five-phase permanent magnet motor in a fault state, the method proposes a fault-tolerant control strategy for a five-phase permanent magnet motor with a sinusoidal back-EMF or a trapezoidal back-EMF in case of a single-phase short-circuit fault. The method enables the five-phase permanent magnet motor to make full use of the third harmonic space during fault-tolerant operation, thereby improving the torque output of the motor in a fault state and improving the fault-tolerant operation efficiency of the motor. The method achieves desirable fault-tolerant performance and dynamic response of the motor, and expands the speed range of the motor during fault-tolerant operation.

A fluid apparatus includes a hydraulic machine, a rotary electric machine connected to the hydraulic machine, and a power conversion controller that converts power from the rotary electric machine. A non-normal operation is performed in a warning state that differs from a normal state in which a normal operation is continued and an anomalous state in which operation is stopped to continue a stopped condition.

A method for determining a state of an electric motor having a stator (2) and a rotor (3) rotatably mounted relative to the stator (2) is disclosed. Due to a rotary motion of the rotor (3), a pressure difference (p) relative to an environment (15) of the electric motor (1, 1′, 1″, 1′″) is caused in an air space (16) inside the electric motor (1, 1′, 1″, 1′″). Here, in a normal state of the electric motor (1, 1′, 1″, 1′″), the pressure difference depends on an actual rotational speed (n) of the rotor (3). A corresponding electric motor suitable for carrying out this method is disclosed, wherein the electric motor may be part of a fan.

A power tool includes a power a motor, a driver circuit, a capacitor, a capacitor switch, a temperature detection unit, and a controller. The capacitor is configured to filter out current spikes in a power supply. The capacitor switch is configured to control a working state of the capacitor. The temperature detection unit is configured to detect a temperature of a related object. The controller is configured to: acquire the temperature of the related object; control the capacitor switch to be in a first on or off state such that the capacitor works in a first working state when the temperature is lower than a temperature threshold; and control the capacitor switch to be in a second on or off state such that the capacitor works in a second working state when the temperature is higher than the temperature threshold.

A power tool includes a power a motor, a driver circuit, a capacitor, a capacitor switch, a temperature detection unit, and a controller. The capacitor is configured to filter out current spikes in a power supply. The capacitor switch is configured to control a working state of the capacitor. The temperature detection unit is configured to detect a temperature of a related object. The controller is configured to: acquire the temperature of the related object; control the capacitor switch to be in a first on or off state such that the capacitor works in a first working state when the temperature is lower than a temperature threshold; and control the capacitor switch to be in a second on or off state such that the capacitor works in a second working state when the temperature is higher than the temperature threshold.

An electric propulsion system includes a rotary electric machine having an output member, a rechargeable energy storage system (“RESS”) connected to the electric machine, a user interface device, and a controller. The RESS includes multiple battery modules and a switching circuit, the latter being configured, in response to electronic switching control signals, to connect the battery modules in a parallel-connected (“P-connected”) configuration or a series-connected (“S-connected”) configuration, as a selected battery configuration. The user interface device receives an operator-requested drive mode signal indicative of a desired drive mode of the electric propulsion system. The controller, which is programmed with mode-specific electrical losses associated with the desired drive mode, establishes the selected battery configuration in response to the drive mode signal, and presents a drive mode recommendation via the user interface device when the losses associated with the desired drive mode exceed a calibrated loss threshold.