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Dimming Control System for Multi-Fluorescent Lamp Using AC Chopper Technique  

정동열 (강원대 공대 전기공학과)
박종연 (강원대 공대 전기공학과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers B / v.52, no.4, 2003 , pp. 177-182 More about this Journal
Abstract
We have proposed the dimming controller using the AC chopper technique. The AC chopper changes the amplitude of the input source voltage with the same frequency. The conventional dimming controller is operated by controlling voltage phase with the triac. It has bad characteristics of the input current THD and the input power factor But the dimming controller using the ac chopper technique has a low current THD and a good power factor. The developed dimming controller is consist of the IGBT and the low pass filter. The system is operated by the variation circuit of the input source voltage and the microprocessor.
Keywords
AC chopper; Dimming; THD;
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