Implementation of High Power Factor Electronic Ballast for High Pressure Sodium Lamps

• Main Authors: Te-Chau Chen, 陳德超
• Other Authors: Tsair-Rong Chen
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/29447597429651321692

碩士 === 國立彰化師範大學 === 工業教育學系 === 87 === The purpose of this thesis was to develop an electronic ballast with high power factor for driving high pressure sodium(HPS) lamps. According to the characteristics of HPS lamps, a high-voltage ignition system is used to start the lamp. The main circuit of an electronic ballast is constructed by a serial resonant inverter. A high frequency AC signal is inverted from DC source by a serial resonant inverter using pulse width modulation technology. In order to improve the input power factor, a boost type power factor correction circuit is connected to the input stage to increase the power factor close to 1. The operational principles of the system are described first. Then, the circuit parameters of the ballast system for HPS lamps are determined by simulation and estimation. Finally, the simulation and experimental results were demonstrated on a high power factor electronic ballast prototype to verify the feasibility of the proposed system.