| Presentation | 2015-04-17 Study of distance-insensitive electric field coupling resonant wireless power transfer Ryuichi Namba, Yohtaro Umeda, Yusuke Kozawa, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In recent years, resonant wireless power transmission technology for supplying electric power with high efficiency in electronic devices in cordless towards the realization of the ubiquitous society has been attracting attention. Resonant wireless power transmission has two types，one is magnetic field type and the other is electric field type. Although electric field type shows poor power efficiency compared to magnetic field type, they are advantageous in the robustness for positional deviation and electromagnetic interference. Recently, electric field type power transmission has been reported with comparable efficiency to a magnetic field type. However, capacitances generated between metal plates in the power transmission are not taken into account. In this study, we propose a resonance optimization circuit configuration including the mutual capacitances in electric field coupling resonant wireless power transmission. Conventional method and the proposed method are to be compared by circuit simulation using class-D power amplifier and equivalent circuit of the electric coupling. As a result, when using the ideal inductor, it is shown that received power is less sensitive to the transmission distance as compared to the conventional method. On the other hand, when using a real inductor, as losses due to the internal resistance of the inductor increases, the transmission distance dependence of the received power increases. To solve this problem we find that increasing the road resistance is reduces the distance dependence of the received power. In addition, we showed it is possible to extract the desired received power by optimizing the power supply voltage and load resistance. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Wireless power transfer / Electric field coupling / class-D power amplifier |
| Paper # | WPT2015-9,MW2015-9 |
| Date of Issue | 2015-04-09 (WPT, MW) |
| Conference Information | |
| Committee | WPT / MW |
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| Conference Date | 2015/4/16(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kikai-Shinko-Kaikan Bldg. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Microwave technologies for Wireless Power Transfer, Superconducting Microwave technologies, Microwave technologies, etc. |
| Chair | Naoki Shinohara(Kyoto Univ.) / Futoshi Kuroki(Kure National College of Tech.) |
| Vice Chair | / Masashi Nakatsugawa(NTT) / Takao Kuki(NHK-ES) / Koji Yamanaka(Mitsubishi Electric) |
| Secretary | (Sendai National College of Tech.) / Masashi Nakatsugawa(Kagoshima Univ.) / Takao Kuki(NEC) / Koji Yamanaka(NTT) |
| Assistant | Hiroshi Hirayama(Nagoya Inst. of Tech.) / Takashi Hikagae(Hokkaido Univ.) / Masataka Ohira(Saitama Univ.) / Ryo Ishikawa(Univ. of Electro-Comm.) |
| 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) | Study of distance-insensitive electric field coupling resonant wireless power transfer |
| Sub Title (in English) | |
| Keyword(1) | Wireless power transfer |
| Keyword(2) | Electric field coupling |
| Keyword(3) | class-D power amplifier |
| 1st Author's Name | Ryuichi Namba |
| 1st Author's Affiliation | Tokyo University of Science(Tokyo Univ. of Science) |
| 2nd Author's Name | Yohtaro Umeda |
| 2nd Author's Affiliation | Tokyo University of Science(Tokyo Univ. of Science) |
| 3rd Author's Name | Yusuke Kozawa |
| 3rd Author's Affiliation | Tokyo University of Science(Tokyo Univ. of Science) |
| Date | 2015-04-17 |
| Paper # | WPT2015-9,MW2015-9 |
| Volume (vol) | vol.115 |
| Number (no) | WPT-3,MW-4 |
| Page | pp.pp.45-50(WPT), pp.45-50(MW), |
| #Pages | 6 |
| Date of Issue | 2015-04-09 (WPT, MW) |