期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 37, 期 1, 页码 1102-1117出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2021.3097344
关键词
Couplings; Integrated circuit modeling; C plus plus languages; Reactive power; Couplers; Topology; Capacitors; Capacitive power transfer (CPT); electric field resonance; parameter design; reactive power optimization; wireless power transfer (WPT)
资金
- National Natural Science Foundation of China [51607081]
- National Key Research and Development Plan [2017YFB0103203]
Wireless power transfer (WPT) is more convenient and safer than conductive charging for power consumer electronics, biomedical devices, and transportation systems. Capacitive power transfer (CPT), as an alternative with better misalignment tolerance, lower cost, and weight, is becoming more attractive.
Wireless power transfer (WPT) is more convenient and safer than conductive charging for power consumer electronics, biomedical devices, transportation systems, etc. Inductive power transfer is the most widely studied and commercialized WPT technique; however, capacitive power transfer (CPT) is becoming an attractive alternative, offering better misalignment tolerance and lower cost and weight. The electrical-field-resonance-based six-plate coupler system is one of the most typical configurations for high-performance CPT systems, but the associated large number of circuit parameters is always a critical issue for system design. In this article, a parameter optimization method is proposed for this topology. The ratio of the reactive power in the compensation network to the system transferred power is set as the main optimization goal. To solve the high-order optimization problem, a two-stage method is proposed to significantly reduce the optimization complexity while providing the optimized parameters of the whole system. To verify the effectiveness of this method, a 3-kW, 1-MHz CPT system with a 16-pF coupling capacitor is built. Both the simulation and experimental results show that the optimized parameters effectively improve the system efficiency, experimentally achieving 95.7% dc-dc overall efficiency under a 100-mm gap distance at the rated power.
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