Power supply harmonic suppressor with buffer protection circuit

Abstract

The invention discloses a power supply harmonic suppressor with a buffer protection circuit and is used for solving the problems that an existing alternating-current power supply harmonic suppressor does not have a voltage stabilizing function, the filtering principle of the LC filtering circuit is reflection, and the interference still exists in the circuit. The power supply harmonic suppressor with the buffer protection circuit comprises a rectifying circuit, a buffer protection circuit, an LC filter circuit and a second filter circuit. the power supply harmonic suppressor with the buffer protection circuit forms a harmonic suppression circuit to suppress electromagnetic noise and clutter signals of an input power supply, so that power supply interference is prevented, and meanwhile, power grid interference caused by high-frequency clutters generated by the power supply is prevented; the alternating current is converted into direct current through a rectifier U1, the direct current voltage output by the rectifier U1 is more stable through a voltage stabilizing diode VD, and a magnetic bead L3 is connected with a LC filter circuit in series, so that the reflection function of theLC filter circuit is exerted, and the absorption function of the magnetic bead L3 on ripple and noise interference is fully utilized.

Description

technical field [0001] The invention relates to the technical field of power supply harmonic suppressors, in particular to a power supply harmonic suppressor with a buffer protection circuit. Background technique [0002] In recent years, the high-tech industry has become increasingly prosperous, and various electronic products (such as computers) are used more frequently in daily life. Since electronic products contain many electronic components, each electronic component will generate a large amount of electromagnetic wave interference (EMI), especially at the power supply end of the electronic product. A large amount of electromagnetic wave interference not only seriously interferes with the operation of each electronic component itself, but also seriously interferes with the circuits in electronic products, and may even cause damage or failure of electronic products. When the electromagnetic wave interference of electronic products is serious, it will also cause abnorma...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a power supply harmonic suppressor with a buffer protection circuit, which is used to solve the problem that the existing AC power harmonic suppressor itself has no voltage stabilization function and adopts LC filtering, because the filtering principle of the LC filter circuit is Reflection, interference will still exist in the circuit problem

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