Switched reluctance motor structure than any other kind of motor should be simple, there is no slip ring in the motor rotor, windings and permanent magnets, etc., but in the stator has a simple concentrated winding, the winding ends are short, no phase Jumper, easy to maintain and repair. Thus reliability, speed up to 15000 r / min. Efficiency up to 85% ~ 93%, higher than the AC induction motor. The main losses in the stator, the motor easy to cool; rotor permanent magnets, easy to achieve a variety of special requirements of the torque-speed characteristics, but also to maintain a wide range of high efficiency. More suitable for electric vehicle power performance requirements.

Switched reluctance motor also has wide speed and torque range of efficient operation, flexible control, four-image operation, fast response, low cost and so on. Good processability, suitable for high speed, environmental adaptability; motor torque direction and the direction of the winding current has nothing to do; for frequent start and stop and forward and reverse conversion operation; start current, torque; controllable parameters, Good speed regulation performance; strong regenerative braking ability; the stator and rotor materials are made of silicon steel sheet, easy to get and recycling.

However, switched reluctance motor torque fluctuations, the need for position detectors, the system nonlinear characteristics of the magnetic field for the jump rotation, the control system is complex; the DC power supply will have a great pulse current and other shortcomings. The position detector is the key component of the switched reluctance motor, and its performance has an important influence on the control operation of the switched reluctance motor. As the switched reluctance motor is a double-salient pole structure, there is inevitably a torque ripple. Noise is the most important drawback of the switched reluctance motor. However, researches in recent years show that the noise of switched reluctance motor can be well suppressed with reasonable design, manufacture and control technology. In addition, due to large fluctuations in the output torque of the switched reluctance motor, the DC current of the power converter also fluctuates greatly, so a large filter capacitor needs to be installed on the DC bus.

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