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A High Frequency Multiphase Modular Hybrid Transformerless DC/DC Converter for High-Voltage-Gain High-Current Applications

Author

Listed:
  • Hu Xiong

    (State Grid Hubei Electric Power Research Institute, No.227 Xudong Avenue, Wuhan 430077, China)

  • Jiayuan Li

    (State Grid Hubei Electric Power Research Institute, No.227 Xudong Avenue, Wuhan 430077, China)

  • Bin Xiang

    (State Grid Hubei Electric Power Research Institute, No.227 Xudong Avenue, Wuhan 430077, China)

  • Xiaoguang Jiang

    (State Grid Hubei Electric Power Research Institute, No.227 Xudong Avenue, Wuhan 430077, China)

  • Yuan Mao

    (College of Information Engineering, The Zhejiang University of Technology, Hangzhou 310023, China)

Abstract

In order to meet the demands of desirable efficiency, transformerless DC/DC equipment with great voltage step-down are inevitable needed. This research offers a unique type of high-frequency, high-voltage-gain DC/DC converter, which comprises a switched capacitor (SC) converter and a buck converter. Thanks to the transformation of a two-stage converter to a single-stage converter, it has a considerable ratio of step-down voltage transformation and a reasonable duty cycle. In addition, it can permit low voltage stress on the switches. The simple control method and easy driving circuit implementation makes it scalable for high-power-level devices. Low cost can be realized as fewer components are needed. Under all operational circumstances, total soft-charging and low equipment voltage stresses are accomplished. Compared to those classic high-voltage-gain converters, the proposed converter exhibits merits of higher efficiency, higher flexibility, lower ripples, and lower costs. A comprehensive analysis is carried out for the converter’s steady-state operations. With a 1 MHz switching frequency, a 900 W prototype of a 20-time converter is constructed, with a peak efficiency of 92.5%. Simulations and experiments verify the effectiveness of the theoretical investigation of the converter’s operation.

Suggested Citation

  • Hu Xiong & Jiayuan Li & Bin Xiang & Xiaoguang Jiang & Yuan Mao, 2023. "A High Frequency Multiphase Modular Hybrid Transformerless DC/DC Converter for High-Voltage-Gain High-Current Applications," Energies, MDPI, vol. 16(6), pages 1-17, March.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:6:p:2518-:d:1089847
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    References listed on IDEAS

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    1. Hassan M. H. Farh & Mohd F. Othman & Ali M. Eltamaly & M. S. Al-Saud, 2018. "Maximum Power Extraction from a Partially Shaded PV System Using an Interleaved Boost Converter," Energies, MDPI, vol. 11(10), pages 1-18, September.
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