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A hybrid bridge arm single-phase three-level power factor correction circuit

A power factor correction, three-level technology, used in high-efficiency power electronic conversion, output power conversion devices, conversion of AC power input to DC power output, etc., can solve the problem of large filter volume, low switching frequency, and reduced efficiency problems, to achieve the effect of small inductance and capacitance, small voltage stress, and high power level

Active Publication Date: 2022-05-20
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low switching frequency of two-level, it is usually necessary to use large inductance and large capacitance, which makes the overall size of the filter larger and the efficiency lower.

Method used

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  • A hybrid bridge arm single-phase three-level power factor correction circuit
  • A hybrid bridge arm single-phase three-level power factor correction circuit
  • A hybrid bridge arm single-phase three-level power factor correction circuit

Examples

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Embodiment Construction

[0045] Such as figure 1As shown, a hybrid bridge arm single-phase three-level power factor correction circuit, the left side includes a pseudo-totem pole structure, a DC bus capacitor and a clamping branch. Diode D 1 、D 2 , switch tube S 1 , S 2 and inductance L 1 , L 2 Form a pseudo-totem pole structure; the right side is the switch tube S 3 , S 4 The clamping branch consisting of, and the series capacitor C 1 、C 2 Composed of DC bus structure. Diode D 3 、D 4 、D 5 、D 6 The composed diode bridge arm and the pseudo-totem pole bridge arm form a hybrid bridge arm.

[0046] The rectifier circuit includes a switch tube S 1 ~S 4 , Diode D 1 ~D 6 , AC power u g , inductance L 1 , L 2 , capacitance C 1 、C 2 ;

[0047] The diode D on the left side of the power factor correction circuit 1 , switch tube S 1 , inductance L 1 with diode D 2 , switch tube S 2 , inductance L 2 Two pseudo-totem pole bridge arms are respectively formed; the right side is the switc...

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Abstract

A hybrid bridge arm single-phase three-level power factor correction circuit, AC power u g one side with a shunt inductor L 1 , L 2 connected, the inductance L 1 Switch tube S 1 drain and D 1 The anode is connected to form the intersection point a; the inductance L 2 with diode D 2 Cathode and S 2 source, forming intersection point b; AC source u g The other side with diode D 5 Anode and D 6 The cathodes are connected to form the intersection N; the diode D 1 Cathode, D 3 Cathode, switch tube S 2 drain and capacitance C 1 Anode connected to point p; diode D 2 Anode, D 4 Anode, switch tube S 1 source and capacitor C 2 The negative pole is connected to point m; the switch tube S 3 source, S 4 Drain and Split Capacitor C 1 Negative pole, C 2 The positive pole is connected to point n. The power factor correction circuit of the present invention has a three-level structure, and has the advantages of high efficiency, high reliability, lower harmonics and voltage stress, smaller alternating current harmonics, and the like.

Description

technical field [0001] The invention relates to the field of power conversion, in particular to a hybrid bridge arm single-phase three-level power factor correction circuit. Background technique [0002] Compared with the traditional two-level circuit, the output inductance and capacitance of the multi-level circuit are smaller, and the overall design of the filter can tend to be small and modular, which is convenient for installation and application. In addition, the smaller the size of the inductor, the fewer turns it has, the smaller the active power loss on the inductor, and the higher the efficiency. However, due to the low switching frequency of the two-level circuit, it is usually necessary to use large inductance and large capacitance, which makes the overall size of the filter larger and the efficiency lower. The purpose of converter research is to improve the configuration of power circuits for higher efficiency, reliability, lower harmonics and voltage stress. C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42H02M7/217H02M7/797
CPCH02M1/4225H02M1/4233H02M7/217H02M7/797Y02B70/10
Inventor 马辉敬成徐甜川刘昊邦
Owner CHINA THREE GORGES UNIV
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