The operating characteristics of small-wattage metal halide lamps (35W, 70W, and 150W) are investigated. Included are acoustic resonance, luminous efficacy, and electrical characteristics at steady state. A laboratory electronic ballast is built to operate metal halide lamps with square-wave currents in a frequency range from 50 Hz up to 50 kHz. The operating frequency, amplitude and dead-time can be adjusted independently. Experimental results show that the luminous efficiency decreases slightly as the operating frequency increases but deteriorates considerably as the lamp power is reduced. By examining the acoustic resonance spectra, it is found that the lamp arc instability is highly related to the dead-time of the inverter. The investigated results provide useful information for the design of the electronic ballasts.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0623103-184632 |
| Date | 23 June 2003 |
| Creators | Chen, Kuan-Hsiung |
| Contributors | Tsorg-Juw Liang, Jia-You Lee, Chih-Chiang Hua, Jsair-Rong Chen, Chin-Sien Moo |
| 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-0623103-184632 |
| Rights | restricted, Copyright information available at source archive |
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