Title :
Research on dimming control of microcontrollor-based electronic ballast for HPS lamps
Author :
Wang Maojun ; Xu Dianguo
Author_Institution :
Harbin Institute of Technology, Department of Electrical Engineering, No.92, West Da-Zhi Street, Harbin, China, Email: maojun1968@hit.edu.cn
Abstract :
A novel design of micro-controller-based dimmable electronic ballast for HPS lamps is presented in this paper. An easier and low-cost power control method is proposed in this paper. The lamp voltage and current are sensed through a multiplier, dimming control is realized by changing the frequency of the inverter. Driver signal with low frequency modulation generated from MCU is used to eliminate unstable arc during dimming state. Theoretical analysis and experimental results for the commercial HPS lamp Philips NAV250 show the feasibility of the proposed ballast.
Keywords :
Bridge circuits; Costs; Digital control; Driver circuits; Electromagnetic interference; Electronic ballasts; High intensity discharge lamps; Inverters; Switching frequency; Voltage control;
Conference_Titel :
Power Electronics Specialists Conference, 2006. PESC '06. 37th IEEE
Print_ISBN :
0-7803-9716-9
DOI :
10.1109/PESC.2006.1711915
