Power supply of electrical equipment

Abstract

The invention discloses a power supply of electrical equipment, which comprises an alternating current input circuit, an electromagnetic interference filter circuit, a boosting rectification filter circuit, a direct current chopping pulse width modulation circuit, a transformer circuit, a synchronous rectification filter circuit, and a two-way direct current voltage stabilization output circuit, wherein the alternating current input circuit is connected with an external alternating current power supply; the electromagnetic interference filter circuit is connected with the alternating current input circuit; the boosting rectification filter circuit is connected with the electromagnetic interference filter circuit; the direct current chopping pulse width modulation circuit is connected with the boosting rectification filter circuit; the transformer circuit is connected with the direct current chopping pulse width modulation circuit; the synchronous rectification filter circuit is connected with the transformer circuit; and the two-way direct current voltage stabilization output circuit is connected with the synchronous rectification filter circuit. According to the power supply of the electrical equipment, as the two-way direct current voltage stabilization output circuit is adopted, output voltage is not affected by load easily, the stability and reliability are higher, the rectification efficiency can be improved with the adoption of the synchronous rectification circuit, the greater power output can be supported, the power can be stably supplied for various loads, and the normal operation of loads such as the electrical equipment can be ensured.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a power supply for electrical equipment. Background technique [0002] In recent years, with the improvement of people's living standards, household electrical appliances such as televisions, video cameras, and cameras have become more and more popular in people's daily life and life, and various electrical appliances have become an indispensable part of people's lives. [0003] For various electrical equipment, it is usually necessary to be connected to a power supply. For the current power supply circuit, a secondary side feedback regulation type SSR circuit structure and a primary side feedback regulation type PSR circuit structure are usually used. [0004] Among them, for the secondary-side feedback regulation SSR circuit structure, it needs to use more electronic components, the production cost is high, and the electromagnetic compatibility is not good. It needs to ...

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Problems solved by technology

[0004] Among them, for the secondary-side feedback regulation SSR circuit structure, it needs to use more electronic components, the production cost is high, and the electromagnetic compatibility is not good. It needs to design complex electromagnetic interference EMI filter circuit for supporting filtering, so the market competitiveness Poor, affecting widespread adoption in the market

[0005] As for the PSR circuit structure with primary side feedback adjustment, it has the problem of weak load capacity, which is currently only suitable for low-power regulated power supply circuits below 10W, and the stability of the output voltage is poor, and the output voltage is easy to change with the load. Significant changes occur due to changes, seriously affecting the performance of the power supply

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