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Full-bridge soft switching PWM converter with saturable inductors at the secondary side

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3 Author(s)
Kwon, B.-H. ; Dept. of Electron. & Electr. Eng., Pohang Univ. of Sci. & Technol., Kyungbuk, South Korea ; Kim, J.H. ; Jeong, G.-Y.

An improved full-bridge (FB) soft switching DC-DC converter with saturable inductors at the secondary side is presented and analysed. The main devices are switched on under zero-voltage conditions using the energy stored in the secondary saturable inductors. On the other hand, the secondary diodes are switched off under zero-current conditions due to the large inductance of the saturable inductors when it is not saturated. The advantages of this converter include a wide load range with zero-voltage-switching (ZVS) and zero-current-switching (ZCS), a large effective duty ratio, and no secondary voltages spikes, in addition to high power density and high efficiency. Experimental results obtained on a 6 kW prototype are discussed,

Published in:

Electric Power Applications, IEE Proceedings -  (Volume:146 ,  Issue: 1 )

Date of Publication:

Jan 1999

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