Derivation of Coupling Factors for Different Wireless Power Transfer Systems: Inter-and Intralaboratory Comparison

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Derivation of Coupling Factors for Different Wireless Power Transfer Systems : Inter-and Intralaboratory Comparison. / Wake, Kanako; Laakso, Ilkka; Hirata, Akimasa; Chakarothai, Jerdvisanop; Onishi, Teruo; Watanabe, Soichi; De Santis, Valerio; Feliziani, Mauro; Taki, Masao.

In: IEEE Transactions on Electromagnetic Compatibility, Vol. 59, No. 2, 7801935, 01.04.2017, p. 677-685.

Research output: Contribution to journalArticleScientificpeer-review

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Wake, K, Laakso, I, Hirata, A, Chakarothai, J, Onishi, T, Watanabe, S, De Santis, V, Feliziani, M & Taki, M 2017, 'Derivation of Coupling Factors for Different Wireless Power Transfer Systems: Inter-and Intralaboratory Comparison' IEEE Transactions on Electromagnetic Compatibility, vol. 59, no. 2, 7801935, pp. 677-685. https://doi.org/10.1109/TEMC.2016.2636328

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Wake, Kanako ; Laakso, Ilkka ; Hirata, Akimasa ; Chakarothai, Jerdvisanop ; Onishi, Teruo ; Watanabe, Soichi ; De Santis, Valerio ; Feliziani, Mauro ; Taki, Masao. / Derivation of Coupling Factors for Different Wireless Power Transfer Systems : Inter-and Intralaboratory Comparison. In: IEEE Transactions on Electromagnetic Compatibility. 2017 ; Vol. 59, No. 2. pp. 677-685.

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@article{3df8985213fb4ec3a1240cd780d9cf44,
title = "Derivation of Coupling Factors for Different Wireless Power Transfer Systems: Inter-and Intralaboratory Comparison",
abstract = "In this study, the inter-and intralaboratory comparison of coupling factors is discussed for human exposure to nonuniform magnetic field from different wireless power transfer (WPT) systems. In order to derive the coupling factors, different laboratories computed the internal electric field and specific absorption rate (SAR) for different WPT configurations. The concept of coupling factors was originally introduced in the International Electrotechnical Commission (IEC) 62311 and 62233 standards, for product safety assessment. For WPT systems, extension of the coupling factors is discussed in the IEC working group. This factor enables the estimation of the internal electric field and the SAR without detailed computation using human anatomical models. The coupling factors were computed for different WPT systems, such as an electric vehicle charging at approximately 100 kHz, induction coupling systems (140 kHz band), and home appliances (6.78 MHz). Four in-house codes were used in this inter-and intralaboratory comparison study to compute the coupling factors for the systems. Similar tendencies were observed in the coupling factors obtained by the groups. The difference between the coupling factors of different research groups is 30{\%} when considering the same exposure scenarios. The coupling factors for different WPT systems are different because of the frequency, coil size, and existence of the magnetic sheet (shield). The variability of the internal electric field for WPT systems is also investigated to set the coupling factor required for practical use.",
keywords = "Biological effects of electromagnetic fields, compliance assessment, dosimetry, international standards, wireless power transfer (WPT)",
author = "Kanako Wake and Ilkka Laakso and Akimasa Hirata and Jerdvisanop Chakarothai and Teruo Onishi and Soichi Watanabe and {De Santis}, Valerio and Mauro Feliziani and Masao Taki",
year = "2017",
month = "4",
day = "1",
doi = "10.1109/TEMC.2016.2636328",
language = "English",
volume = "59",
pages = "677--685",
journal = "IEEE Transactions on Electromagnetic Compatibility",
issn = "0018-9375",
publisher = "Institute of Electrical and Electronics Engineers",
number = "2",

}

RIS - Download

TY - JOUR

T1 - Derivation of Coupling Factors for Different Wireless Power Transfer Systems

T2 - Inter-and Intralaboratory Comparison

AU - Wake, Kanako

AU - Laakso, Ilkka

AU - Hirata, Akimasa

AU - Chakarothai, Jerdvisanop

AU - Onishi, Teruo

AU - Watanabe, Soichi

AU - De Santis, Valerio

AU - Feliziani, Mauro

AU - Taki, Masao

PY - 2017/4/1

Y1 - 2017/4/1

N2 - In this study, the inter-and intralaboratory comparison of coupling factors is discussed for human exposure to nonuniform magnetic field from different wireless power transfer (WPT) systems. In order to derive the coupling factors, different laboratories computed the internal electric field and specific absorption rate (SAR) for different WPT configurations. The concept of coupling factors was originally introduced in the International Electrotechnical Commission (IEC) 62311 and 62233 standards, for product safety assessment. For WPT systems, extension of the coupling factors is discussed in the IEC working group. This factor enables the estimation of the internal electric field and the SAR without detailed computation using human anatomical models. The coupling factors were computed for different WPT systems, such as an electric vehicle charging at approximately 100 kHz, induction coupling systems (140 kHz band), and home appliances (6.78 MHz). Four in-house codes were used in this inter-and intralaboratory comparison study to compute the coupling factors for the systems. Similar tendencies were observed in the coupling factors obtained by the groups. The difference between the coupling factors of different research groups is 30% when considering the same exposure scenarios. The coupling factors for different WPT systems are different because of the frequency, coil size, and existence of the magnetic sheet (shield). The variability of the internal electric field for WPT systems is also investigated to set the coupling factor required for practical use.

AB - In this study, the inter-and intralaboratory comparison of coupling factors is discussed for human exposure to nonuniform magnetic field from different wireless power transfer (WPT) systems. In order to derive the coupling factors, different laboratories computed the internal electric field and specific absorption rate (SAR) for different WPT configurations. The concept of coupling factors was originally introduced in the International Electrotechnical Commission (IEC) 62311 and 62233 standards, for product safety assessment. For WPT systems, extension of the coupling factors is discussed in the IEC working group. This factor enables the estimation of the internal electric field and the SAR without detailed computation using human anatomical models. The coupling factors were computed for different WPT systems, such as an electric vehicle charging at approximately 100 kHz, induction coupling systems (140 kHz band), and home appliances (6.78 MHz). Four in-house codes were used in this inter-and intralaboratory comparison study to compute the coupling factors for the systems. Similar tendencies were observed in the coupling factors obtained by the groups. The difference between the coupling factors of different research groups is 30% when considering the same exposure scenarios. The coupling factors for different WPT systems are different because of the frequency, coil size, and existence of the magnetic sheet (shield). The variability of the internal electric field for WPT systems is also investigated to set the coupling factor required for practical use.

KW - Biological effects of electromagnetic fields

KW - compliance assessment

KW - dosimetry

KW - international standards

KW - wireless power transfer (WPT)

UR - http://www.scopus.com/inward/record.url?scp=85008470414&partnerID=8YFLogxK

U2 - 10.1109/TEMC.2016.2636328

DO - 10.1109/TEMC.2016.2636328

M3 - Article

VL - 59

SP - 677

EP - 685

JO - IEEE Transactions on Electromagnetic Compatibility

JF - IEEE Transactions on Electromagnetic Compatibility

SN - 0018-9375

IS - 2

M1 - 7801935

ER -

ID: 11503518