期刊
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
卷 68, 期 12, 页码 12771-12780出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2020.3044798
关键词
Wireless power transfer; Switches; Substrates; Couplings; Conferences; Conductors; Transducers; Misalignment; stacked coils; transfer efficiency; transfer null; wireless power transfer (WPT)
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2020R1A2C1010251]
- National Research Foundation of Korea [2020R1A2C1010251] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A stacked-coil technology has been demonstrated to address lateral misalignment in nonradiative wireless power transfer systems. The system consists of multiple layers of coils with various sizes, allowing for the best transfer efficiency coil pair to be switched on depending on the misalignment. Experimental results show that the transfer efficiency can be maintained at high levels under different misalignment conditions.
A stacked-coil technology is demonstrated that realizes size-adjustable coil systems to compensate the notorious problem of lateral misalignment in nonradiative wireless power transfer (WPT) systems. The proposed system has a simple structure that consists of multiple layers of coils with various sizes. Depending on the misalignment, the coil pair that provides the best transfer efficiency is switched on. Thus, not only the transfer null is removed, but also a very high transfer efficiency is maintained even with extreme misalignment. Experimental results at 6.78 MHz show the effectiveness of the stacked coil for both short- and mid-range wireless power transfer systems. The transfer efficiency maintains abovementioned 80% up to 87% and 65% lateral misalignment when the separation between Tx and Rx coils are 10% and 50%, respectively, relative to the largest dimension of the coil. The three-layer short-range system successfully removes the transfer null to maintain a minimum transfer efficiency of 39.7% up to 126% misalignment. The two-layer mid-range system maintains transfer efficiency abovementioned 50% up to 103% misalignment. Furthermore, the performance is virtually the same even in an asymmetric WPT system, i.e., when the technique is applied to only one of the two coils. A detailed design procedure is also provided.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据