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A Boost Power Factor Correction Converter

A technology of power factor correction and converter, which is applied in the direction of output power conversion device, high-efficiency power electronic conversion, climate sustainability, etc., can solve the problems of input current distortion and input power factor reduction, and achieve the reduction of total harmonic distortion , reduce the output voltage ripple and improve efficiency

Active Publication Date: 2021-10-19
XIHUA UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the COT control or PCM control CRM Boost PFC converter, the constant duty cycle control DCM Boost PFC converter has a fixed switching frequency, but there is input current distortion, and with the increase of the input voltage, the input current distortion is more serious, resulting in Input Power Factor Reduction

Method used

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  • A Boost Power Factor Correction Converter
  • A Boost Power Factor Correction Converter
  • A Boost Power Factor Correction Converter

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] The embodiment of the present invention discloses a Boost power factor correction converter, see figure 1 As shown, the Boost converter includes a Boost converter 1 and a control circuit 2 connected to each other;

[0033] Boost power factor correction converter, including interconnected Boost converter 1 and control circuit 2;

[0034] The control circuit 2 includes a voltage sampling circuit 21, an error amplifier circuit 22 and a mixed mode drive ci...

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Abstract

The present application discloses a Boost power factor correction converter, including a Boost converter and a control circuit connected to each other; the control circuit includes a voltage sampling circuit, an error amplifier circuit and a mixed-mode drive circuit; the mixed-mode drive circuit includes a first comparator , a first RS flip-flop, a second RS flip-flop, a third RS flip-flop, an AND gate circuit, a zero-crossing detection circuit, a variable slope sawtooth wave generation circuit, a corner frequency signal generation circuit and a main switch for driving a Boost converter drive circuit; the mixed-mode drive circuit constructed in this application can control the main switch to make the Boost converter work in two modes: discontinuous conduction mode and critical conduction mode, control the maximum frequency of the main switch in the Boost converter, and improve the power factor , improve efficiency, reduce the total harmonic distortion of its input current, reduce the switching frequency range, reduce the peak value of the input current, and reduce the output voltage ripple.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a Boost power factor correction converter. Background technique [0002] In recent years, power electronics technology has developed rapidly, and power supply technology, which is an important part of the power electronics field, has gradually become a hot spot in application and research. Switching power supply has established its mainstream position in the field of power supply because of its high efficiency and high power density, but there is a fatal weakness when it is connected to the power grid through a rectifier: the power factor is low (generally only 0.45 to 0.75), Moreover, a large number of current harmonics and reactive power will be generated in the grid to pollute the grid. There are two main methods of suppressing harmonics generated by switching power supplies: one is the passive method, that is, using passive filtering or active filtering circuits to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42H02M1/12H02M1/14
CPCH02M1/12H02M1/14H02M1/4225Y02B70/10
Inventor 阎铁生沈伟沈霞赵梓淮王军曹太强宋潇潇孙章
Owner XIHUA UNIV
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