A single-stage high-power-factor electronic ballast is designed for fluorescent lamps with dimming capability. The circuit configuration is originated from the integration of the half-bridge resonant inverter and the buck-boost converter. The buck-boost converter is designed to operate in discontinuous conduction mode (DCM) to provide nearly unit power factor at a fixed switching frequency. With asymmetrical pulse-width-modulation (APWM), the lamp power can be effectively regulated. The power switches of the inverter exhibit either zero-voltage-switching (ZVS) or zero-current-switching (ZCS) over the whole dimming range. Design equations are derived and computer analyses are performed based on a power-dependent lamp model and fundamental approximation. Design guidelines for determining circuit parameters are provided. A prototype circuit for a T8-36W fluorescent lamp is built and tested to verify the analytical predictions.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0621100-222626 |
| Date | 21 June 2000 |
| Creators | Yang, Dong-Yi |
| Contributors | Chin-Sien Moo, Tsai-Fu Wu, Tsair-Rong Chen, Chih-Chiang Hua |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0621100-222626 |
| Rights | unrestricted, Copyright information available at source archive |
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