期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 35, 期 1, 页码 131-137出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2019.2914363
关键词
Compact receiver; inductor-capacitor-inductor-none (LCL-N) topology; magnetic flux cancellation; wireless charging; wireless power transfer (WPT)
资金
- Huawei Technologies Co. Ltd [9406139]
- Department of Energy, Argonne National Laboratory, US-China Clean Energy Center [DE-AC02-06CH11357]
In high-power electric vehicle wireless charging systems, the charging distance is short, and the coupling is strong in order to increase the power density and reduce the coil size and the system cost. With a strong coupling, the receiver-side compensation can be eliminated, and a high efficiency can still be obtained. The inductor-capacitor-inductor-none (LCL-N) topology is formed with the LCL compensation on the primary side. The phase difference between the transmitter and receiver currents is larger than 90 degrees, leading to the magnetic flux cancelation in the ferrites. Thus, the required ferrite thickness of the LCL-N topology is smaller than the fully-compensated topologies. Therefore, a compact, lightweight, and low-cost receiver structure is achieved with the omitted compensation and thinner ferrite. Moreover, the LCL-N topology can achieve zero voltage switching for all loading conditions, withstand open-circuit and short-circuit faults, and is suitable for constantcurrent and constant-voltage charging due to the fact that it has neither a CC nor a CV output characteristic. A 100-kW system is designed and simulated. A downscaled 1-kW system is implemented. The simulations and experimental results verify the effectiveness of the analysis.
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