Electronic ballast for HPS lamps with dimming control by variation of the switching frequency. Soft start-up method for HPS and fluorescent lamps.

被引：0

作者：

Branas, C ^{[1
]}

Azcondo, FJ ^{[1
]}

Bracho, S ^{[1
]}

机构：

[1] Univ Cantabria, Dept Elect Technol Engn Syst & Automat, Santander 39005, Spain

来源：

IECON '98 - PROCEEDINGS OF THE 24TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY, VOLS 1-4 | 1998年

关键词：

D O I：

暂无

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper presents the design of a resonant inverter that unifies the two basic functions of a ballast: the generation of an initial over-voltage and the current control after the start-up. The chosen topology is a half-bridge parallel resonant inverter (PRC); its behavior in the frequency domain is reviewed when driving a high-pressure sodium (HPS) lamp. The dimming control is performed by shifting the switching frequency of the resonant inverter within the range above resonance. The ignition of the lamp is divided into two periods: start-up time and warm-up time. A soft-start method minimizes the initial over-voltage applied to the lamp, and reduces the current stress an the circuit components. This method is also studied for fluorescent tubes. The experimental results are shown for the commercial HPS lamp OSRAM NAV70E and compared to the results achieved with the fluorescent tube SYLVANIA F-40.

引用

页码：953 / 958

页数：6