1
What is?
permanent magnet synchronous motor and DC motor structure is similar to the magnetic field system of permanent magnets by one or more components. Compared to other types of motors, permanent magnet synchronous motor biggest advantage is that compared to other types of motors, at the same mass and volume, permanent magnet synchronous motor to provide greater power output and the acceleration of the vehicle.
2
advantages
– the same power output premise volume of the permanent magnet synchronous motor is smaller and lighter. Weight reduction can achieve the effect of reducing energy consumption, smaller also means more space can contribute to the car, to improve ride comfort.
· DC motor with a similar structure, also has a simple structure, reliable operation, power density characteristics. Different drive system which uses superior noise control on the DC motor and speed properties.
3
drawbacks
· limited performance permanent magnetic material on the rotor permanent magnetic materials at high temperatures, vibration and over-current situation, will produce the phenomenon of demagnetization.
· In the more complex conditions, by the strong shock produces permanent magnet material crushedCrack, the damage caused by the permanent magnet motor.
– the higher the price of permanent magnetic materials, so that the entire motor and control system cost is relatively high.
4
Principle
by a magnetic system consisting of one or more permanent magnets, usually It is a squirrel-cage rotor of an internal welded cast aluminum or copper strip, the desired number of poles of the permanent magnet poles lined apparatus. When the stator winding is powered, the principle of the asynchronous motor starter motor is moving forward, when the acceleration operation to the synchronous speed, the synchronous electromagnetic torque generated by the permanent magnetic field and the stator field pull-in rotors the rotor, the motor into the synchronous operation.