Three-function automatically switched matching power supply

Abstract

The invention relates to a three-function automatically switched matching power supply and belongs to the technical field of electronics. The three-functions automatically switched matching power supply comprises a DC rectification unit, an AC rectification unit, a switch lightning protection unit, an AC operating unit, an AC backup unit, a load unit, a storage battery, a charging unit, an isolation unit, a conversion control unit, and a silicon controlled rectifier (SCR) conversion unit. The OR-gate diodes of the two rectification units are connected to the switch lightning protection unit. The switch lightning protection unit is formed by a lightning protection relay and a lightning protection voltage-stabilizing tube connected in series. The lightning protection voltage-stabilizing tube generates protection during overvoltage. The AC rectification unit output supplies current to an AC power supply unit and the conversion control unit. The DC rectification unit output supplies current to the charging unit. When the load unit is connected and AC power is provided, the conversion control unit is started and the SCR conversion unit is switched off so as to achieve an AC power supply circuit. When no AC power is provided, the conversion control unit is cut off and the SCR conversion unit is activated so as to achieve a DC power supply circuit. A three-terminal integrated circuit supplies power in a normal state. The three-function automatically switched matching power supply has all advantages of a three-terminal integrated circuit.

Description

technical field [0001] The invention belongs to the field of electronic technology. Background technique [0002] 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, they still cannot meet the ever-changing needs. [0003] For example, the company has applied for several products related to security equipment. The products of these devices have very high requirements on the power supply, which is far higher than that of ordinary household appliances, and the traditional design scheme is not competent. The reasons are as follows: [0004] One is that the power supply is often an electrical appliance, the key part that is most likely to fail, and it is the same for ordinary household appliances. This is espec...

AI Technical Summary

Problems solved by technology

Difficulty 5. Some materials propose to use relays for switching. This scheme has many shortcomings. One of the important shortcomings is power consumption. Difficulty 6 is that some schemes are too expensive to be popularized.

Images