AC losses in a HTS coil carrying DC current in AC external magnetic field

2003 ◽  
Vol 392-396 ◽  
pp. 1145-1149 ◽  
Author(s):  
J. Ogawa ◽  
Y. Zushi ◽  
M. Fukushima ◽  
O. Tsukamoto ◽  
E. Suzuki ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Ac Losses ◽  
Dc Current

AC losses of Ag-(Bi,Pb)SrCaCuO-2223 tapes in combination of transverse external magnetic field and transport current

1995 ◽  
Vol 5 (2) ◽  
pp. 709-712 ◽  
Author(s):  
M. Ciszek ◽  
B.A. Glowacki ◽  
S.P. Ashworth ◽  
A.M. Campbell ◽  
J.E. Evetts
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Transport Current ◽  
Ac Losses

Influence of External Magnetic Field on AC Losses at EF Coil Joints of JT-60SA

2012 ◽  
Vol 22 (3) ◽  
pp. 4704604-4704604 ◽  
Author(s):  
T. Takao ◽  
K. Nakamura ◽  
T. Takagi ◽  
N. Tanoue ◽  
H. Murakami ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Ac Losses

scholarly journals Investigation of the Arc Characteristics of Switching DC Arcs on Hydrogen Containing Gas Mixtures

2019 ◽  
Vol 6 (1) ◽  
pp. 69-72 ◽  
Author(s):  
D. Gonzalez ◽  
S. Gortschakow ◽  
S. Yu ◽  
F. Werner
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
High Speed ◽  
Gas Mixtures ◽  
High Speed Imaging ◽  
Arc Characteristics ◽  
Pressure Discharge ◽  
Model Chamber ◽  
Imaging And Spectroscopy ◽  
Dc Current

<p>The characteristics of switching DC current arcs in  hydrogen  containing gas mixtures under pressure were investigated using a model chamber. The switching device consists of an electro-mechanic double breaker unit with copper contacts. High-speed imaging and spectroscopy were used to observe and to characterize the switching arc. The experiments indicate how the dynamic interaction of an external magnetic field with a high-pressure discharge causes an elongation and twisting of the arc-channel and consequently a voltage increase. Comparative measurements with and without external magnetic field indicate a strong influence of this factor. Cu and N lines together with strongly broadened H lines were observed.</p>

Numerical study on ac loss in superconducting bulk caused by various magnetic wave conditions

2017 ◽  
Vol 31 (25) ◽  
pp. 1745006
Author(s):  
Jing Li ◽  
Xiang Li ◽  
Junjie Tang ◽  
Tianyong Gong ◽  
Le Han
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Numerical Study ◽  
Ac Loss ◽  
Ac Losses ◽  
Magnetic Wave ◽  
Finite Element Software ◽  
Analytical Formulas ◽  
Traveling Magnetic Field ◽  
Wave Conditions

This paper presents an investigation on ac losses of superconducting bulk caused by various magnetic wave conditions with the help of finite element software of Comsol Multiphysics. Three different magnetic wave conditions are analyzed, which are standing magnetic field, rotated magnetic field and traveling magnetic field. The calculation ac loss result was compared with that from analytical formulas for type-II superconducting slab and cylinder. The influences of the strength of external magnetic field on the ac losses were investigated. Effects of a relatively stable trapped-field of superconducting bulk on ac losses in time-varying magnetic field are clarified. Effect of spatially inhomogeneous distribution of the external magnetic field on the ac loss is studied.

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