Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Interval modulation method applied to wide‑output‑range dc‑dc converters

  • Mei Liang (School of Electrical and Control Engineering, North China University of Technology) ;
  • Yuzhe Jiao (School of Electrical and Control Engineering, North China University of Technology) ;
  • Jiwen Chen (School of Electrical and Control Engineering, North China University of Technology) ;
  • Pengyu Jia (School of Electrical and Control Engineering, North China University of Technology)
  • Received : 2024.07.30
  • Accepted : 2025.01.19
  • Published : 2025.08.20
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Abstract

This paper presents a dc-dc converter that can achieve efficient power conversion with a wide-output-range. The converter adds active switches, diodes, and inductors to the outputs of isolated dc-dc converters to realize a wide output voltage range. Besides, an interval modulation method is applied to this converter. The input voltage and the duty ratios of the active switches are controlled to modulate the output voltage in the different intervals. With this approach, high efficiency in the whole output voltage range can be achieved. The operating principles and modulation method are illustrated. An experimental prototype is built to verify the effectiveness of the proposed converter.

Keywords

Acknowledgement

This research was funded by National Key R&D Program of China, grant number 2021YFF0700102 and Beijing Natural Science Foundation, grant number 3232044.

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