Abstract
In this article, a quasi-switched boost converter based on the switched-capacitor technique with high step-up voltage capability is dealt with and analyzed. The proposed converter offers a simple structure and low voltage stress on the semiconductor elements with intrinsic small duty cycle. An inductor of the proposed converter is connected in series with the input voltage source; therefore, continuous input current ripple is attainable. In addition, the efficiency of the proposed converter is also improved. A detailed steady-state analysis is discussed to identify the salient features of the switched-capacitor-based quasi-switched boost DC-DC converter. The performance of the converter is compared against similar existing high boost DC-DC converters. Finally, the switched-capacitor-based quasi-switched boost DC-DC converter is investigated by experimental verification.
Highlights
It can be seen that S1 is turned on 50% of the period, while S2 is turned on with the duty cycle of D
It can be observed that the duty cycle is large when Vi = 20 V leads to decrease the efficiency of the converter
A switched-capacitor-based quasi-switched boost DC-DC converter is presented in this article for low power and highquasi-switched step-up voltageboost conversion contribuA switched-capacitor-based converter is The presented in tions of the include: providing a high voltage capability with small duty cycle, this article for low power and high step-up voltage conversion applications
Summary
The deployment of the renewable energy sources includes photovoltaic, and fuel cells have grown significantly over the past decade. The duty cycle of the mentioned conventional boost non-isolated DC-DC is operated in wide range, and the range of duty cycle is varied between 0 and 1 In this case, the high voltage gain can be obtained with large duty cycle value, which causes to produce power loss on power active switches. To limit the range of duty cycle operated within (0, 0.5) and improve the voltage gain, the Z-source and quasi-Z source configurations are considered as good solutions [14,15,16,17] The shortages of these topologies are discontinuous input current and complex topological structure. To enhance the practical high-voltage conversion and reduce the duty cycle ratio, a new transformer-less quasi-switched boost DC-DC converter with integrating switched-capacitor network will be determined.
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