Arc stabilization in metal halide lamps using a post-regulator working at the zero-duty-cycle boundary

被引：0

作者：

Ribas, J. ^{[1
]}

Cardesin, J. ^{[1
]}

Dalla-Costa, M. ^{[1
]}

Alonso, J. M. ^{[1
]}

Calleja, A. J. ^{[1
]}

机构：

[1] Univ Oviedo, DIEECS Tecnol Electron, Gijon 33204, Spain

来源：

2007 IEEE INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS, PROCEEDINGS, VOLS 1-8 | 2007年

关键词：

metal halide lamps; arc stabilization; non-linear post-regulator;

D O I：

10.1109/ISIE.2007.4375103

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

The most commonly used power topology to drive metal halide lamps is based in three cascaded stages. The first stage is used for power factor correction, the second stage is used to stabilize the discharge and the last stage is used to turn the DC output of the previous stage to a low frequency AC square waveform suitable to supply the lamp. The dynamic impedance of the lamp does not allow using the power factor correction stage to stabilize the discharge. This is due to the fact that voltage in the bulk capacitor can not be changed fast enough to stabilize the lamp current. In this paper, a boost-type post-regulator working at the zero-duty-cycle limit is proposed to stabilize the discharge. This way, a non-linear post-regulator with very high efficiency is obtained. A simplified procedure to design the regulator is also presented in this paper. A laboratory prototype has been built to verify the proposed procedure.

引用

页码：3057 / 3061

页数：5