Title :
An electronic ballast with wide dimming range, high PF, and low EMI
Author :
Hui, S. Y Ron ; Lee, Leung Ming ; Chung, Henry Shu-Hung ; Ho, Y.K.
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
fDate :
7/1/2001 12:00:00 AM
Abstract :
The authors describe an electronic ballast design with the capability of low radiated and conducted EMI over a wide dimming range. It overcomes some limitations of traditional electronic ballasts that use frequency variation for dimming control. The proposed design allows soft switching of the ballast from full-power operation down to less than 10% power. Low-cost and low-voltage power metal oxide semiconductor field effect transmitters (MOSFETs) can be used in the proposed dimmable electronic ballast. The design approach is described and implemented successfully in a 2×36 W fluorescent lamp system
Keywords :
DC-AC power convertors; bridge circuits; electromagnetic interference; field effect transistor switches; fluorescent lamps; invertors; lamp accessories; lighting control; power MOSFET; power factor correction; power semiconductor switches; resonant power convertors; switching circuits; 36 W; 72 W; conducted EMI; dimming control; dimming range; electronic ballast design; fluorescent lamp system; frequency variation; half-bridge resonant invertors; low-voltage power MOSFET switches; radiated and conducted EMI; soft switching; Electromagnetic interference; Electronic ballasts; Energy consumption; Fluorescent lamps; Frequency; MOSFETs; Power factor correction; Resonance; Resonant inverters; Voltage;
Journal_Title :
Power Electronics, IEEE Transactions on
