HIGH GAIN DC-DC CONVERTER WITH IMPROVED COUPLED INDUCTOR VOLTAGE MULTIPLIER CELL

Ding Xinping, Zhang Pengcheng, Zhang Chunlin, Yan Zhiqiang, Dai Wanyi

Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (3) : 594-603.

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (3) : 594-603. DOI: 10.19912/j.0254-0096.tynxb.2024-1896

HIGH GAIN DC-DC CONVERTER WITH IMPROVED COUPLED INDUCTOR VOLTAGE MULTIPLIER CELL

  • Ding Xinping, Zhang Pengcheng, Zhang Chunlin, Yan Zhiqiang, Dai Wanyi
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Abstract

A high gain DC-DC converter with an enhanced coupled inductor voltage multiplier cell is presented. This converter is particularly suitable for elevating the relatively low voltage of a photovoltaic panel to the voltage level necessary for a high voltage DC bus. The proposed converter comprises a Sepic network in the front stage and an improved coupled inductor voltage multiplier cell in the back stage. It exhibits several notable advantages, such as high gain, low ripple, low switching voltage stress, light weight and high efficiency. By modifying the connection between the boost unit and the coupled inductor, the voltage of the energy storage capacitor can be further augmented using improved coupled inductor voltage multiplier cell. In comparison with converters described in other literature, the proposed converter achieves higher voltage gain at low and medium duty cycles while employing the same or a similar number of components. The low input current ripple is beneficial for prolonging the operational lifespan of both the PV panel and the converter. The clamp circuit effectively suppresses the voltage spikes across the switchirg device, thereby enhancing the operating conditions of the switching device and improving the electromagnetic environment of the converter. Firstly, a comprehensive analysis of the working principle and steady-state of the proposed converter was conducted. Then a comprehensive comparison was made with other recent converters to illustrate the unique characteristics and advantages of the proposed converter. Finally, a 200 W prototype was designed in the laboratory, and the measured waveforms successfully validated the accuracy of the theoretical analysis of the proposed converter.

Key words

DC-DC converter / coupled inductor / voltage multiplier cell / high voltage gain

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Ding Xinping, Zhang Pengcheng, Zhang Chunlin, Yan Zhiqiang, Dai Wanyi. HIGH GAIN DC-DC CONVERTER WITH IMPROVED COUPLED INDUCTOR VOLTAGE MULTIPLIER CELL[J]. Acta Energiae Solaris Sinica. 2026, 47(3): 594-603 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1896

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