Analysis and Design of Self-Oscillating Full-Bridge Electronic Ballast for Metal Halide Lamp at 2.65MHz Operating Frequency
| Autor: | Yong-FaChen, 陳永發 |
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| Rok vydání: | 2010 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 98 This thesis presents the analysis and design of the self-oscillating full-bridge electronic ballast for the metal halide lamp at 2.65MHz operating frequency. In order to avoid the acoustic-resonance problem of the metal halide lamp and meet the EMI limitation by IEC regulation, the self-oscillating full-bridge electronic ballast is operated at 2.65MHz radio-frequency (RF). However, the effect caused by the gate-to-source capacitor Cgs of the MOSFETs on the self-oscillating gate-drive network becomes significant to influence the design of the operating frequency at RF. Therefore, the gate-to-source capacitor Cgs of the MOSFETs is considered to derive the design equation of the magnetizing inductor for the current transformer in the self-oscillating gate-drive network. Finally, based on the prototype circuit of a 35W self-oscillating full-bridge electronic ballast with constant-lamp-current control and no-lamp-protection scheme at 2.65MHz operating frequency, the SIMPLIS? simulation and experimental results are used to validate the effect from gate-to-source capacitor Cgs, the proposed design equation, and the design criteria. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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