Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Loss analysis for the novel half bridge inverter with load free-wheeling mode

부하 환류모드를 제공하는 새로운 반 브리지 인버터의 손실해석

  • Yeon, Jae-Eul (Dept. of Mechatronics Engineering Hanyang Univ.) ;
  • Cho, Kyu-Min (Dept. of Information and Communication Engineering Yuhan College) ;
  • Kim, Hee-Jun (School of Electrical Engineering & Computer Science Hanyang Univ.)
  • 연재을 (한양대학교 메카트로닉스 공학과) ;
  • 조규민 (유한대학 정보통신과) ;
  • 김희준 (한양대학교 전자 컴퓨터 공학부)
  • Published : 2003.10.30
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Abstract

The resonant inverter is widely used for induction heating, electronic ballast and supersonic motor driving circuit. In the meantime, control techniques of PWM, PFM etc.. are mainly applied to control the output power of the resonant inverter. But, in the case of using the half bridge resonant inverter, it is difficult to control the output power by PWM, because its main circuit does not provide the load free-wheeling mode. Therefore, PAM or PFM was usually applied to control output power of half bridge resonant inverter. However, PAM needs a variable DC voltage source, which makes the system structure more complex. On the other hand, in case of PFM, efficiency is declined by operation with poor power factor. This paper Proposed the novel half bridge resonant inverter which can provide the load free-wheeling mode. Also its analysis results for PWM operation with unity fundamental power factor are Presented and compared with other resonant inverters using PWM and PFM.

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