Analysis of loss and temperature characteristics of high power contactless transformer due to high-frequency magnetic field fluctuations

Takuya Shimotsu, Keiichiro Kondo, Keigo Ukita

研究成果: Article

抄録

In contactless power transformers, the electric power is transmitted at a high frequency. Therefore, the skin and proximity effects much increase the AC resistance. In this paper, the influence of the magnetic field and frequency on the equivalent resistance of the coils is evaluated. In addition, the iron loss characteristics are evaluated by considering the excitation voltage. The iron and copper losses due to the skin and proximity effects in a 300 kW CPT transformer were estimated. Based on the results, the temperature rise characteristics were predictively studied using heat equivalent circuits. The results of this study contribute to the thermal design efforts of high power contactless power transformer coils.

元の言語English
ページ(範囲)350-357
ページ数8
ジャーナルIEEJ Transactions on Industry Applications
137
発行部数4
DOI
出版物ステータスPublished - 2017 1 1
外部発表Yes

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Power transformers
Skin
Magnetic fields
Iron
Equivalent circuits
Copper
Temperature
Electric potential
Hot Temperature

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

これを引用

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abstract = "In contactless power transformers, the electric power is transmitted at a high frequency. Therefore, the skin and proximity effects much increase the AC resistance. In this paper, the influence of the magnetic field and frequency on the equivalent resistance of the coils is evaluated. In addition, the iron loss characteristics are evaluated by considering the excitation voltage. The iron and copper losses due to the skin and proximity effects in a 300 kW CPT transformer were estimated. Based on the results, the temperature rise characteristics were predictively studied using heat equivalent circuits. The results of this study contribute to the thermal design efforts of high power contactless power transformer coils.",
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AU - Shimotsu, Takuya

AU - Kondo, Keiichiro

AU - Ukita, Keigo

PY - 2017/1/1

Y1 - 2017/1/1

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AB - In contactless power transformers, the electric power is transmitted at a high frequency. Therefore, the skin and proximity effects much increase the AC resistance. In this paper, the influence of the magnetic field and frequency on the equivalent resistance of the coils is evaluated. In addition, the iron loss characteristics are evaluated by considering the excitation voltage. The iron and copper losses due to the skin and proximity effects in a 300 kW CPT transformer were estimated. Based on the results, the temperature rise characteristics were predictively studied using heat equivalent circuits. The results of this study contribute to the thermal design efforts of high power contactless power transformer coils.

KW - Contactless power transfer (CPT)

KW - High power

KW - Loss

KW - Proximity effect

KW - Skin effect

KW - Temperature

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