CONCLUISION

In this article, a coupled inductor buck-boost converter based dual switches is presented. The circuit has many advantages are as follow: (1) combing the passive clamp circuit to suppress the generation of power switching voltage spikes and recover the leakage energy; (2) the high voltage gain and wide conversion ratio can be achieved by changing the turns ratio of the coupled inductor and duty cycle; (3) common ground between input sources and load; (4) continuous input current. Steady-state analysis and design of components are presented in detail. Power loss analysis and comparison with some key characteristics of other converters are also presented and discussed. Finally, the results of the implemented prototype verify the correctness of the theoretical analysis, while the maximum efficiency in step-up mode and step-down mode are 95.7% and 96.8%, respectively.