| Title |
Digital Control of Low-Frequency Square-Wave Two-Stage Electronic Ballast for HID Lamps with Resonant Ignition and High Efficiency |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2013.27.2.069 |
| Keywords |
HID(High Intensity Discharge) ; Resonance Ignition ; Acoustic Resonance ; Low Frequency Square-Wave |
| Abstract |
In this paper, electronic ballast using resonant inverter for HID lamp is designed and implemented. The proposed electronic ballast is used the soft switching technology ZVS(Zero Voltage Switching) to reduce turn-on and turn-off loss. The ignition of proposed electronic ballast is achieved by controlling a full bridge inverter which is consisted of LC filter for resonance. After ignition the ballast operates as a low frequency square wave inverter by controlling a full bridge inverter as a buck converter. After ignition at resonant frequency of fo=160kHz, the switching frequency of a buck converter is consisted of 50kHz of high frequency and 170Hz of low frequency. This is for attenuating high frequency harmonics and avoiding acoustic resonance. The experimental results show that electronic ballast using resonant inverter is operated stably. |