Implementation of Three-Phase Fed DC Power Supply System with High Power Factor
碩士 === 中原大學 === 電機工程研究所 === 93 === In this thesis, a high efficiency power supply system with high power factor is proposed for high power applications. The studied power supply system consists with a three-phase three-switch power factor corrector (PFC) and a phase-shifted zero-voltage-transition f...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2005
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| Online Access: | http://ndltd.ncl.edu.tw/handle/x27zfm |
| Summary: | 碩士 === 中原大學 === 電機工程研究所 === 93 === In this thesis, a high efficiency power supply system with high power factor is proposed for high power applications. The studied power supply system consists with a three-phase three-switch power factor corrector (PFC) and a phase-shifted zero-voltage-transition full-bridge DC/DC converter with current doubler rectification. High power factor input can be achieved by the adopted PFC circuit with a simple configuration. The phase-shifted operation of the full-bridge DC/DC converter provides the zero-voltage-switching (ZVS) features for the bridge switches to reduce the switching losses effectively. The current doubler rectification reduces significantly the secondary rectification losses. Therefore, high efficiency can be also accomplished. The detailed operating principle and design consideration of this power supply system are analyzed and described. A 1.1kW 55V/20A laboratory prototype was implemented and tested. The experimental waveforms verify the feasibility of the proposed design. The implemented power supply system exhibits optimum performances such as high power factor, high efficiency, simple configuration and high reliability.
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