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A Novel Half-Bridge Resonant Inverter With Load Free-wheeling Modes  

Yeon Jae-Eul (Dept. of Mechatronics Engineering, Hanyang Univ.)
Cho Kyu-Min (Dept. of Information and Communication, Yuhan College)
Kim Hee-Jun (School of Electrical & Computer Science Engineering, Hanyang Univ.)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SC / v.42, no.3, 2005 , pp. 71-80 More about this Journal
Abstract
This paper proposes a new circuit topology of the half-bridge resonant inverter and presents its digital control scheme. As the proposed half-bridge inverter can be operated in the load-freewheeling modes, pulse width modulation (PWM) control method can be used for the output power control. The proposed half-bridge inverter can keep unity output displacement factor under the load-impedance varying conditions, if a new PWM control scheme based on the resonant frequency tracking algorithm is adopted. In this paper, the operation principle, electrical characteristics and detailed digital control scheme of the proposed half-bridge resonant inverter and loss analysis comparing with a conventional half bridge inverter is described. The experimental results of the proto-type experimental setup to verify the validity of the proposed half-bridge resonant inverter are presented and discussed.
Keywords
Resonant frequency tracking algorithm; Resonant Inverter; Load Free-Wheeling Modes;
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