A Small and High Efficiency Circuit Topology with Significantly Improved Trade-off Between Switching Losses and dv/dt for Series Connected Devices with Regenerative Snubber Circuits

抄録

This paper proposes a small and high efficiency circuit topology for series connected devices with regenerative snubber circuits. The proposed circuit topology introduces an important break-through in the trade-off between switching losses and dv/dt. Regenerative snubber circuits store most of the switching losses that occur in general circuits and regenerate at high efficiency. A 10kW-200V class prototype of the proposed circuit topology recorded a maximum efficiency of 99.49%, and a rated efficiency of 99.21%. Loss analysis of the prototype demonstrated no reduction in efficiency due to the regenerative operation by regenerative snubber circuits.