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Design consideration for the improved Class-D inverter topology

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3 Author(s)
Byoung-Kuk Lee ; Dept. of Electr. Eng., Hanyang Univ., Seoul, South Korea ; Bum-Seok Suh ; Dong-Seok Hyun

The characteristics and the superiority of the efficient snubber network for Class-D series resonant inverters are addressed in detail by comparison with conventional snubbers, i.e., the lossless capacitive snubber and the RC snubber, with respect to switching losses, overvoltage stresses, high-frequency resonant current stresses, and overall efficiency. Also, the optimal design scheme for it is considered and the analytical equations are derived in order to provide a straightforward and easy-to-design tool. The validity of the theoretical description is verified by testing on a 29-kHz MOSFET Class-D series resonant inverter rated at 1.2 kW

Published in:

IEEE Transactions on Industrial Electronics  (Volume:45 ,  Issue: 2 )