Switched reluctance motor is a speed control device that can control the size of the starting current. The usual speed control method is the current chopping control method. It is not understood by professionals who see it. Next, this article will introduce you in detail.
When the switched reluctance motor starts or runs at low speed (below 40% of the rated speed), the speed is slow, the moving electromotive force is small, and the di/dt is large. In order to prevent possible overcurrent and large current spikes, this system adopts limited by current chopping. The power tube switch is turned on, and the current rises. When the current rises to the upper limit of the chopping current, the winding current is cut off, and the current drops. When the current drops to the lower limit of the chopping current, the power tube switch is turned on again, and the current rise again. Repeatedly turning on and off the power tube switch forms a chopper current that fluctuates around a given current value.
The parameters of the low-speed control mode of the switched reluctance motor mainly include the turn-on angle, turn-off angle, main circuit voltage and phase current, which are easier to understand with the introduction of the article.
Post time: May-04-2022