Design of Feedback-Controlled Frequency-Modulation Electronic Ballast and Dimming System

• Main Authors: LIN HSING-HUNG, 林興鴻
• Other Authors: G. C. Hsieh
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/27270834683597567740

碩士 === 國立臺灣科技大學 === 電子工程系 === 87 === This thesis proposes the realization study of microprocessor-based dimming system which integrates multiple sets of frequency-modulation electronic ballasts with sequential control. First of all, this paper analyzes the resonant topology of the ballast and its proper selection of switching frequency. Zero-voltage switching technique is employed to raise the ballast efficiency. Second, the utilization of K-factor approach for achieving the analysis and synthesis of dimming feedback compensation are proposed. Programmable ability of 8051 single-chip microprocessor is adopted with the photo-sensing component to realize multiple-ballast dimming system with scheduled setting function. Finally, design considerations for ballast circuit with dimming is explored. A prototype design of single-chip-controlled electronic ballast is conducted to assess the system performance.