Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference (한국조명전기설비학회:학술대회논문집)
- 2000.11a
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- Pages.111-115
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- 2000
Implementation of an Electronic Ballast for Metal Halide Discharge 400W lamp
400W 메탈 핼라이드 램프의 전자식 안정기 구현
Abstract
In this paper, a prototype electronic ballast for 400W MH lamps is designed and implemented. To remove the phenomenon of acoustic resonance in the lamp being operated at high frequency, a spread spectrum method is employed on the ballast. Half-bridge resonant inverter, voltage-controlled-oscillator and PFC are used and the current of lamp is controlled with taking into account the voltage of lamp. The ballast is built with analog OP-amps and MOSFETs. The experimental results show the good performance as PF 0.93, ATHD 0.14, Ballast loss 22W at output 400W.
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