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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.
Highlights
The development of countries largely influenced several factors the transportation system
Based on the coupled inductor network, Trans Z-source [25], tapped inductor Z-source [26], isolated Z-source [27] etc. are reported which reduces the size, weight and cost of the converter. These coupled inductor topologies have discontinuous input current which increases the current stress on the input source
An improved version of the A-source converter is proposed in this paper which is suitable for electric vehicle applications
Summary
The development of countries largely influenced several factors the transportation system. Numerous Z-source topologies are reported to step up the voltage level in last decade [8] These topologies are important due to single stage power conversion due to which they offer better efficiency than the multistage conversion [9]. Anderson et al reported the quasi Z-source converter [12] where the presence of input inductor eliminates the the high start up current and provides continuous input current. To further improve the voltage gain of the converter, enhanced boost Z-source employing two Z-source network is reported at the cost of lower efficiency. Are reported which reduces the size, weight and cost of the converter These coupled inductor topologies have discontinuous input current which increases the current stress on the input source. The improved A-source converter utilizes the lower number of passive elements count along with it provides continuous input current and common grounding.
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