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Novel AC-DC rectifier circuit

A rectifier circuit and a new technology, applied in the field of rectifiers, can solve the problems of low efficiency and high production cost, and achieve the effects of high efficiency, low cost and simple circuit

Pending Publication Date: 2022-05-31
四川水利职业技术学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] like figure 1 As shown, the current popular AC-DC rectifier circuits generally adopt two-stage conversion, the first stage realizes PFC correction, and the second stage realizes DC / DC isolation and regulation of voltage and current regulation, such as figure 1 As shown, its main defects are high production cost and low efficiency

Method used

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  • Novel AC-DC rectifier circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The working principle is as follows: if figure 2 As shown, the circuit is composed of diodes D1~D4 to form a primary side bridge rectifier unit, the output end of the primary side bridge rectifier unit is electrically connected to capacitor C1, and capacitor C1 is a high frequency capacitor, which mainly provides a high frequency circuit for the circuit; the primary side bridge The output terminal of the bridge type rectifier unit is connected to the air-gapped transformer T1 through the switch tube Q1 with an anti-parallel diode. The negative pole of T1 is connected to the negative pole of the output terminal of the primary bridge rectifier unit through the switch tube Q1, the input terminal of the transformer T1 is electrically connected to the resonant capacitor C2, and the output terminal of the transformer T1 is connected to the secondary bridge rectifier unit, wherein the secondary bridge rectifier unit Composed of diodes Ds1-Ds4, a DC filter capacitor DC1 is ele...

Embodiment 2

[0045] Replace the switching tube Q1 in Embodiment 1 with a MOS tube, so that its own body diode can be used to form a loop. Specific as image 3 shown.

Embodiment 3

[0047] In the case that the primary and secondary sides do not need to be isolated, the inductor L11 can be used to replace the transformer to form a typical boost circuit. In particular, the tap of the inductor is used to form a boost ratio, and a MOS tube with a relatively low withstand voltage can be selected. The Rdson is smaller, the conduction loss is lower, and the cost of the low-voltage MOS tube is also lower. The discharge principle of the battery is as follows: when the MOS transistor Q11 is turned on, the resonant circuit of the inductor L11 and C11 stores energy. When the MOS transistor Q11 is turned off, the inductor L11 generates a left-negative and right-positive voltage, which is a resonant voltage waveform. Reverse charging, when the voltage exceeds the output voltage V DC1When the diode D11 conducts to supplement energy to DC1, when the voltage on C11 is resonated back to the clamping voltage nV battery When (n is the transformation ratio of the inductance ...

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Abstract

The invention relates to the field of rectifiers, and provides a novel AC-DC rectifier circuit. In order to reduce the cost and improve the efficiency, an original two-stage circuit is changed into a single-stage circuit, and PFC correction and isolation adjustment are both realized by the single-stage circuit. The main scheme comprises a high-frequency loop unit connected with the output end of a primary bridge rectifier unit; positive and negative electrodes of the input end of the transformer T1 are connected with positive and negative electrodes of the resonance unit respectively; the negative electrode input end of the transformer T1 is connected with the negative electrode of the output end of the primary side bridge type rectifying unit through a switching tube Q1 with an anti-parallel diode. The controller is electrically connected with the positive electrode of the primary side bridge type rectification unit to obtain an input voltage V1, and is connected with the negative electrode of the primary side bridge type rectification unit to obtain an input current I1; the controller is electrically connected with the positive electrode of the secondary bridge type rectification unit to obtain an input voltage V3, and is connected with the negative electrode of the secondary bridge type rectification unit to obtain an input current I2; a control end Driver signal end of the controller outputs a PWM signal to a grid electrode of a switch tube Q1 with an anti-parallel diode.

Description

technical field [0001] The invention relates to the field of rectifiers and provides a novel AC-DC rectifier circuit. Background technique [0002] Such as figure 1 As shown, the current popular AC-DC rectifier circuits generally adopt two-stage conversion, the first stage realizes PFC correction, and the second stage realizes DC / DC isolation and regulation of voltage and current regulation, such as figure 1 As shown, its main defects are high production cost and low efficiency. Contents of the invention [0003] The purpose of the present invention is to change the original two-stage circuit into a single-stage circuit in order to reduce cost and improve efficiency, and both PFC correction and isolation adjustment are realized by the single-stage circuit. [0004] In order to realize above-mentioned technical scheme, the present invention adopts following technical means: [0005] A new type of AC-DC rectifier circuit, including primary bridge rectifier unit, high freq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/08H02M1/32H02M1/42H02M7/06
CPCH02M3/33515H02M3/33523H02M1/083H02M1/32H02M1/4208H02M7/068Y02B70/10
Inventor 杨鸽郑嘉龙刘一均王莹卓玉洁谭兴杰
Owner 四川水利职业技术学院
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