The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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The realization of the Dimmable Magnetic Ballast for HID Lamps by the Life Time Extension Method of the Relays

릴레이 수명 연장 방법에 의한 HID램프용 디밍 자기식 안정기의 구현

  • 정광현 (강원대 공대 전기전자공학과) ;
  • 이현진 (강원대 공대 대표학과) ;
  • 박종연 (강원대 공대 전기전자공학과)
  • Published : 2009.03.01
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Abstract

The dimmable magnetic ballast which applies the variable inductor needs a switching process for the dimming process, and it consists of mechanical relays because of costs and reliabilities. However, it is hard to operate with correct timing in mechanical relay, so relays reduce their own life time in inductive applications. Moreover this creates a destructive problem at the switching process. The life time reduction of relays means the life time reduction of the ballast. Thus, in this paper, we described the problem at the witching process in the dimmable magnetic ballast with a variable inductor, which consists of relays and the soft AC switching method in order to solve the problems. As result, we achieved the improvement of the life time and reliability of the ballast.

Keywords

References

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