| Presentation | 2021-04-16 Improvement of wireless power transmission efficiency by inserting relay coil with optimized load impedance Tamami Maruyama, Tai Kimura, Masashi Nakatsugawa, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In previous work, we investigated on the improvement of wireless power transmission efficiency by inserting a non-feeding relay coil for magnetic field coupling wireless power transmission. By appropriately inserting the relay coil between the transmitting and the power receiving coils, the power transmission efficiency η could be increased. The maximum power transmission efficiency η_max is also obtained by optimizing the matching circuit connected to the power transmission and the power reception units. However, the matching circuit changes the electrical characteristics of the power receiving coil and the power transmitting coil, which may affect the improvement of inserting the relay coil. In this work, we proposed to adopt load impedance Z_L connected in series with all coils’ port. This reduced the discrepancy between transmission efficiencyη and maximum transmission efficiency η_max. It was also revealed that the insertion of the relay coil was effective to improve η_max as well as η by setting all coils’ characteristics the same. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Wireless Power Transmission efficiency / WPT / Wireless Power Transmission / kQ product / Magnetic Coupling |
| Paper # | WPT2021-4,MW2021-4 |
| Date of Issue | 2021-04-09 (WPT, MW) |
| Conference Information | |
| Committee | WPT / MW |
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| Conference Date | 2021/4/16(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Wireless Power Transfer, Microwave |
| Chair | Toshio Ishizaki(Ryukoku Univ.) / Yoshinori Kogami(Utsunomiya Univ.) |
| Vice Chair | / Tadashi Kawai(Univ. of Hyogo) / Kensuke Okubo(Okayama Prefectural Univ.) / Shintaro Shinjo(Mitsubishi Electric) |
| Secretary | (Nagasaki Univ.) / Tadashi Kawai(Okayama Univ.) / Kensuke Okubo(Fujitsu Labs.) / Shintaro Shinjo(Saitama Univ.) |
| Assistant | Osamu Kagaya(AGC) / Yoshiaki Narusue(Univ. of Tokyo) / Kyoya Takano(Tokyo Univ. of Science) / Naoki Hasegawa(Softbank) |
| Paper Information | |
| Registration To | Technical Committee on Wireless Power Transfer / Technical Committee on Microwaves |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Improvement of wireless power transmission efficiency by inserting relay coil with optimized load impedance |
| Sub Title (in English) | |
| Keyword(1) | Wireless Power Transmission efficiency |
| Keyword(2) | WPT |
| Keyword(3) | Wireless Power Transmission |
| Keyword(4) | kQ product |
| Keyword(5) | Magnetic Coupling |
| 1st Author's Name | Tamami Maruyama |
| 1st Author's Affiliation | National Institute of Technology, Hakodate College(NIT, Hakodate College) |
| 2nd Author's Name | Tai Kimura |
| 2nd Author's Affiliation | National Institute of Technology, Hakodate College(NIT, Hakodate College) |
| 3rd Author's Name | Masashi Nakatsugawa |
| 3rd Author's Affiliation | National Institute of Technology, Hakodate College(NIT, Hakodate College) |
| Date | 2021-04-16 |
| Paper # | WPT2021-4,MW2021-4 |
| Volume (vol) | vol.121 |
| Number (no) | WPT-3,MW-4 |
| Page | pp.pp.16-20(WPT), pp.16-20(MW), |
| #Pages | 5 |
| Date of Issue | 2021-04-09 (WPT, MW) |