Title :
A novel two-stage high-power-factor low-frequency HID electronic ballast
Author :
Liang, Tsomg-Juu ; Cheng, Chun-An ; Lai, Wen-Shang
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
A novel two-stage, high-power-factor electronic ballast used to drive high-intensity discharge lamps is proposed in the paper. The ballast consists of a flyback-type input current shaper to achieve power factor correction and a half-bridge-type inverter to supply the lamp with low-frequency square-wave current. Owing to its low-frequency operation, no acoustic resonance occurs. The features of the ballast are cost-effective, low total-harmonic-distortion (THD), high power factor (PF>0.99). Operational principles, design equations and simulated results of one 70-W HID lamp operating at 400 Hz switching frequency with 110 V-rms line input voltage are presented.
Keywords :
discharge lamps; lamp accessories; power factor correction; 110 V; 400 Hz; 70 W; electronic ballast; half-bridge-type inverter; high intensity discharge lamps; low-frequency square-wave current; power factor correction; switching frequency; total-harmonic-distortion; Drives; Electronic ballasts; Equations; High intensity discharge lamps; Inverters; Power factor correction; Reactive power; Resonance; Switching frequency; Voltage;
Conference_Titel :
Industrial Electronics Society, 2003. IECON '03. The 29th Annual Conference of the IEEE
Print_ISBN :
0-7803-7906-3
DOI :
10.1109/IECON.2003.1280658
