Working Principle Of Automatic Voltage Regulator

The working principle of an automatic voltage regulator mainly achieves smooth voltage regulation by changing the turns ratio of the primary and secondary coils. The regulator usually adopts the structure of an adjustable self coupling transformer, and the carbon brush tightly matches the polished surface of the coil under the pressure of the spring. By rotating the shaft to drive the brush holder, the carbon brush slides along the surface of the coil, thereby changing the contact position of the carbon brush and changing the turns ratio of the primary and secondary coils, ultimately achieving smooth adjustment of the output voltage within the adjustment range. ‌