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http://dx.doi.org/10.5370/JEET.2007.2.2.249

A New Half-bridge Resonant Inverter with Load-Freewheeling Modes  

Yeon, Jae-Eul (Visual System Team/HVFPG, Fairchild Semiconductors)
Cho, Kyu-Min (Dept. of Information and Communications, Yuhan College)
Kim, Hee-Jun (School of Electrical Engineering and Computer Science, Hanyang University)
Publication Information
Journal of Electrical Engineering and Technology / v.2, no.2, 2007 , pp. 249-256 More about this Journal
Abstract
This paper presents a new circuit topology and its digital control scheme for a half-bridge resonant inverter. As the proposed half-bridge inverter can be operated in load-freewheeling modes, the pulse-width modulation (PWM) method can be used for the output power control. The proposed half-bridge inverter is based on the resonant frequency-tracking algorithm with the goal of maintaining the unity of the output displacement factor of the load impedance even in varying conditions. In this paper, the operation principle, electrical characteristics, and detailed digital control scheme of the proposed half-bridge resonant inverter are described. The experimental results of the prototype experimental setup to verify the validity of the proposed half-bridge inverter are presented and discussed.
Keywords
High displacement factor control method; Load freewheeling modes; Resonant current tracking algorithm; PWM Half bridge resonant inverter;
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