Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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The Development of Electric Ballast for a Instant Start/Restart of Metalhalide Lamp

메탈핼라이드램프용 순시점등/재점등 전자식안정기 개발

  • 김수경 (서울산업대학교 전기공학과) ;
  • 장우진 (서울산업대학교 전기공학과)
  • Published : 2004.09.01
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Abstract

The most shortcoming of metalhalide lamps is what the instant restarting cannot be realized when the arc tube is in the hot condition. The discharge starting voltage of arc tube in the hot condition is much higher than in the cold condition. Therefore it takes about five minutes to restart the metalhalide lamps, that is to say, it is possible to start when the pressure and the temperature are decreased. But, if the lamp is restarted in the hot condition, we must supply the high voltage pulse with 20[kV] at the both electrode of lamp. The proposed electronic ballast is consist of a electromagnetic interference(EMI) filter, a power factor correction(PFC) circuit, a flyback converter, a half-bridge inverter, and a high voltage igniter circuit. By this composition we can start/restart the lamp with the voltage 20[kV], even if the lamp is in the hot condition.

메탈핼라이드 램프의 가장 큰 단점중 하나는 아크튜브가 뜨거운 상태에서는 순시 재점등이 불가능하다는 것이다. 메탈핼라이드 램프의 점등중 고온의 아크튜브는 초기 램프가 차가운 상태에서의 방전 전압보다 재점등 방전전압이 높아 재점등 시키는데 압력과 온도가 감소되어지는 약5분정도의 시간이 소요 된다. 만약 램프가 뜨거운 상태에서 재점등시키려면 램프전극 양단에 약20[kV] 이상의 높은 전압펄스를 공급해야한다. 따라서 이러한 목적의 전자식 안정기는 EMII필터, PFC회로, 플라이백 컨버터, 하프브리지 인버터, 고전압 이그나이터 회로로 구성되는데 이것은 순시점등은 물론 램프가 뜨거운 상태에서도 20[kV]의 전압으로 램프를 점등/재점등 할 수 있다.

Keywords

References

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