Upon the city power passing through the input switch to connect the transformer, which converts the city power voltage to the designed voltage, it enters the pre-regulation circuit. The pre-regulation circuit is designed to initially stabilize the required output voltage, aiming to reduce the voltage drop across the input and output of the high-power adjustment tube, minimizing the power loss.

We have reduced the power consumption of the adjustable voltage regulators, improving the efficiency of DC power supplies. The pre-regulator power supply typically utilizes thyristor phase-shifting relays to switch transformer taps for voltage stabilization.

The voltage obtained after pre-regulation through a power supply and filter is essentially stable. The relatively low ripple direct current, after passing through a control circuit that governs a high-power adjustable tube, is subjected to precise and rapid voltage topping. This results in a direct current voltage with stable voltage accuracy and performance that meets the standard, which is then filtered through a filter.

Afterward, the required output direct current is obtained.

To achieve the desired output voltage or steady current value, we must sample and test the output voltage and current, then transmit them to the control and protection circuit.

4. The control and protection circuit compares the detected output voltage and current values with the values set by the voltage and current setting circuit; after analysis, it drives the pre-regulation circuit and the high-power adjustment tube, ensuring that the DC regulated power supply can output the voltage and current values we have set.

5. Additionally, when the control protection circuit detects abnormal voltage or current values, the protection circuit will be activated, putting the DC power supply into a protective state.