Motor controller, heating method of power battery pack and power assembly

The invention provides a motor controller, a heating method of a power battery pack, a power assembly and an electric vehicle, and relates to the technical field of electric vehicles. The input end of the motor controller is used for being connected with a power battery pack, the output end of the motor controller is used for being connected with a motor, and the motor controller comprises an inverter and a controller. Wherein the input end of the inverter is used for being connected with the input end of the motor controller, and the output end of the inverter is used for being connected with the output end of the motor controller; the inverter is used for converting direct current input by the power battery pack into three-phase current and transmitting the three-phase current to the motor; and the controller is used for controlling the working state of the inverter according to the current required heating power of the motor and the current required output torque of the motor so as to adjust the three-phas