According to the market investigation and analysis, in every limousine, permanent magnet motor 59, general need 20 - in the car30. Automobile energy saving, on the other hand, is taken seriously increasingly, the modern car requires the use of motor to improve the performance and efficiency, a flat disc structure, to reduce the space, increase output, remove the spark interference, reduce noise, prolong life, easy to centralized control, the specialty of brushless dc motor, car with a brush dc motor is expected to have been replaced by permanent magnet brushless dc motor. In electric cars, electric motorcycles, electric bicycles and other traffic tools in the brushless dc motor will be the main power of driving motor, electric vehicles for the purpose of environmental protection, the traction drive motor with permanent magnet brushless dc motor is the most development prospects, among them, the built-in permanent magnet brushless motor, also known as hybrid permanent magnet magnetic resistance motor, the motor on the basis of the permanent magnet torque superposition of the magnetic resistance torque, the existence of the magnetic resistance torque to improve the overload capacity of the motor and power density, and easy to weak magnetic speed regulating, expanding the scope of the constant power operation, suitable for electric cars, high efficiency, high density and wide speed traction drive motor, they have been in Japan and the United States of large motors used in the design of new models.
