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Three-phase isolation AC-DC converter

A converter, three-phase technology, applied in the direction of converting AC power input to DC power output, irreversible AC power input converting to DC power output, high-efficiency power electronic conversion, etc. The problems of huge size and large number of switch tubes are beneficial to circuit efficiency, large switching loss, and easy high frequency.

Active Publication Date: 2020-05-22
南昌杜迪电子技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this structure requires a large number of switching tubes, the design of the drive circuit is complicated, and the DC bus capacitor is bulky

Method used

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  • Three-phase isolation AC-DC converter
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  • Three-phase isolation AC-DC converter

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] As shown in Figure 1(a), a three-phase isolated AC-DC converter according to an embodiment of the present invention includes an A-phase input terminal, a B-phase input terminal, a C-phase input terminal, a three-phase full-bridge structure 100, and a resonant Network 200 and output rectification unit 300.

[0028] The primary side of the three-phase isolated AC-DC converter adopts a three-phase full-bridge structure, and each phase bridge arm adopts a pair of four-quadrant switches. The three-phase full-bridge structure 100 includes an A-phase upper bridge arm switch unit 101, a B-phase upper bridge arm switch unit 102, a C-phase upper bridge arm switch unit 103, an A-phase lower bridge arm switch unit 104, and a B-phase lower arm switch unit 102. The bridge arm switching tube unit 105 and the C-phase lower bridge arm switching tube uni...

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Abstract

The invention discloses a three-phase isolation AC-DC converter. The three-phase isolation AC-DC converter comprises a primary side, a secondary side and a resonant network, upper and lower bridge arms of each phase of a primary side adopt a group of common-source anti-series switching tubes with the same structure, a resonance network adopts an LLC series resonance structure, and a secondary siderectification side adopts a rectification circuit. The power device of the primary side circuit of the topology can realize zero-voltage soft switching (ZVS) and can realize a power factor correctiontechnology (PFC) function at the same time. According to the converter, the power factor correction technology and the resonance soft switching technology are combined, so that the input current of the converter changes well along with the input voltage, and the PFC function is realized; the converter realizes stable direct-current voltage output by controlling output voltage; and meanwhile, theconverter is provided with a high-frequency transformer, so that an electrical isolation function can be realized.

Description

technical field [0001] The invention belongs to the field of power electronics, in particular to an AC-DC converter. Background technique [0002] With the deepening of the global energy crisis and the enhancement of environmental protection awareness in various countries, electric vehicles have been more and more widely used, and electric vehicles in my country have also ushered in explosive growth. scale. As an indispensable energy supply device, the charging system is the key infrastructure for the promotion and application of electric vehicles. But unfortunately, although the number of charging piles continues to double, there are still problems of large size and low efficiency. Therefore, it is of great social and economic significance to study charging systems with high power density and high efficiency. [0003] According to whether the converter contains an isolation transformer, the topology of the charging system can be divided into isolation type and non-isolati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/217H02M7/06H02M7/219H02M1/42
CPCH02M1/4233H02M7/06H02M7/217H02M7/219H02M1/0058Y02B70/10
Inventor 刘斌李伦全江良星周涛
Owner 南昌杜迪电子技术有限公司
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