A Primary-Side-Assisted Zero-Voltage and Zero-Current Switching Full Bridge DC-DC Converter with Transformer Isolation for Arc Welding

아크 용접에 적합하며 1차 측 보조회로를 사용하는 영전압-영전류 직류-직류 컨버터

  • 전성집 (부경대 전자컴퓨터정보통신공학부) ;
  • 조규형 (한국과학기술원 정보전자공학부)
  • Published : 2000.10.01

Abstract

A new primary-side-assisted zero-voltage and zero-current switching full bridge DC-DC converter with transformer isolation is proposed. The auxiliary circuit adopted to assist ZCS for the leading leg is composed of only one small transformer and two diodes. It has a simple and robust structure, and load current control capability even in short circuit conditions. Possibility of magnetic saturation due to asymmetricity of circuits or transient phenomena is greatly reduced, which is a very attractive feature in DC/DC converters with transformer isolation. The power rating of the auxiliary transformer is about 10% of that of the main transformer. Operation of a 12.5KW prototype designed for welding application was verified by experiments.

Keywords

References

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