| Presentation | 2011-12-09 A study on the correlation between common mode voltage measured by using CDNE and radiated electromagnetic field strength emitted from LED bulbs Shin KANNO, Norihito HIRASAWA, Yoshiharu AKIYAMA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | With increase the market introduction of the lighting emitted devices (LEDs) due to the advantages of saving electricity and development of costs reduction, electromagnetic disturbances to TV and radio services have been recognized. This is the result that the suppression of the electromagnetic disturbances emitted from the LED bulbs may not be considered because they are out of scope of EMC regulation. In particular, evaluation methods of the disturbances emitted from LED bulbs in frequency range 30 to 300 MHz are important at the view point of preventing from disturbance of radio reception. The method of conducted disturbances measurement by means of CDNE (Coupling and Decoupling Network for Emission) has been discussed in CISPR as an alternative method for radiated disturbance measurement. But correlation between two methods are not investigated. Therefore, we compared measurement results on four kinds of LED bulbs obtained by CDNE and conventional method. As the result, it is found that the correlation coefficients were 0.22 to 0.60. Additionally, we investigated one of major factor affects to the correlation that is the difference of impedance of EUT's mains terminal. Radiated disturbances were measured on condition that the CDNE was connected to the mains cable of the EUT. The correlation coefficients were slightly increased but we found that the difference of mains impedance was not major factor on the correlation between two measurement methods. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | LED bulbs / Conducted disturbances / Radiated disturbances / Coupling and Decoupling Network for emission |
| Paper # | EMCJ2011-98 |
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| Conference Information | |
| Committee | EMCJ |
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| Conference Date | 2011/12/2(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) | A study on the correlation between common mode voltage measured by using CDNE and radiated electromagnetic field strength emitted from LED bulbs |
| Sub Title (in English) | |
| Keyword(1) | LED bulbs |
| Keyword(2) | Conducted disturbances |
| Keyword(3) | Radiated disturbances |
| Keyword(4) | Coupling and Decoupling Network for emission |
| 1st Author's Name | Shin KANNO |
| 1st Author's Affiliation | NTT Energy and Environment systems lab.() |
| 2nd Author's Name | Norihito HIRASAWA |
| 2nd Author's Affiliation | NTT Energy and Environment systems lab. |
| 3rd Author's Name | Yoshiharu AKIYAMA |
| 3rd Author's Affiliation | NTT Energy and Environment systems lab. |
| Date | 2011-12-09 |
| Paper # | EMCJ2011-98 |
| Volume (vol) | vol.111 |
| Number (no) | 335 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |