Dual-Band Free-Positioning Transmitting Coil for Multiple-Receiver Wireless Power Transfer
In recent years, the requirement for a compact wireless power transfer (WPT) system that can supply power to multiple devices in various practical usage scenarios has been attracted many researchers. The receiver (Rx) misalignment problem is contributory to the power transfer efficiency (PTE) degrad...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2021-01-01
|
| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9502736/ |
| _version_ | 1823934752246202368 |
|---|---|
| author | Hoang Le-Huu Chulhun Seo |
| author_facet | Hoang Le-Huu Chulhun Seo |
| author_sort | Hoang Le-Huu |
| collection | DOAJ |
| description | In recent years, the requirement for a compact wireless power transfer (WPT) system that can supply power to multiple devices in various practical usage scenarios has been attracted many researchers. The receiver (Rx) misalignment problem is contributory to the power transfer efficiency (PTE) degradation. Moreover, in a multiple-output WPT system, the overall system efficiency is also affected by cross-coupling between receivers. This paper proposes a dual-band free-positioning transmitting coil (FPDB-Tx) for multiple-receiver WPT. A three-dimensional Tx structure is modeled by investigating the current direction on each coil loop to adapt the Rx angular and axial misalignment. The Tx configuration is designed following a wireless charging box concept, where multiple Rx devices can receive energy freely without a null efficiency point. The mutual inductance is examined by a mathematical method in various Rx orientations to verify the free-positioning characteristic. Furthermore, an equivalent circuit model of the WPT system is theoretically analyzed to obtain dual operating frequency bands and then maximized the PTE. The experimental results show that the proposed WPT system achieves a stable PTE in various Rx positions. Especially, the WPT system has a maximum PTE of 97.27% and 91% at 6.78 MHz and 13.56MHz, respectively. |
| first_indexed | 2024-12-16T22:24:54Z |
| format | Article |
| id | doaj.art-c5512f0150e24fb5ba2b896234e9d529 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-16T22:24:54Z |
| publishDate | 2021-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-c5512f0150e24fb5ba2b896234e9d5292022-12-21T22:13:55ZengIEEEIEEE Access2169-35362021-01-01910729810730810.1109/ACCESS.2021.31016359502736Dual-Band Free-Positioning Transmitting Coil for Multiple-Receiver Wireless Power TransferHoang Le-Huu0https://orcid.org/0000-0002-2460-6491Chulhun Seo1https://orcid.org/0000-0002-6765-8734Department of Information and Communication Convergence, Soongsil University, Dongjak-gu, Seoul, South KoreaDepartment of Information and Communication Convergence, Soongsil University, Dongjak-gu, Seoul, South KoreaIn recent years, the requirement for a compact wireless power transfer (WPT) system that can supply power to multiple devices in various practical usage scenarios has been attracted many researchers. The receiver (Rx) misalignment problem is contributory to the power transfer efficiency (PTE) degradation. Moreover, in a multiple-output WPT system, the overall system efficiency is also affected by cross-coupling between receivers. This paper proposes a dual-band free-positioning transmitting coil (FPDB-Tx) for multiple-receiver WPT. A three-dimensional Tx structure is modeled by investigating the current direction on each coil loop to adapt the Rx angular and axial misalignment. The Tx configuration is designed following a wireless charging box concept, where multiple Rx devices can receive energy freely without a null efficiency point. The mutual inductance is examined by a mathematical method in various Rx orientations to verify the free-positioning characteristic. Furthermore, an equivalent circuit model of the WPT system is theoretically analyzed to obtain dual operating frequency bands and then maximized the PTE. The experimental results show that the proposed WPT system achieves a stable PTE in various Rx positions. Especially, the WPT system has a maximum PTE of 97.27% and 91% at 6.78 MHz and 13.56MHz, respectively.https://ieeexplore.ieee.org/document/9502736/Wireless power transferfree-positioning WPTmultiple-receiver WPTdual-band WPTmutual couplingimpedance matching network |
| spellingShingle | Hoang Le-Huu Chulhun Seo Dual-Band Free-Positioning Transmitting Coil for Multiple-Receiver Wireless Power Transfer IEEE Access Wireless power transfer free-positioning WPT multiple-receiver WPT dual-band WPT mutual coupling impedance matching network |
| title | Dual-Band Free-Positioning Transmitting Coil for Multiple-Receiver Wireless Power Transfer |
| title_full | Dual-Band Free-Positioning Transmitting Coil for Multiple-Receiver Wireless Power Transfer |
| title_fullStr | Dual-Band Free-Positioning Transmitting Coil for Multiple-Receiver Wireless Power Transfer |
| title_full_unstemmed | Dual-Band Free-Positioning Transmitting Coil for Multiple-Receiver Wireless Power Transfer |
| title_short | Dual-Band Free-Positioning Transmitting Coil for Multiple-Receiver Wireless Power Transfer |
| title_sort | dual band free positioning transmitting coil for multiple receiver wireless power transfer |
| topic | Wireless power transfer free-positioning WPT multiple-receiver WPT dual-band WPT mutual coupling impedance matching network |
| url | https://ieeexplore.ieee.org/document/9502736/ |
| work_keys_str_mv | AT hoanglehuu dualbandfreepositioningtransmittingcoilformultiplereceiverwirelesspowertransfer AT chulhunseo dualbandfreepositioningtransmittingcoilformultiplereceiverwirelesspowertransfer |