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Zero-voltage and zero-current switching full bridge DC-DC converter for arc welding machines

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2 Author(s)
Seong-Jeub Jeon ; Dept. of Electron. Eng., Pukyong Nat. Univ., Pusan, South Korea ; Gyu-Hyeong Cho

A new zero voltage and zero current switching (ZVZCS) full bridge DC-DC converter with transformer isolation is proposed for arc welding machines. The proposed DC-DC converter uses an auxiliary transformer to obtain ZCS for the leading leg, which provides load current control capability even under short circuit conditions. The power rating of the auxiliary transformer is /spl sim/10% or more of the main transformer. The operation is verified by experiments.

Published in:

Electronics Letters  (Volume:35 ,  Issue: 13 )