期刊
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
卷 68, 期 2, 页码 1155-1165出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2020.2967667
关键词
Bidirectional dc-dc converter (BDC); coupled inductor (CL); high voltage conversion ratio (VCR); nonisolated; switched capacitor (SC)
资金
- National Natural Science Fundation of China [61573155, 51877085]
- Guangdong Natural Science Foundation [2018A030313066]
- Fundamental Research Funds for the Central University of South China University of Technology (SCUT) [2018ZD50]
- Guangdong Key Laboratory of Clean Energy Technology
This article introduces a nonisolated bidirectional dc-dc converter based on coupled inductor and switched capacitor, which can achieve a high voltage conversion ratio. The converter utilizes pulsewidth modulation plus phase-shift control, enabling zero voltage switching under a wide operating range to improve power conversion efficiency.
In this article, a nonisolated bidirectional dc-dc converter is proposed based on coupled inductor (CL) and switched capacitor (SC). The converter can achieve a high voltage conversion ratio (VCR) by using CL and SC. The CL is operated not only as a filter inductor to regulate voltage but also as a transformer to improve the VCR. Furthermore, the voltage stresses of capacitors and switches are reduced by introducing SC structure. The pulsewidth modulation plus phase-shift control is employed, where the duty cycle is used to ensure that the voltages of two sides are matched and the phase-shift angle is used to control the direction and amount of power flow. In addition, all the switches can achieve zero voltage switching in both forward and backward modes under a wide operating range, which can improve the efficiency of power conversion. The operating principle and steady-state analysis are examined, and a 400-W prototype is designed to verify the validity of the proposed converter.
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