SCR quick-break type multi-point detection and protection power supply

Abstract

A silicon controlled rectifier quick-break type multipoint detection protection power supply belongs to the electronic technology field, and is jointly composed of a lightning arrester, a front-end overvoltage protection starting unit, a loop diode, an overcurrent monitoring unit, an overcurrent display unit, an overcurrent protection starting circuit, a loop sampling unit, a quick-break protection unit, a quick-break starting response unit, a protection starting unit, a rear-end overvoltage adjustable unit, a rear-end overvoltage control unit, a fault caution effect unit and a three-end voltage stabilizing circuit. In the overcurrent monitoring unit, an NPN triode is used for current amplification and and is in series connection in a main channel to monitor the loads. The quick-break protection unit is in series connection with the input of the three-end voltage stabilizing circuit and forms the active prompting and quick-break protection to a total power supply and the loads when the overvoltage faults are generated at the rectification output and at the three-end voltage stabilizing output. The active prompting adopts an acousto-optic coexistence effect, so that the silicon controlled rectifier quick-break type multipoint detection protection power supply of multipoint monitoring and protection effect coexistence is formed, and accordingly, the development of a power supply electronic line is promoted.

Description

technical field [0001] The invention belongs to the field of electronic technology. Background technique [0002] Power supply is an old topic, because from the first day of electronic circuits, the research on power supply began, because all electronic circuits must require power supply to work. [0003] The power supply is also a fresh topic, because today, with the rapid development of electronic technology, the technology is constantly being updated, and new power supplies that meet the needs of various developments are needed. Therefore, the research on power supply has always been the focus of social research. [0004] The voltage regulator is an important part of electronic products, and its excellent performance is directly related to the overall performance, so there are many excellent voltage regulator integrated circuits, such as 78 series, 79 series and so on. Although the above-mentioned integrated series have many advantages, it is a popular voltage stabilizi...

AI Technical Summary

Problems solved by technology

Otherwise, you can’t watch TV. It’s highly suggestive and can be restored immediately. However, security products are relatively difficult, because after the power is turned off, it’s not easy to visually remind them, and they can only rely on memories. However, in a high-paced life, it is easy to forget and become a blank for security.

[0007] 2. Although there are lightning arrester products, I understand that it is difficult to buy those whose absorption and penetration are within 100 volts, let alone within 30 volts (the current 78 series, the input voltage can only be 30 volts)

However, security products require fixed-point maintenance

And this kind of maintenance needs to be rushed, so how can we accurately judge whether the fault occurs, whether it is a power supply or a load?

[0009] 4. In addition to lightning strikes, the fluctuation of the power grid is also an important reason why electronic products are easily damaged, so it is necessary to have a stronger adaptability

[0010] 5. It is particularly important that the security device cannot be monitored reliably and accurately

[0014] 2. It can only monitor and protect a certain aspect of a certain point. For example, it can only monitor and protect current or voltage, but cannot achieve comprehensive monitoring and protection of coexistence of current and voltage.

[0015] 3. It can only monitor or protect one aspect of the fault area, such as the overvoltage protection caused by external factors (lightning strike and mains power), or the overcurrent protection caused by the load, but it cannot realize the problem of the power supply itself. And the resulting monitoring and protection (because the power supply is often the key area of ​​fault generation), so it is impossible to achieve multi-faceted, that is, multi-point joint monitoring and multiple protection

[0016] 4. In the monitoring performance, the coexistence of light and sound cannot be realized, so the prompting is not strong, and the maintenance personnel cannot quickly and accurately judge the area where the fault occurs according to the instructions.

[0017] 5. Lack of fast response, the threshold value of overvoltage protection is flexible and adjustable

[0018] 6. Lack of unification of comprehensiveness and price, a unified line of multiple advanced effects and operability

[0020] Due to the above reasons, the existing materials are difficult to solve the 5 problems raised

Images