With the continuous advancement of science and technology, various industries have also made great progress. Regarding the development prospects of tailboard power switches, their demand continues to increase, and there are also many manufacturers on the market. As a manufacturer, it is necessary for us to explain the role and principle of tailboard power switches to everyone? Interested friends can take a look together.

Before using this tailboard power switch, there were also many issues that accompanied everyone, so if you want to use it better, you need to understand some of its knowledge points. First of all, you need to be aware that many people may think that the tailboard power switch is a type of switch, but in fact, this type of switch is not common in our daily lives, and we often know very little about its function. Simply put, it is to use circuits to control the switching transistor for high-speed switching. Convert direct current into high-frequency alternating current and supply it to a transformer for transformation, thereby generating one or more sets of required voltages! The main function of the tailboard power switch is to rectify and filter the input AC power into DC; Then the switching tube is controlled by a high-frequency PWM signal, and DC is applied to the primary of the switching transformer; The secondary induction of the switching transformer generates high-frequency voltage, which is rectified and filtered before being supplied to the load; The output part is fed back to the control circuit through a certain circuit to control the PWM duty cycle and achieve stable output. There is a door at the power switch on the tailboard. Power on when opening the door and power off when closing the door. So what is a door? In fact, some of its principles use thyristors, while others use switching transistors. These two components have similar performance, both relying on a pulse signal applied to the base and control electrode to complete conduction and cutoff. When the positive half of the pulse signal arrives, the voltage on the control electrode increases, and the switching transistor may turn on or off. The thyristor is turned on.

The tail board power switch is rectified by 220v, and the filtered 300v output voltage is turned on. It is transmitted to the secondary through the switch transformer, and then stepped up or down through a variable ratio to make each circuit work. At this point, what everyone needs to know is that the negative half cycle of its oscillation pulse arrives, and the voltage at the base or thyristor control electrode of the power regulation tube is lower than the original set voltage. The power regulation tube is cut off, the 300V power supply is turned off, and there is no voltage at the secondary of the switching transformer. At this point, it will be found that the required working voltage of each circuit is maintained by the discharge of the rectified filtering capacitor. Secondary circuit. When the positive half cycle signal of the next pulse cycle arrives, repeat the previous process. The tail board power switch seen here is called a high-frequency transformer because its operating frequency is higher than the low frequency of 50Hz. So how to get the pulse that drives the switching transistor or thyristor? This requires an oscillator circuit to generate. We know that a transistor has a characteristic that the base emitter voltage is 0.65-0.7V, which is in an amplifying state, and above 0.7V is in a saturated conducting state.

The above introduction is about the function and principle of the tailboard power switch. If you have any further questions, please feel free to call and inquire. That's all for today's knowledge, I hope it can be helpful to you. The next issue will bring more information related to it.