Motor stalling heating control method, controller assembly and electric vehicle

The invention discloses a motor stalling heating control method, a controller assembly and an electric vehicle, and belongs to the technical field of motor control. When the motor is subjected to locked-rotor heating, the locked-rotor heating current output by the motor is controlled to be circularly switched between at least two current working points, so that three phases of the motor are uniformly heated; wherein the current working points are determined according to a torque range interval of the motor and an output power demand of the motor and are distributed on two sides of a d axis in a preset dq coordinate system, and the torque range interval is an interval formed by an equal torque line of the motor surrounding the d axis; any torque in the torque range interval is smaller than or equal to the maximum torque allowed to be output by the motor, and the vehicle is kept in a static state when the maximum torque allowed to be output by the motor, so that the locked-rotor heating current output by the mo