Proceedings. Efficiency improvement of electronic ballast. J-0457. IEEE Industry Applications Society Annual Meeting [5-9 Oct. 1997, New Orleans].

IEEE.
Takahashi, Yuuji. Kamata, Masahiko. Shimizu, Keiichi.

1997

660
SEPARATA

A novel approach is presented thet reduces losses of a half bridge inverter which is widely used as electronic ballast for discharge lamps. Most losses of electronic ballast are generated in semiconductor switches and ballast inductor. A loss of the inverter is, therefore, assumed to consist of the one of the switches and of the inductor. The requirement that the sum of these losses becomes minimun is determined. We applied the result to an experimental circuit, and obtained the efficience of 98.6. An operation point of the inverter block optimallydesigned in efficience is not statically made stable. We present one of the control methods, that input dc voltage of the inverter was controlled to regulated a lamp current to be rate amount. The entire circuit, including a rectifier, a preregulator, the inverter and the control circuit showed the efficiency of 94.6..

Presenta diagrs., gráfs. y tbls.

GENERAL; BALASTROS ELECTRONICOS; ILUMINACION; ASPECTOS TECNICOS; EFICIENCIA ENERGETICA; USO RACIONAL DE LA ENERGIA; REDUCCION DE PERDIDAS DE ENERGIA; METODOS;