How to say "power switch" in English?

The power switch is a high-speed switch tube through the control circuit, which converts direct current into high-frequency alternating current and provides it to the transformer for transformation, thus generating one or more groups of required voltages.

There is a door on the power switch. When the door is open, the power supply will pass through, and when the door is closed, the power supply will stop. So what is a door? Some switching power supplies use silicon controlled rectifier, while others use switch tube. The performance of these two elements is almost the same, and they are both turned on and off by adding pulse signals to the base and control electrode (thyristor). When the pulse signal arrives within half a week, the voltage on the control electrode will rise, and the switch tube or thyristor will be turned on from 300vv.

It is transmitted to the secondary through the switching transformer, and then the voltage is raised or lowered through the transformation ratio to make each circuit work. When the negative half cycle of the oscillation pulse comes, the voltage at the base of the power regulating tube or the thyristor control electrode is lower than the original set voltage, the power regulating tube is turned off, the 300v power supply is turned off, and there is no voltage at the secondary side of the switching transformer. At this time, the working voltage required by each circuit is maintained by the discharge of the filter capacitor rectified by the secondary circuit.

Extended data:

Function of switch

1. AC power input enters DC after rectification and filtering;

2. The switching tube is controlled by high frequency pwm (pulse width modulation) signal, and the DC is added to the primary of the switching transformer;

3. The secondary of the switching transformer induces high-frequency voltage, which is provided to the load through rectification and filtering;

4. The output part is fed back to the control circuit through a certain circuit to control the pwm duty ratio, so as to achieve the purpose of stable output.

References:

Baidu encyclopedia-power switch