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Capacitance decompression AC-DC switch power source

A capacitor step-down, switching power supply technology, applied in the conversion equipment without intermediate conversion to AC, the irreversible AC power input is converted into DC power output and other directions, which can solve the problem of large waveform distortion at the AC power supply end.

Inactive Publication Date: 2009-07-08
ZHEJIANG YUANCHUANG ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This circuit is only suitable for half-wave rectification circuits, the waveform distortion of the AC power supply is relatively large, and the DC output terminal is not isolated from the AC input terminal.

Method used

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  • Capacitance decompression AC-DC switch power source
  • Capacitance decompression AC-DC switch power source

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Embodiment Construction

[0008] Such as figure 1 As shown, this capacitive step-down AC-DC switching power supply includes a first rectifying diode D1, a second rectifying diode D2, a third rectifying diode D3, a fourth rectifying diode D4, a first voltage dividing capacitor C1, a second voltage dividing capacitor C2 , the third voltage dividing capacitor C3 , the fourth voltage dividing capacitor C4 , the first voltage regulating switch tube Q4 , the second voltage regulating switch tube Q3 , the output diode D9 , the output capacitor C5 , the inductor L1 and the controller 1 . The parameters of the first voltage dividing capacitor, the second voltage dividing capacitor, the third voltage dividing capacitor and the fourth voltage dividing capacitor are all the same, and the four voltage dividing capacitors are divided into two groups, the first voltage dividing capacitor and the second voltage dividing capacitor are one group, the third voltage dividing capacitor and the fourth voltage dividing capac...

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PUM

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Abstract

A capacitor step-down AC-DC switching power supply, comprising four rectifier diodes (D1, D2, D3, D4), a first voltage dividing capacitor (C1), a second voltage dividing capacitor (C2), a third voltage dividing capacitor ( C3), the fourth voltage dividing capacitor (C4), the controller (1), the first isolation diode (D6), the second isolation diode (D8), the first ground diode (D5), the second ground diode (D7), The first discharge switch tube (Q1) and the second discharge switch tube (Q2), the four voltage-dividing capacitors are divided into two groups, and each group of voltage-dividing capacitors is controlled by the controller when it enters the negative half cycle after being charged in the positive half cycle. The connection of the diode and the discharge switch tube is connected in parallel to discharge the load together, so that the electric energy on each voltage-dividing capacitor can be fully utilized, and the power supply can provide a large DC output current, and it also plays the role of online natural isolation.

Description

technical field [0001] The invention relates to a structure of a power supply for converting alternating current into direct current, and a capacitive step-down AC-DC switching power supply. Background technique [0002] In the step-down switching power supply, the inductance energy storage step-down is often used to transfer energy, and the step-down is determined by the turns ratio and pulse width of the switching transformer. Chinese patent 200620014628.8 introduces a resistor-capacitor step-down power supply circuit, which includes a half-wave rectifier circuit, a first energy storage capacitor, a second energy storage capacitor and a three-terminal device for controlling the charging circuit. Continue to supply power to the DC power supply for half a week, and can obtain twice the power supply capacity of the conventional resistor-capacitor step-down power supply. This kind of circuit is only suitable for half-wave rectification circuits, the waveform distortion of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/06H02M3/06H02M3/07
Inventor 葛铮
Owner ZHEJIANG YUANCHUANG ELECTRONICS TECH