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Three-phase single-stage full-bridge power factor corrector for primary sideband auxiliary link of transformer

A power factor correction and transformer technology, applied in the direction of output power conversion device, high-efficiency power electronic conversion, electrical components, etc., to achieve the effect of power factor correction and voltage suppression

Inactive Publication Date: 2016-03-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the defect that the existing three-phase unipolar PFC circuit cannot take into account the above two technical problems well, and provides a three-phase single-stage full-bridge power factor corrector for the primary sideband auxiliary link of the transformer

Method used

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  • Three-phase single-stage full-bridge power factor corrector for primary sideband auxiliary link of transformer
  • Three-phase single-stage full-bridge power factor corrector for primary sideband auxiliary link of transformer
  • Three-phase single-stage full-bridge power factor corrector for primary sideband auxiliary link of transformer

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specific Embodiment approach 1

[0030] Specific implementation mode one: the following combination Figure 1 to Figure 13 Describe this embodiment, the three-phase single-stage full-bridge power factor corrector of transformer primary sideband auxiliary link described in this embodiment, it comprises three-phase input rectification circuit 1, phase-shifting bridge 3, transformer T, output rectification circuit 4, Capacitance C 5 and resistance R;

[0031] The positive output terminal of the three-phase input rectifier circuit 1 is connected with the positive input terminal of the phase-shifting bridge 3; the negative output terminal of the three-phase input rectifier circuit 1 is connected with the negative input terminal of the phase-shifting bridge 3;

[0032] The AC output end of the phase-shifting bridge 3 is connected to both ends of the primary winding of the transformer T, and the two ends of the secondary winding of the transformer T are connected to the input end of the output rectification circuit...

specific Embodiment approach 2

[0061] Specific Embodiment 2: This embodiment further describes Embodiment 1. The three-phase AC input terminal of the three-phase input rectifier circuit 1 passes through the boost inductor L a , L b and L c Access to three-phase AC voltage u a , u b and u c ; Boost inductor L a , L b and L c The inductance values ​​are equal.

[0062] The three-phase input rectification circuit 1 is composed of six diodes to form a three-phase full-bridge rectification circuit.

specific Embodiment approach 3

[0063] Specific implementation mode three: This implementation mode further explains the first implementation mode, and each boost inductor is connected in series with a pre-charging current-limiting resistor R i , each precharge current limiting resistor R i A switch K is connected in parallel at both ends.

[0064] R i is the capacitance C C1 and capacitance C C2 The precharge current limiting resistor.

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Abstract

The invention discloses a three-phase single-stage full-bridge power factor corrector of a transformer primary sideband auxiliary link and belongs to the field of power electronics. The shortcoming that an existing three-phase single-stage PFC circuit cannot well integrate the two sides is overcome. The three-phase single-stage full-bridge power factor corrector comprises a three-phase input rectifying circuit, a phase shifting bridge, a transformer T, an output rectifying circuit, a capacitor C5, a resistor R and a passive auxiliary link. The passive auxiliary link is placed between the three-phase input rectifying circuit and the phase shifting bridge. The passive auxiliary link comprises a diode DL1, a diode DL2, a diode DC, a diode Df, a capacitor CC1, a capacitor CC2 and a transformer Tf. The transformer Tf is provided with primary side windings L1 and L2 which are wound in parallel and an auxiliary winding Lf. The primary side windings L1 and L2 and the auxiliary winding Lf are wound on a magnetic core.

Description

technical field [0001] The invention relates to a three-phase single-stage full-bridge power factor corrector for a primary sideband auxiliary link of a transformer, 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 the harmonics to the power grid has attracted more and more attention. Power factor correction (powerfactorcorrection, PFC) technology is an effective method to suppress harmonic currents and improve the power factor of the grid side of electrical equipment, and is a research hotspot in the field of power electronics. According to different circuit structures, PFC technology is divided into two-stage type and single-stage type: two-stage PFC is composed of PFC circuit and DC / DC (direct current / direct current) converter, and has the advantages of good PFC effect and output characteristics. Howe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42H02M1/32H02M1/36
CPCY02B70/10
Inventor 孟涛贲洪奇王雪松
Owner HARBIN INST OF TECH