Digital Control Methods of Two-Stage Electronic Ballast for Metal Halide Lamps with a ZVS-QSW Converter


Vol. 10, No. 5, pp. 451-460, Sep. 2010
10.6113/JPE.2010.10.5.451


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 Abstract

This paper presents a new kind of digital control metal halide lamp electronic ballast. A zero-voltage-switch quasi-square-wave (ZVS-QSW) dual Buck converter is adopted here. In this paper, a digital control method is proposed to achieve ZVS for the converter. This ZVS can be realized during the whole working condition. Single-cycle-peak-current control is proposed to solve the problem of excessive inductor current during a low-frequency reversal transient. Power loop control is also realized and its consistency for different lamps is good. An AVR special microcontroller for a HID ballast is used to raise the control performance, and the low-frequency square-wave control method is adopted to avoid acoustic resonance. A 70W prototype was built in the laboratory. Experimental results show that the electronic ballast works reliably. Furthermore, the efficiency of the ballast can be higher than 92%.


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Cite this article

[IEEE Style]

Y. Wang, X. Zhang, W. Wang and D. Xu, "Digital Control Methods of Two-Stage Electronic Ballast for Metal Halide Lamps with a ZVS-QSW Converter," Journal of Power Electronics, vol. 10, no. 5, pp. 451-460, 2010. DOI: 10.6113/JPE.2010.10.5.451.

[ACM Style]

Yijie Wang, Xiangjun Zhang, Wei Wang, and Dianguo Xu. 2010. Digital Control Methods of Two-Stage Electronic Ballast for Metal Halide Lamps with a ZVS-QSW Converter. Journal of Power Electronics, 10, 5, (2010), 451-460. DOI: 10.6113/JPE.2010.10.5.451.