AN IMPROVED QUADRATIC COUPLED HIGH GAIN CONVERTER

Rong Desheng; Ye Chen; Sun Xuanjin

doi:10.19912/j.0254-0096.tynxb.2024-0326

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (7) : 598-605. DOI: 10.19912/j.0254-0096.tynxb.2024-0326

Special Topics of Academic Papers at the 91th Annual Meeting of the China Association for Science and Technology

AN IMPROVED QUADRATIC COUPLED HIGH GAIN CONVERTER

Rong Desheng, Ye Chen, Sun Xuanjin

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Abstract

To enhance the converter’s gain effectively, a novel voltage doubling unit is introduced, which combines the coupling inductance with the switching capacitor. This unit not only amplifies the gain but also suppresses the current of the switching capacitor and clamps the coupling inductance, thereby facilitating soft switching of some diodes. A dual-switching-tube quadratic structure is developed to ensure continuous input current while significantly reducing the voltage stress on the switching tubes. The article thoroughly examines the operational modes and working principles of the proposed converter under various conditions and presents the voltage and current waveforms of the device. Compared with converters of the same type, the high gain and low stress characteristics of the proposed converter are prominently exhibited. Experimental validation of the theoretical derivation and analysis is further substantiated through the construction of a 200 W prototype.

Key words

high gain / coupled inductor / voltage stress / soft switch / quadratic Boost converter / double voltage unit

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Rong Desheng, Ye Chen, Sun Xuanjin. AN IMPROVED QUADRATIC COUPLED HIGH GAIN CONVERTER[J]. Acta Energiae Solaris Sinica. 2025, 46(7): 598-605 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0326

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