The Transactions of the Korean Institute of Electrical Engineers B (대한전기학회논문지:전기기기및에너지변환시스템부문B)
- Volume 48 Issue 6
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- Pages.342-348
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- 1999
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- 1229-2451(pISSN)
A Zero-Voltage and Zero-Current Switching Full Bridge DC-DC Converter for Arc Welding Machines
아크 용접에 적합한 영전압영전류 방식의 풀브릿지 컨버터
Abstract
A new welding machine which adopts zero voltage and zero current switching(ZVZCS) full bridge(FB) DC-DC converter is proposed. The proposed ZVZCS FB DC-DC converter uses auxiliary transformer to obtain ZCS for leading leg. It has capability of controlling load current even in short circuit condition and is suitable for arc welding machines. The power rating of the auxiliary transformer is about one 5th to one 10th of the main transformer. Experimental results for 10KW prototype are shown to verify the principle of operation.