Efficiency Improvement in Dynamic Wireless Power Transfer by Placing a Magnetic Sheet Under the Power Transmitting Coil
Electric vehicles have a short driving range and require long charging times. Wireless power transfer (WPT) during vehicle moving can extend the driving range of such vehicles. In WPT for stationary vehicles, ferrite cores are used in the back yoke to improve power transfer efficiency. However, issu...
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| Format: | Article |
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IEEE
2025-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/10857318/ |
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| author | Yu Katagiri Yinggang Bu Tsutomu Mizuno Mitsuhide Sato |
| author_facet | Yu Katagiri Yinggang Bu Tsutomu Mizuno Mitsuhide Sato |
| author_sort | Yu Katagiri |
| collection | DOAJ |
| description | Electric vehicles have a short driving range and require long charging times. Wireless power transfer (WPT) during vehicle moving can extend the driving range of such vehicles. In WPT for stationary vehicles, ferrite cores are used in the back yoke to improve power transfer efficiency. However, issues associated with the high cost, durability, and excessive weight can emerge when installing ferrite coils on roads. As a result, ferrite is not used in the back yoke of the transmitting side during WPT for moving vehicles. In this study, we propose a lightweight and flexible magnetic sheet made of a magnetic composite material. This sheet can be placed under the transmitting coil. In this way, the coil Q factor and coupling coefficient can be improved. In this study, we report the improvement in transmission efficiency when the receiving coil moves and consequently, the improvement in the overall transfer efficiency of the power supply section. |
| format | Article |
| id | doaj-art-dea125ef89f04b0e8eb02ef91d52d4f8 |
| institution | Kabale University |
| issn | 2169-3536 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-dea125ef89f04b0e8eb02ef91d52d4f82025-02-07T00:01:29ZengIEEEIEEE Access2169-35362025-01-0113229562296310.1109/ACCESS.2025.353602910857318Efficiency Improvement in Dynamic Wireless Power Transfer by Placing a Magnetic Sheet Under the Power Transmitting CoilYu Katagiri0Yinggang Bu1Tsutomu Mizuno2Mitsuhide Sato3https://orcid.org/0000-0001-8836-1385Faculty of Engineering, Shinshu University, Nagano, JapanSpiral Tech Company Ltd., Nagano, JapanFaculty of Engineering, Shinshu University, Nagano, JapanFaculty of Engineering, Shinshu University, Nagano, JapanElectric vehicles have a short driving range and require long charging times. Wireless power transfer (WPT) during vehicle moving can extend the driving range of such vehicles. In WPT for stationary vehicles, ferrite cores are used in the back yoke to improve power transfer efficiency. However, issues associated with the high cost, durability, and excessive weight can emerge when installing ferrite coils on roads. As a result, ferrite is not used in the back yoke of the transmitting side during WPT for moving vehicles. In this study, we propose a lightweight and flexible magnetic sheet made of a magnetic composite material. This sheet can be placed under the transmitting coil. In this way, the coil Q factor and coupling coefficient can be improved. In this study, we report the improvement in transmission efficiency when the receiving coil moves and consequently, the improvement in the overall transfer efficiency of the power supply section.https://ieeexplore.ieee.org/document/10857318/Coupling coefficientelectric vehiclesmagnetic composite materialsmagnetic sheettransmission efficiencywireless power transfer |
| spellingShingle | Yu Katagiri Yinggang Bu Tsutomu Mizuno Mitsuhide Sato Efficiency Improvement in Dynamic Wireless Power Transfer by Placing a Magnetic Sheet Under the Power Transmitting Coil IEEE Access Coupling coefficient electric vehicles magnetic composite materials magnetic sheet transmission efficiency wireless power transfer |
| title | Efficiency Improvement in Dynamic Wireless Power Transfer by Placing a Magnetic Sheet Under the Power Transmitting Coil |
| title_full | Efficiency Improvement in Dynamic Wireless Power Transfer by Placing a Magnetic Sheet Under the Power Transmitting Coil |
| title_fullStr | Efficiency Improvement in Dynamic Wireless Power Transfer by Placing a Magnetic Sheet Under the Power Transmitting Coil |
| title_full_unstemmed | Efficiency Improvement in Dynamic Wireless Power Transfer by Placing a Magnetic Sheet Under the Power Transmitting Coil |
| title_short | Efficiency Improvement in Dynamic Wireless Power Transfer by Placing a Magnetic Sheet Under the Power Transmitting Coil |
| title_sort | efficiency improvement in dynamic wireless power transfer by placing a magnetic sheet under the power transmitting coil |
| topic | Coupling coefficient electric vehicles magnetic composite materials magnetic sheet transmission efficiency wireless power transfer |
| url | https://ieeexplore.ieee.org/document/10857318/ |
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