A study of control method for electronic ballast for electrodeless lamp

Abstract

High efficacy 50-W type electronic ballast for electrodeless lamp was developed. The drive frequency was decreased from the conventional 13.56 MHz to 135 kHz, and the circuit efficacy was improved from 78 to 91%.Setting up the high voltage maintenance period after the start sweep period enabled shade place start better.The spreads of the electrodeless lamp to the landscape and traffic lighting such as street light and tunnel light are expected.