The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Three-Phase Interleaved Isolated High Efficiency Boost Converter

인터리브 방식 삼상 절연형 고효율 부스트 컨버터

  • Published : 2009.12.05
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Abstract

In this paper, a new three-phase interleaved isolated high efficiency boost dc-dc converter with active clamp is proposed. The converter is capable of increased power transfer due to its three-phase power configuration, and it reduces the rms current per phase, thus reducing conduction losses. Further, interleaved operation of three-phase boost converter reduces overall ripple current, which is imposed into fuel cells and realizes smaller sized filter components, increasing effective operating frequency and leading to higher power density. Each output current of three-phase boost converter is combined by the three-phase transformer and flows in the continuous conduction mode by the proposed three-phase PWM strategy. An efficiency of above 96% is mainly achieved by reducing conduction losses and switching losses are reduced by the action of active clamp branches, as well. The proposed converter and three-phase PWM strategy are analyzed, simulated and implemented in hardware. Experimental results are obtained on a 500 W prototype unit, with all of the design verified and analyzed.

이 논문은 새로운 인터리브 방식 삼상 절연형 고효율 부스트 컨버터를 제안한다. 이 컨버터는 삼상 전력변환 방식을 채택하여 보다 큰 전력전송 능력을 갖으며 각 상의 rms 전류값이 작으므로 전도손실도 작다. 이에 더하여, 삼상 부스트 컨버터의 인터리브 동작으로 인하여 입력 전류 리플이 줄어들고, 실효 동작 주파수의 증가로 필터소자의 크기가 작아져서 높은 전력밀도를 갖는다. 부스트 컨버터 출력의 각 상 전류는 제안된 3 상 PWM 구동방식에 따라 전류 연속모드로 동작하여 3 상 변압기로 통합된다. 이 컨버터는 전도손실이 작아 96% 이상의 효율로 동작하며 능동클램프의 작용으로 스위칭 손실도 역시 작다. 제안된 컨버터와 PWM 구동방식을 분석 및 시뮬레이션 하고 하드웨어로 제작하였다. 제작된 시제품을 500 W 급으로 실험하여 모든 설계검증 및 해석을 실시하였다.

Keywords

References

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