Soft Switching of Half-Bridge Converter Using Core Saturation, Vol.J86-B,No.3, pp.552-559

概要

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A method of soft switching in the half bridge inverter using a small saturating core is presented. For the soft switching, a small dead time of both switch off is made in a pair of MOSFET switch. The saturating core is of rectangular magnetization characteristics and the core flux swings from the minus to the plus saturation during ON time of the switch. The soft switching is realized in dead time by a resonance between the saturating inductance of the core and the stray capacitance of MOSFET. As an extension of this concept, instead of the saturating core, we propose a new soft swicthing circuit using a linear inductance and two switches, which is especially suitable for regulating the output and also for high frequency switching. A theoretical principle of soft switching presented here was confirmed by experiments on a half bridge converter of 1.25 kW.
社団法人電子情報通信学会の論文
2003-03-01