Brief Analysis of the Working Principle of AC Voltage Stabilizer Circuit

There are many types of AC voltage stabilizers, and the working principles of the main circuits are different, but basically (except for AC parameter voltage stabilizers) they are composed of input switch sampling circuits, control circuits, voltage regulation devices, output protection devices, drive devices and displays, and their basic working principles are the same.

Working Principle of AC Voltage Stabilizer Circuit

1. Input switch: As the input working switch of the voltage stabilizer, a small air switch type circuit breaker with limited current protection is generally used to protect the voltage stabilizer and electrical equipment.

2. Voltage regulator: A device that can adjust the output voltage. Raising or lowering the output voltage is the most important component of the voltage regulator.

3. Sampling circuit: detect the output voltage and current of the regulator, and transmit the output voltage changes to the control circuit.

4. Driving device: Since the control electrical signal of the control circuit is weak, a driving device is required for power amplification and conversion.

5. Drive protection device: A device that connects and disconnects the output of the voltage regulator, usually a relay, contactor or fuse.

6. Control circuit: Analyze the sampled circuit detection model. When the output voltage is high, send a control signal to reduce the voltage to the drive device, and the drive device will drive the voltage regulator to lower the output voltage. When the output voltage is low, send a control signal to increase the voltage to the drive device, and the drive device will drive the voltage regulator to increase the output voltage, so as to stabilize the output voltage and achieve the purpose of stable output.

When it is detected that the output voltage or current exceeds the control range of the voltage regulator, the control circuit will control the output protection device to disconnect the output to protect the electrical equipment. Under normal circumstances, the output protection device is connected to the output, and the electrical equipment can get a stable voltage supply.