期刊
IET POWER ELECTRONICS
卷 12, 期 10, 页码 2626-2633出版社
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-pel.2018.5606
关键词
inductive power transmission; compensation; coupler misalignment performance; LC-CLC compensation topology; high-power; long-distance capacitive power transfer system; LC circuit; CLC circuit; capacitive coupler; fundamental harmonics approximation method; system working principle; output power; coupler capacitance; compensation circuit; misalignment conditions; high anti-misalignment performance; CPT system; transfer distance; power 1; 0 kW; size 150; 0 mm; power 1009; 0 W; size 325; 0 mm
To improve the coupler misalignment performance, this study proposes an LC-CLC compensation topology for high-power and long-distance capacitive power transfer system. The LC circuit in the transmitter and the CLC circuit in the receiver are adopted as the resonant tank for the capacitive coupler. The fundamental harmonics approximation method is employed to analyse the system working principle. Considering the misalignment of coupler, the characteristic of output power is provided against the variation of coupler capacitance. A 1 kW CPT system with 150 mm transfer distance is set up to validate the proposed compensation circuit under various misalignment conditions. The experiment results show that the system can transfer 1009 W output power with 90.56% DC-DC efficiency at 150 mm transfer distance when the coupler is well aligned. When the misalignment is 325 mm, the variation of the output power is only 10.6% in X-direction and 15.2% in Y-direction. The proposed system can achieve high anti-misalignment performance.
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