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Method for startup and magnetic reset of three-phase single-stage power factor correction circuit and realization circuit

A power factor correction and magnetic reset technology, which is applied in high-efficiency power electronic conversion, output power conversion devices, electrical components, etc., can solve the problems of three-phase single-stage power factor correction circuits that cannot be used in practical circuits for industrial applications, etc. To achieve the effect of magnetic reset, safe and normal starting

Inactive Publication Date: 2012-01-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to solve the problem that the existing three-phase single-stage power factor correction circuit cannot be used in the actual circuit of industrial application, and provides a three-phase single-stage power factor correction circuit starting and magnetic reset method and a realization circuit

Method used

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  • Method for startup and magnetic reset of three-phase single-stage power factor correction circuit and realization circuit
  • Method for startup and magnetic reset of three-phase single-stage power factor correction circuit and realization circuit
  • Method for startup and magnetic reset of three-phase single-stage power factor correction circuit and realization circuit

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specific Embodiment approach 1

[0042] Specific implementation mode one: the following combination Figure 5 to Figure 15 To illustrate this embodiment, the three-phase single-stage power factor correction circuit used in this embodiment includes a three-phase input rectifier circuit 1, a phase-shifting bridge 2, a high-frequency transformer T, an output rectifier circuit 3, and an output filter capacitor C,

[0043] Three-phase input rectifier circuit 1 consists of D 1 to D 6 Six diodes form a three-phase full-bridge rectifier circuit,

[0044] phase shift bridge 2 by S 1 to S 4 Four switching tubes form a full bridge switching circuit,

[0045] The output end of the three-phase input rectifier circuit 1 is connected to the input end of the phase-shifting bridge 2, the output end of the phase-shifting bridge 2 is connected to the two ends of the primary winding of the high-frequency transformer T, and the two ends of the secondary winding of the high-frequency transformer T are connected to the The inp...

specific Embodiment approach 2

[0072] Specific implementation mode two, the following combination Figure 5 Describe this embodiment. This embodiment implements the realization circuit of the start-up and shutdown magnetic reset method of the three-phase single-stage power factor correction circuit described in Embodiment 1, including a three-phase input rectifier circuit 1, a phase-shifting bridge 2, and a high-frequency transformer. T, output rectification circuit 3 and output filter capacitor C,

[0073] The three-phase single-stage power factor correction circuit involved in the method of this embodiment is a three-phase single-stage active power factor correction circuit based on a current source type with transformer isolation full-bridge boost topology.

[0074] The three-phase single-stage power factor correction circuit includes a three-phase input rectification circuit 1, a phase-shifting bridge 2, a high-frequency transformer T, an output rectification circuit 3 and an output filter capacitor C, ...

specific Embodiment approach 3

[0103] Specific implementation mode three, the following combination Image 6 This embodiment is described. The difference between this embodiment and the second embodiment is that it also includes an auxiliary winding L of the A-phase lower bridge arm fa2 , Phase A lower arm diode D a2 ; Phase B lower bridge arm auxiliary winding L fb2 , B-phase lower arm diode D b2 ; Phase C lower bridge arm auxiliary winding L fc2 , Phase C lower arm diode D c2 ,

[0104] Phase A upper bridge arm auxiliary winding L fa1 Coupling phase A upper bridge arm boost inductor L a1 energy of,

[0105] Phase A lower bridge arm auxiliary winding L fa2 Coupling phase A lower bridge arm boost inductor L a2 energy, A-phase lower bridge arm auxiliary winding L fa2 The terminal with the same name is grounded, and the auxiliary winding L of the lower bridge arm of phase A fa2 The opposite end of the phase A is connected to the lower arm diode D a2 The anode of A phase lower arm diode D a2 The c...

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Abstract

The invention discloses a method for startup and magnetic reset of a three-phase single-stage power factor correction circuit and a realization circuit, belongs to the field of power electronics, and solves the problem that the conventional three-phase single-stage power factor correction circuits cannot be applied to an actual circuit for industrial application. The three-phase single-stage power factor correction circuit is based on current source transformer isolated full-bridge boost topology. Two same boost inductors are serially connected to each bridge arm of a three-phase input rectifier circuit, and the connecting point of the two boost inductors is connected with an AC signal. An auxiliary winding is coupled with the two boost inductors and is connected in parallel with the whole circuit output end. The startup method for the three-phase single-stage power factor correction circuit is that: opposite arms or straight arms of switching tubes are conducted, the boost inductor through which the current passes stores the energy; and when the switching tubes are all closed, the auxiliary winding transfers all energy of the boost inductors to a circuit output side for realizingthe startup; in a similar way, when the switching tubes are all closed, the stored energy of the boost inductors is released and the power-off magnetic reset is realized according to the method.

Description

technical field [0001] The invention relates to a three-phase single-stage power factor correction circuit starting and magnetic reset method and a realization circuit, belonging to the field of power electronics. Background technique [0002] The wide application of nonlinear loads such as power electronics has brought a large number of harmonics to the power grid, and the "pollution" of harmonics to the power grid has attracted more and more attention. In order to effectively suppress harmonics, people have proposed Active Power Factor Correction (APFC) technology. At present, APFC technology is the most direct method to suppress harmonic currents and improve the power factor of the grid side of electrical equipment. APFC technology can be divided into two-stage type and single-stage type according to the circuit structure. Single-stage APFC integrates the PFC link and the DC / DC conversion link, and shares a controller. It has the advantages of simple structure, low cost, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42
CPCY02B70/126Y02B70/10
Inventor 孟涛贲洪奇孙绍华李春鹏
Owner HARBIN INST OF TECH
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