Various disclosed embodiments include illustrative drive unit controllers, drive units, and vehicles. In an illustrative embodiment, a drive unit controller includes a first component configured to receive heat request and vehicle status information. A second component is configured to initiate a battery heat generation mode responsive to the received heat request and the vehicle status information.

Various disclosed embodiments include illustrative drive unit controllers, drive units, and vehicles. In an illustrative embodiment, a drive unit controller includes a first component configured to receive heat request and vehicle status information. A second component is configured to initiate a battery heat generation mode responsive to the received heat request and the vehicle status information.

A system includes: a motor having a stator and a rotor; and a pulse generation circuit coupled to the stator. The system also includes a motor controller coupled to the pulse generation circuit. The motor controller is configured to: determine inductance and resistance values of the motor based on timing parameters obtained during an initial position detection (IPD) interval; determine a rotor position based on the determined inductance and resistance values; and generate control signals for the pulse generation circuit based on the determined rotor position.

A motor unit comprises a switch circuit and a control unit. The switch circuit comprises a first terminal and a second terminal, where the switch circuit is coupled to a motor for driving the motor. The first terminal has a first voltage signal. The control unit generates a plurality of control signals to control the switch circuit. When the first terminal is in a floating state, the motor unit utilizes left-right asymmetry of the first voltage signal to judge whether the motor is in a forward rotation state or not. The motor unit further comprises the motor, where the motor comprises a rotor, a silicon steel plate, and a coil. The silicon steel plate has an asymmetrical structure.

A motor unit comprises a switch circuit and a control unit. The switch circuit comprises a first terminal and a second terminal, where the switch circuit is coupled to a motor for driving the motor. The first terminal has a first voltage signal. The control unit generates a plurality of control signals to control the switch circuit. When the first terminal is in a floating state, the motor unit utilizes left-right asymmetry of the first voltage signal to judge whether the motor is in a forward rotation state or not. The motor unit further comprises the motor, where the motor comprises a rotor, a silicon steel plate, and a coil. The silicon steel plate has an asymmetrical structure.

A system includes: a motor having a stator and a rotor; and a pulse generation circuit coupled to the stator. The system also includes a motor controller coupled to the pulse generation circuit. The motor controller is configured to: determine inductance and resistance values of the motor based on timing parameters obtained during an initial position detection (IPD) interval; determine a rotor position based on the determined inductance and resistance values; and generate control signals for the pulse generation circuit based on the determined rotor position.

A method for adapting the control parameters of an electric traction machine being a permanent magnetic synchronous motor, PMSM, the method comprising providing the flux linkage of the permanent magnets, PM flux, in the PMSM; performing a stand still characterisation of the PMSM to estimate linked magnetic flux as a function of current; adding the PM flux to the estimated linked magnetic flux to provide a flux characteristic of the PMSM; adapting the control parameters of the PMSM based on the flux characteristic.

A method for adapting the control parameters of an electric traction machine being a permanent magnetic synchronous motor, PMSM, the method comprising providing the flux linkage of the permanent magnets, PM flux, in the PMSM; performing a stand still characterisation of the PMSM to estimate linked magnetic flux as a function of current; adding the PM flux to the estimated linked magnetic flux to provide a flux characteristic of the PMSM; adapting the control parameters of the PMSM based on the flux characteristic.

This motor control device controls a motor having a first stator winding, a second stator winding, and a field winding whose response to a current command is slower than those of the first stator winding and the second stator winding, and includes: a parameter acquisition unit which acquires motor state data and a motor parameter corresponding to the motor state data; and a current command calculation unit which calculates current commands for the windings on the basis of a torque command for the motor and the motor parameter. The current command calculation unit includes a response delay reproduction unit which reproduces response delay of field winding current in a field winding current command, and calculates a first stator winding current command and a second stator winding current command, using the field winding current command in which the response delay is reproduced.

An electric motor control device, capable of suppressing a torque ripple even when electrical characteristics on a motor have errors or variations, comprises: a fundamental electric-current instruction generator for outputting d-axis and q-axis fundamental electric-current instructions for outputting fundamental torque from the motor having saliency; a position dependency component generator for outputting a position dependency component(s) of the motor according to its rotational position; an electric current correction instruction calculator for calculating d-axis and q-axis current correction instructions from the d-axis and q-axis fundamental electric-current instructions, and the position dependency component(s); an electric current correction instruction superposition unit for generating d-axis and q-axis current instructions by performing superposition of the d-axis and q-axis current correction instructions on the d-axis and q-axis fundamental electric-current instructions; and an electric current controller for controlling a current to flow through the motor by an inverter, based on the d-axis and q-axis current instructions.