Switched reluctance motor is a speed-regulated motor developed after DC motor and brushless DC motor, and is widely used in household appliances, aviation, aerospace, electronics, machinery and electric vehicles. The switched reluctance motor has a simple structure; the motor has a simple structure and low cost, and can be used for high-speed operation. The structure of the switched reluctance motor is simpler than that of the squirrel-cage induction motor. Its rotor has high mechanical strength and can be used for high-speed operation (such as tens of thousands of revolutions per minute).
Switched reluctance motor is a speed-regulated motor developed after DC motor and brushless DC motor, and is widely used in household appliances, aviation, aerospace, electronics, machinery and electric vehicles.
The main features of the switch reluctance motor speed control system:
Simple structure; the motor has simple structure and low cost, and can be used for high-speed operation. The structure of the switched reluctance motor is simpler than that of the squirrel-cage induction motor. Its rotor has high mechanical strength and can be used for high-speed operation (such as tens of thousands of revolutions per minute). As for the stator, it has only a few concentrated windings, so it is easy to manufacture and the insulation structure is simple.
The circuit reliability of the switched reluctance motor; the power circuit is simple and reliable. Since the motor torque direction has nothing to do with the winding current direction, that is, only one phase winding current is required, the power circuit can realize one power switch per phase. Compared to the asynchronous motor windings which require bidirectional current, the PWM inverter power circuit that supplies them requires two power devices per phase. Therefore, the switched reluctance motor speed control system requires fewer power components and a simpler circuit structure than the pulse width modulation inverter power supply circuit. In addition, in the power circuit of the PWM inverter, the two power switch tubes in each bridge arm directly straddle the DC power supply side, which is likely to cause a direct short circuit to burn out the power device. However, each power switching device in the switched reluctance motor speed control system is directly connected in series with the motor winding, which fundamentally avoids the phenomenon of straight-through short circuit. Therefore, the protection circuit of the power supply circuit in the speed control system of the switched reluctance motor can be simplified , the cost is reduced, and the reliability is high.
Post time: Mar-15-2022