Fluorescent Lamp Electronic Ballast Dimmable Design without Striation
| Autor: | Lin, Tzu-Min, 林子閔 |
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| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 The objective of this paper is to propose an novel fluorescent lamp ballast which is controlled by odd symmetrical duty-cycle control method. The proposed ballast can reach a highly efficient dimming and improve the striation of lamp when it operates at low luminance. When decrease the fundamental wave amplitude to decrease the luminance of lamp, odd symmetrical duty-cycle control method will increase the component of even harmonic wave simultaneously, especially for 2nd harmonic wave. Therefore it can effectively interrupt the generation of striation. The proposed ballast will not contain hiding dc current, so it will not produce unbalanced operation of switches. The circuit is designed in resonant inverter and operates at continuous conduction mode, so it can achieve zero voltage switching and reach high efficiency. Different dimming methods will be discussed by using mathematical model and simulation software. At last the practical fluorescent lamp dimming electronic ballast controlled by odd symmetrical duty-cycle control method will be realized. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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