Single-phase power factor correction circuit based on three-transistor five-level topology

A single-phase power and correction circuit technology, which is applied in high-efficiency power electronic conversion, output power conversion device, AC power input conversion to DC power output, etc., can solve problems such as large number of tubes, complicated control, and insufficient number of levels , achieve simple topology, reduce failure loss, and simple structure

Active Publication Date: 2021-06-04
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing three-level topology has insufficient levels; the existing five-level topology has a large number of tubes and complex control.

Method used

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  • Single-phase power factor correction circuit based on three-transistor five-level topology
  • Single-phase power factor correction circuit based on three-transistor five-level topology
  • Single-phase power factor correction circuit based on three-transistor five-level topology

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Embodiment Construction

[0042] Such as figure 1 As shown, the single-phase power factor correction circuit based on three-tube five-level topology, including inductor L, switch tube Q 1 , Q 2 , Q 3 , Diode D 1 ~D 11 , capacitance C 1 , capacitance C 2 ;

[0043] The AC side of the AC power supply is connected to the diode D 1 anode, diode D 2 a cathode connected to the nodes forming terminal b;

[0044] The other side of the AC power supply AC is connected to one end of the inductor L, and the other end of the inductor L is connected to the diode D 3 anode, diode D 4 Cathode; the other end of the inductor L and the diode D 3 、D 4 The connected nodes of constitute the endpoint a;

[0045] Switch tube Q 2 The drains are connected to the diode D 3 cathode, diode D 9 Cathode, switching tube Q 1 source;

[0046] Switch tube Q 2 The source is connected to the diode D respectively 4 anode, diode D 10Anode, switching tube Q 3 Drain;

[0047] Diode D 7 Cathode connection capacitance C ...

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Abstract

Single-phase power factor correction circuit based on three-tube five-level topology, involving the field of power factor correction circuits, including switching tube Q 1 , Q 2 , Q 3 , the AC side of the AC power supply is connected to the diode D 1 anode, diode D 2 Cathode, its connection node constitutes terminal b; the other side of the AC power supply AC is connected to one end of the inductor L, and the other end of the inductor L is respectively connected to the diode D 3 anode, diode D 4 Cathode, connected to node to form terminal a; diode D 7 Cathode connection capacitance C 1 One end, the connecting node constitutes the terminal p; the capacitance C 1 The other end is connected to the capacitor C 2 One end, the connecting node constitutes the terminal n; the capacitor C 2 The other end is connected to the diode D 8 The anode, its connection node constitutes the terminal m; the switch tube Q 1 The drains are connected to the diode D 1 cathode, diode D 7 Anode, its connection node constitutes terminal c; switching tube Q 3 The source is connected to the diode D respectively 2 anode, diode D 8 Cathode, whose connection nodes form terminal d. The endpoints a, c, d, n form a symmetrical four-port. The correction circuit of the present invention adopts multi-level, and has the advantage of small voltage stress of the switch tube.

Description

technical field [0001] The invention relates to a topology of a single-phase power factor correction circuit, in particular to a single-phase power factor correction circuit based on a three-tube five-level topology. Background technique [0002] Single-phase high power factor or power factor corrected (PFC) boost converters are one of the most popular areas of research today. The main focus of this kind of converter is unity power factor and low total harmonics. Usually, power factor correction is achieved by applying a boost circuit after rectification. The existing three-level topology has insufficient levels; the existing five-level topology has a large number of tubes and complex control. Contents of the invention [0003] The invention provides a single-phase power factor correction circuit based on a three-tube five-level topology, which is suitable for small and medium power applications. The circuit structure of the present invention has the characteristics of s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42H02M7/217H02M7/155
CPCH02M1/4225H02M7/155H02M7/217Y02B70/10
Inventor 马辉鲁海鹏郑凯通
Owner CHINA THREE GORGES UNIV
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