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Single-stage alternating current/direct current converter

A DC converter, single-stage technology, applied in the direction of converting AC power input to DC power output, high-efficiency power electronic conversion, output power conversion device, etc., can solve the problems of increasing line conversion loss and reducing power conversion efficiency

Inactive Publication Date: 2011-05-18
FSP POWERLAND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will additionally increase the conversion loss of the line and reduce the power conversion efficiency

Method used

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  • Single-stage alternating current/direct current converter
  • Single-stage alternating current/direct current converter

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Embodiment Construction

[0010] Such as figure 1 As shown, the single-stage AC / DC converter of the present invention includes a power frequency freewheeling circuit 1, an isolated transmission circuit 2, a high frequency chopper modulation circuit 3, a power frequency and high frequency AC rectifier circuit 4 and a filter circuit 5, wherein the isolation The input terminal of the transmission circuit 2 is connected to the output terminal of the external power frequency power supply, the current modulation terminal of the isolated transmission circuit 2 is connected to the input terminal of the high frequency chopper modulation circuit 3, and the output terminal of the isolated transmission circuit 2 is connected to the power frequency and high frequency AC rectification The input end of the circuit 4, the output end of the high frequency chopper modulation circuit 3 are connected in series with the power frequency freewheeling circuit 1 and then connected with the input end of the external power freque...

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Abstract

The invention discloses a single-stage alternating current / direct current converter, which comprises a power frequency crowbar circuit, an isolated transmission circuit, a high frequency chopped modulation circuit, a power frequency and high frequency alternating current rectification circuit and a filter circuit, wherein the input end of the isolated transmission circuit is connected with the output end of an external power frequency power supply; a current modulation end of the isolated transmission circuit is connected with the input end of the high frequency chopped modulation circuit; the output end of the isolated transmission circuit is connected with the input end of the power frequency and high frequency alternating current rectification circuit; the output end of the high frequency chopped modulation circuit is connected in series with the power frequency crowbar circuit and then is connected with the input end of the external power frequency power supply; and the output endof the high frequency alternating current rectification circuit is connected in series with the filter circuit and then is connected with a load. The single-stage alternating current / direct current converter simplifies the rectification link so as to achieve higher conversion efficiency.

Description

technical field [0001] The invention relates to a single-stage AC / DC converter and belongs to the technical field of AC / DC power isolation transmission. Background technique [0002] When we review the power conversion architecture of AC / DC power supplies, we will find that there are repeated power conversion links in the entire power flow process. Whether in a single-stage PFC AC / DC converter or a two-stage conversion (PFC+DC / DC) AC / DC, the front end always needs a power frequency AC / DC rectification link. But on the secondary side of the transformer, a high-frequency DC / AC rectification link is always needed to convert the high-frequency electric energy generated and transmitted by the primary side inverter into DC. Therefore, there are two rectification actions during the entire power transmission process. This will additionally increase the conversion loss of the line and reduce the power conversion efficiency. Contents of the invention [0003] The purpose of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/155
CPCH02M1/4258H02M1/425Y02B70/126Y02B70/10
Inventor 徐明孙巨禄孙超
Owner FSP POWERLAND TECH