期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 36, 期 1, 页码 228-238出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2020.3000244
关键词
Inverters; Coils; Topology; Capacitors; Electric potential; Switches; Wireless power transfer; High-voltage and high-power; input-series output-equivalent-parallel inverter (ISOEP); input voltage sharing; wireless power transfer (WPT)
资金
- National Natural Science Foundation of China [51677139, 61703311]
- China Postdoctoral Science Foundation [2017M620335]
- Shenzhen Science and Technology Innovation Committee [JCYJ2017081811280674]
This study presents a multi-inverter system for high-power wireless power transfer, which achieves higher efficiency and can meet different voltage and power requirements. The research analyzes the factors that may lead to voltage unbalance, and adopts capacitor suppression and duty cycle adjustment to achieve input voltage sharing.
This article presents an input-series output-equivalent-parallel (ISOEP) multi-inverter system for high-power wireless power transfer (WPT), where preisolation dc/dc converter is concealed to achieve higher efficiency, and the number of inverter modules is allowed to be flexibly adjusted to satisfy different voltage and power requirements. The main contribution of this article is to analyze the possible factors that may lead to voltage unbalance in the series inverters of the proposed ISOEP multi-inverter topology. At the same time, the dividing capacitor suppression and duty cycle adjustment are adopted to achieve input voltage sharing. To confirm and validate the effectiveness and merit of the proposed WPT system, a prototype consisting of three inverters connected in series was designed, built, and tested. Experiments show that the proposed topology achieved both high-power output and effective input voltage sharing. The maximum output power is 38.37 kW with an efficiency of 89.31%.
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