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.
| Original language | English |
|---|---|
| Pages (from-to) | 350-357 |
| Number of pages | 8 |
| Journal | IEEJ Transactions on Industry Applications |
| Volume | 137 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2017 Jan 1 |
| Externally published | Yes |
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Keywords
- Contactless power transfer (CPT)
- High power
- Loss
- Proximity effect
- Skin effect
- Temperature
ASJC Scopus subject areas
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering
Cite this
Analysis of loss and temperature characteristics of high power contactless transformer due to high-frequency magnetic field fluctuations. / Shimotsu, Takuya; Kondo, Keiichiro; Ukita, Keigo.
In: IEEJ Transactions on Industry Applications, Vol. 137, No. 4, 01.01.2017, p. 350-357.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Analysis of loss and temperature characteristics of high power contactless transformer due to high-frequency magnetic field fluctuations
AU - Shimotsu, Takuya
AU - Kondo, Keiichiro
AU - Ukita, Keigo
PY - 2017/1/1
Y1 - 2017/1/1
N2 - 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.
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
UR - http://www.scopus.com/inward/record.url?scp=85017023403&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85017023403&partnerID=8YFLogxK
U2 - 10.1541/ieejias.137.350
DO - 10.1541/ieejias.137.350
M3 - Article
AN - SCOPUS:85017023403
VL - 137
SP - 350
EP - 357
JO - IEEJ Transactions on Industry Applications
JF - IEEJ Transactions on Industry Applications
SN - 0913-6339
IS - 4
ER -