| Presentation | 2014-07-10 Magnetic Field Measurement Near Wireless Power Transfer Systems For Information Household Appliances Satoshi ISHIHARA, Teruo ONISHI, Akimasa HIRATA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Measurement method of magnetic field for exposure assessment less than 20 cm from a wireless power transfer systems for information household appliances is discussed by numerical simulation and measurement at 100 kHz and 6.78 MHz. Four types of magnetic sources, which are a simple 1-turn coil and three types of coils simulating actual wireless power transfer systems, are considered. A magnetic sensor prescribed in the International Electrotechnical Commission (IEC) 62233 is used. As a result, if placement angle of the magnetic sensor is changed, magnetic field strength detected by the sensor is affected. The maximum variation coefficient (CV) is 27%. The reason for this deviation is due to the localization of the magnetic field around the magnetic sources. The effect of coupling between the magnetic source and the sensor is less than -5%. Therefore, the placement angle of the magnetic sensor is an essential factor in the magnetic field measurement. An example of evaluation scheme for conservative exposure assessment is proposed, and it is confirmed that the maximum magnetic field can be detected using this scheme though measurement time can be reduced to 1/7. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Information Household Appliance / Wireless Power Transfer / Measurement Method / Near Field Magnetic Field |
| Paper # | EMCJ2014-19 |
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| Conference Information | |
| Committee | EMCJ |
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| Conference Date | 2014/7/3(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Electromagnetic Compatibility (EMCJ) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Magnetic Field Measurement Near Wireless Power Transfer Systems For Information Household Appliances |
| Sub Title (in English) | |
| Keyword(1) | Information Household Appliance |
| Keyword(2) | Wireless Power Transfer |
| Keyword(3) | Measurement Method |
| Keyword(4) | Near Field Magnetic Field |
| 1st Author's Name | Satoshi ISHIHARA |
| 1st Author's Affiliation | NTT DOCOMO, INC.() |
| 2nd Author's Name | Teruo ONISHI |
| 2nd Author's Affiliation | NTT DOCOMO, INC. |
| 3rd Author's Name | Akimasa HIRATA |
| 3rd Author's Affiliation | Nagoya Institute of Technology |
| Date | 2014-07-10 |
| Paper # | EMCJ2014-19 |
| Volume (vol) | vol.114 |
| Number (no) | 129 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |