Switched reluctance motor
The reluctance motor is a new type of motor with no windings or permanent magnets on the rotor, but a solid structure with salient poles stacked from silicon steel sheets. It is based on the principle of minimum magnetoresistance (the flux is always closed along the path with the smallest reluctance). By switching the order of energization of the windings on the salient poles of the stator, the rotor is continuously moved to the position where the reluctance is the smallest, thereby driving the rotor to rotate.
The magnetoresistive structure is simple and sturdy, reliable in operation, low in cost, and has great potential for development. Therefore, in recent years, the development of the traction speed regulation field has been quite rapid, but due to its inherent torque fluctuation, the vibration noise is obvious. Only used in some passenger cars.
At present, there are some new hybrid excitation reluctance motors, usually inserting a certain ferrite permanent magnet material into the rotor reluctance groove, so that the performance of the motor is higher than that of the reluctance motor because a part of the permanent magnet torque is introduced. And the cost is not as high as that of rare earth permanent magnet motors.
