Abstract
In this paper, a soft switched non-isolated high step-up DC-DC converter based on combination of buck-boost and switched resonator converters is proposed which is the combination of a buck-boost and a switched resonator converter. To reduce the converter semiconductor elements, one switch of the switched resonator structure is shared with the buck-boost structure. Soft switching condition for both switches is established without using any axillary switch, also, all diodes except one are turned OFF under ZCS condition which has mitigated the reverse recovery problem. Semiconductor elements soft-switching operation has reduced the converter switching losses and contributed to increased efficiency. In the continuation of this article, the proposed converter operational principle and steady-state analysis are discussed. The proposed converter is simulated by PSpice software at 24V input, 350V output and 200W, and results are presented. The simulation results confirm the converter analysis and operation.
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