Comparison between excitation motor and asynchronous motor

The application of excitation motors and asynchronous motors in new energy vehicles has its own characteristics. Excitation motors have higher power density and efficiency due to the controllability of their excitation current. At the same time, neither has magnetic steel, so there is no risk of demagnetization, and the high-speed loss is low. However, there are more factors to consider in the design and manufacturing process of excitation motors, including the wear of carbon brushes, copper loss of the excitation circuit, and the adjustment of the excitation current. These factors all affect the performance and service life of the motor.