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Switching power supply

A switching power supply, switching circuit technology, applied in electrical components, output power conversion devices, AC power input into DC power output and other directions, can solve the problem of large feedback control error of switching power supply circuit, achieve accurate reference voltage, reduce Loss and error reduction effect

Inactive Publication Date: 2016-11-23
钟燏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] What the present invention needs to solve is the problem that the feedback control error of the existing switching power supply circuit is large, and provides

Method used

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  • Switching power supply

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with embodiment.

[0024] A switching power supply, such as figure 1 As shown, it includes input module, transformation module, output module and control module. The input terminal of the input module is connected to the mains, and the output terminal is connected to the input terminal of the conversion module; the output terminal of the conversion module is connected to the input terminal of the output module; the output terminal of the output module is the output terminal of voltage and current; the input terminal of the control module It is connected with the output end of the output module, and the output end is connected with the transformation module.

[0025] The input module includes an input filter circuit, a surge suppression circuit and an input rectification circuit. The input end of the input filter circuit is connected with the mains; the output end of the input filter circuit is connec...

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Abstract

The invention provides a switching power supply and relates to the field of power supplies. The switching power supply comprises an input module, a transformation module, an output module and a control module. The input module comprises an input filtering circuit, a surging suppression circuit and an input rectifying circuit; the transformation module comprises a switching circuit and a transformer; the output module comprises an output rectifying circuit and an output filtering circuit; the control module comprises a power correcting circuit, a protection circuit, a sampling circuit, a reference power supply, a comparison and amplification circuit, a V / F circuit, an oscillator and a base electrode driving circuit.

Description

technical field [0001] The invention relates to the field of switching power supplies, in particular to a switching power supply. Background technique [0002] Switching power supply is a kind of power supply that uses modern power electronic technology to control the time ratio of switching on and off to maintain a stable output voltage. In order to improve the power factor and avoid harmonic pollution, the switching power supply is usually equipped with a front-stage power factor correction circuit and a rear-stage DC-DC conversion circuit to jointly complete the power conversion. [0003] When the switching power supply is working, when the switching tube in the power factor circuit is turned off, energy is injected into the energy storage capacitor, and when the switching tube in the power factor circuit is turned on, it stops storing energy in the energy storage capacitor; the conversion circuit When the switching tube in the conversion circuit is turned on, it absorbs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/217H02M1/08
CPCH02M7/217H02M1/08
Inventor 钟燏
Owner 钟燏
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