High efficiency metal halide discharge lamp ballast with an internal igniter and low ripple lamp current

被引：5
|
作者：
Lee, I. K. [1 ]
Cho, B. H. [1 ]
机构：
[1] Seoul Natl Univ, Sch Elect Engn, Seoul 151742, South Korea
来源：
IET ELECTRIC POWER APPLICATIONS | 2007年 / 1卷 / 03期
关键词：
D O I：
10.1049/iet-epa:20060315
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This is a proposal for a half-bridge type metal halide discharge (MHD) lamp ballast with a coupled inductor and a frequency-controlled synchronous rectifier. To avoid using an external igniter, the internal LC resonance of a buck converter is used to generate a high-voltage pulse for the ignition. A coupled inductor filter is used for steady state ripple cancellation. This filter allows the MHD lamp to avoid the acoustic resonance phenomenon. To improve the efficiency of the ballast, a synchronous buck converter is used for the DC/DC converter stage and a frequency control method is proposed. This scheme reduces the circulation current and turn-off loss of the metal-oxide semiconductor field effect transistor (MOSFET) switch in the constant power operation, which results in an increase of the efficiency of the ballast system compared to fixed frequency control. A front-end power factor correction circuit is included in the ballast. This proposal As verified with hardware experiments.
引用
收藏
页码：291 / 298
页数：8
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