Method for determining carrier frequency of motor driver or controller and related assembly

The invention discloses a carrier frequency determination method of a motor driver or a controller and a related component, and relates to the field of carrier frequency determination, the current output frequency of the driver is acquired, and the target carrier frequency of the driver is determined according to the current output frequency and the corresponding relation between the preset output frequency and the carrier frequency; the target carrier frequency is determined according to the energy utilization efficiency of the driving system where the driver is located, the temperature rise of the driver, the riding comfort parameter of the vehicle where the driver is located and the like. The corresponding relation between the output frequency and the carrier frequency is established, and different carrier frequencies are determined according to different output frequencies, so that the energy utilization rate of the driving system can be improved, the capacity of a driver can be improved, the calorific va