Abstract: In order to further improve voltage gain and conversion efficiency，and reduce the input current ripple
of the coupled inductance converter． a high gain DC /DC converter based on coupled inductance ripple with low
input current is proposed． By introducing passive zero-ripple circuit，the ripple of input current and the stress of
input current are reduced． The high gain characteristics of the converter can be realized by reasonably designing
the coupled inductance ratio． The theoretical analysis and simulation results show that the converter has the
following advantages． Soft switch is realized in all switch tubes，and the switching loss is reduced． The voltage
stress of all components is much lower than the output voltage，which is beneficial to reduce the conduction loss
and improve the performance of the converter．

Key words: coupled inductance, low input current ripple, high gain, voltage stress