A 6.6-kW High-Frequency Wireless Power Transfer System for Electric Vehicle Charging Using Multilayer Nonuniform Self-Resonant Coil at MHz
A 6.6-kW High-Frequency Wireless Power Transfer System for Electric Vehicle Charging Using Multilayer Nonuniform Self-Resonant Coil at MHz
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DOI：
10.1109/tpel.2021.3120734
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发表时间：
2022-04
影响因子：
6.7
通讯作者：
Ruiyang Qin;Jie Li;D. Costinett
中科院分区：
文献类型：
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作者：
Ruiyang Qin;Jie Li;D. Costinett
本文提出了一种用于电动汽车（EV）的大功率、高频无线电能传输系统，具有轻质、紧凑的线圈设计。利用多层非均匀自谐振线圈，无需外部电容进行补偿，并通过多个铜层之间共享电流来减轻高频传导损耗。提出的线圈的分析模型，并与200毫米半径的原型线圈制造和测试，实现了在3 MHz的品质因数超过450。两个线圈和GaN基功率级的优化设计进行了详细的和实验验证。实验测试表明，95.2%的直流-直流效率与6.6千瓦的功率传输通过100毫米的线圈到线圈的距离与52.5千瓦/平方米的功率密度。该系统展示了第一个6.6千瓦的无线电力传输系统，用于使用MHz的紧凑型自谐振线圈进行EV充电。
A high-power, high-frequency wireless power transfer system for electric vehicles (EVs) is proposed in this article with lightweight and compact coil design. Leveraging a multilayer nonuniform self-resonant coil, no external capacitor is needed for compensation and the high-frequency conduction loss is mitigated by sharing current between multiple copper layers. The analytical model for the proposed coil is provided, and prototype coils with 200-mm radius are fabricated and tested, achieving a quality factor over 450 at 3 MHz. The optimized design for both coils and a GaN-based power stage are detailed and validated experimentally. Experimental tests show 95.2% dc–dc efficiency with 6.6-kW power transferred across a 100-mm coil-to-coil distance with 52.5 kW/m2 power density. The system demonstrates the first 6.6-kW wireless power transfer system for EV charging using compact self-resonant coils at MHz.