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New control strategy for a two-stage low-frequency square-wave electronic ballast for MHD lamp

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3 Author(s)
Jianbing Xu ; Coll. of Electr. Eng., Zhejiang Univ., Hangzhou, China ; Min Chen ; Zhaoming Qian

This paper presents a novel control strategy for a two-stage acoustic resonance free electronic ballast for high intensity discharge (HID) lamp. The ballast consists of a PFC stage, a low frequency half-bridge inverter with buck capability, and an igniter. A new control method proposed to control the half bridge inverter to supplies the lamp with low square wave current. A novel and simple method is proposed to conquer overshoot problem during output current inverting instant. The proposed control method was verified with experimental results.

Published in:

Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06.

Date of Conference:

19-23 March 2006