Low voltage side current zero ripple bidirectional converter with high gain and soft-switching
A non-isolated bidirectional DC-DC converter is proposed in this paper,which realizes zero ripple of low voltage side current by optimizing the coupling inductor.The proposed converter also has the advantages of high voltage gain(G=(1+D)/(1-D)in boost mode),reduced switch(only three),lower voltage stress(about half of the high voltage side voltage),and zero-voltage-switching for all switches.In addition,it requires only one magnetic core,and the input and output sides share the common ground.The working principle,steady-state characteristics,conditions of low voltage side zero current ripple,soft switching conditions and parameter design methods of the proposed converter are depth analyzed,and then verified by a 250 W/100 kHz simulation prototype.
DC-DC converterhigh voltage gainbidirectionalzero current ripplesoft switching
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