Digital control of a low-frequency square-wave electronic ballast with resonant ignition

被引：32
|
作者：
Diaz, F. Javier [1 ]
Azcondo, Francisco J. [1 ]
Casanueva, Rosario [1 ]
Branas, Christian [1 ]
Zane, Regan [2 ]
机构：
[1] Univ Cantabria, Dept Elect Technol Syst & Automat Engn, E-39005 Santander, Spain
[2] Univ Colorado, Dept Elect & Comp Engn, Boulder, CO 80309 USA
来源：
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2008年 / 55卷 / 09期
关键词：
acoustic resonance; digital control; dimming control; low-frequency square-wave (LFSW) converter; metal halide (MH) lamps; resonant ignition;
D O I：
10.1109/TIE.2008.927959
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 proposes a two-stage low-frequency square-wave (LFSW) electronic ballast with digital control. The first stage of the ballast is a power factor correction (PFC) stage, and the second is a full-bridge (FB) converter used for both lamp ignition and LFSW drive. As a novelty for LFSW ballasts, ignition is achieved without an additional igniter circuit by operating the FB during start-up as a high-frequency resonant inverter. After ignition, the converter operates as an LFSW inverter to avoid exciting acoustic resonances by controlling the FB as a buck converter and regulating alternately positive or negative current to the lamp. Lamp power is regulated by adjusting the average current supplied by the PFC stage. Another contribution of this paper is to utilize digital control as a simple solution to achieve multimode control, including resonant lamp ignition, LFSW transitions, and lamp current and power regulation.
引用
收藏
页码：3180 / 3191
页数：12
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