Working principle of relay voltage regulator

The working principle of the relay voltage regulator is mainly based on the voltage reduction of the transformer, the voltage stabilization of the voltage regulator tube, and the control switching function of the relay. Here's a detailed explanation of how it works:

Transformer step-down: First, the relay-type voltage regulator reduces the input AC power voltage to a suitable value through a built-in transformer. This step is to ensure that the subsequent voltage stabilization process can be carried out in a lower, more easily controllable voltage range.

Voltage stabilization of the voltage regulator tube: Next, the characteristics of the voltage regulator tube are used to stabilize the voltage after being stepped down by the transformer at a predetermined value. The voltage regulator tube is an electronic component that can maintain the stability of the output voltage. It can automatically adjust its resistance value according to changes in the input voltage to maintain the stability of the output voltage.

Relay-controlled switch: On the basis of stabilizing the voltage of the voltage regulator tube, the relay-type voltage regulator realizes the switching of the circuit through the control of the relay. A relay is an electromagnetic switch that can change its switching state under the action of a control signal. In a relay-type voltage regulator, a relay is used to control the output voltage on and off to achieve voltage stabilization.

Output voltage control: When the input voltage or load changes, the relay will change its switching state according to the change in control signal, thereby adjusting the output voltage. Specifically, when the input voltage increases, the relay opens the circuit and reduces the output voltage; when the input voltage decreases, the relay closes the circuit and increases the output voltage. In this way, the relay regulator can control the output voltage within a stable range.

It should be noted that although relay-type voltage regulators have the advantages of simple structure and low cost, their voltage stabilization accuracy and response speed are relatively low, and they may not be able to meet the needs of some high-precision and high-demand circuits. Therefore, when selecting a voltage regulator, you need to choose the appropriate type based on specific circuit requirements and application scenarios.