Design of Electronic Ballast Reducing Acoustic Resonances Phenomina in Metal Halide Discharge Tube

메탈 할라이드 방전관 내의 음향 공명을 감소시킨 전자식 안정기 설계

  • Published : 1999.10.01

Abstract

Meta! Halide Discharge(]\1HD) Iamps have good color rendition, long life and good focusing capability but h have flickers bv acoustic resonances. We have designed the electronic ballast for reducing acoustic resonances in high pressure discharge tube. The ballast consists of main two parts, the first part is a half-bridge inverter to make a square wave form a and the st'Cond part is a flyback converter to combine the low frequency and high frequency component. As a r result of this study, we conclude that MHD lamps of 70 watt 따c very well light(D without acoustic resonance p phenomena by the elestronic ballast.

메탈 할라이드 방전 램프는 연색성이 좋고 수명이 길며, 점광원이기 때문에 조명제어가 용이한 장점이 있으나, 고압 방전 할 때 방전관애의 음향 공명 현상을 감소하기 위하여 MHD 램프용 전자식 안정기의 주요부를 첫째, 구형파를 얻기 위한 타려식 하프브리지 인버터와 둘째, 저주파인 구형파에 고주파를 첨가하기 위한 플라이백 컨버터로 실현하였다. 이와 같이 설계 제작된 전자식 안정기로 70W의 MHD 램프를 점등한 결과 음향 공명 현상인 광속의 흔들림이 없는 매우 양호한 조명이 되었다.

Keywords

References

  1. Ibid Arc Instability in Mercury and Metal Halide Arc Lamp R.J.Zollweg
  2. Ibid Convention i Vertical Mercury and Metal Halide Arc Lamps R.J.Zollweg
  3. Industrial Lighting Systems J.P.Frier;M.E.Gazley Frier
  4. Philips Journal of Research v.38 no.4;5 Acoustic Resonances in High Frequency Operated Low Wattage Metal Halide Lamps J.WDenneman
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