期刊
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
卷 69, 期 5, 页码 5375-5380出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2021.3082061
关键词
Capacitors; Windings; Nonhomogeneous media; Parasitic capacitance; Resistance; Q-factor; Inductance; Coil loss; multilayer coil; parasitic capacitance; segment compensation
资金
- National Natural Science Foundation of China [51922033]
- Power Electronics Science and Education Development Program of Delta Group [DR EK2020003]
- Natural Science Foundation of Heilongjiang Province [YQ202 0E017]
Wireless power transmission technology is widely used in electric vehicles, consumer electronics, and other industries. This study proposes an improved coil winding method and compensation method to reduce coil loss caused by parasitic capacitors between layers, and to increase system efficiency.
Wireless power transmission technology is used to transmit energy without contact in the field of electric vehicles, consumer electronics, and other industries. Among them, there are some applications with very low coupling coefficient where multilayer coil needs to be wound. Influenced by the parasitic capacitor between layers, the loss of the multilayer coil increases. The improved coil winding method and compensation method are proposed in this letter. Winding coils following the same sequence from outside to inside in each layer and connecting capacitors in series between layers of the coil can significantly reduce the voltage of the layers' parasitic capacitor, which will decrease the coil loss. Compared with traditional method, the improved method increases the system efficiency at heavy load and light load by 0.74% and 2.48%, respectively. A 1-kW prototype was built with the maximum efficiency of 93.58%.
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