| Title |
Development of Electronic Ballast for Metal Halide Lamp with Free Voltage Input |
| Abstract |
HID(high intensity discharge)lamps include high pressure mercury lamp, high pressure sodium lamp and metal halide lamp. Metal halide lamps have been considered to be one of the most effective light sources. These lamps have good efficiency, good color rendering and good focusing capability. The objective of this research is to turn on the metal halide lamp(MH70W) by the developed electronic ballast with free voltage input(AC 100～277V). The developed electronic ballast consists of a free voltage input converter, a flyback converter & half-bridge inverter, ignitor & protector and controller. Experimental results show that developed electronic ballast turns on the metal halide lamp(MH70W) with free voltage input(AC 100～277V) very well. |