Modified A-Source Converter Operating at Lower Voltage Stress

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Abstract

The coupled inductor based Z-source converter produces higher voltage gain with lower number of components count. In this paper, a new two winding mutually coupled inductor based Z-source DC-DC converter is proposed to boost the voltage gain. The proposed converter utilizes reduced number of passive elements count to produce higher voltage gain specially in lower duty cycle range. Moreover, the coupled inductor winding are arranged in auto-transformer fashion to maximize the effective turns ratio. Therefore, minimum number of winding turns are used for realizing the higher gain. The proposed converter draws continuous input current and has common grounding which are attractive features for hybrid electric vehicle powered by renewable sources. Furthermore, the voltage stress across the different components is reduced for the proposed converter. The operation, steady state analysis and comparative analysis is presented for the proposed converter. Finally, an experimental setup of 215 W is designed and tested to show the feasibility of the proposed converter.

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Kumar, A., Wang, Y., Pan, X., Xiong, X., Reza, M. M., & Jaafari, K. A. (2019). Modified A-Source Converter Operating at Lower Voltage Stress. IEEE Access, 7, 179670–179678. https://doi.org/10.1109/ACCESS.2019.2958373

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