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.