Uniformity condition for a rectangular field coil with a split winding

1978 ◽  
Vol 49 (1) ◽  
pp. 80-82 ◽  
Author(s):  
T. N. Casselman ◽  
R. B. Fryer ◽  
F. N. Simon
Keyword(s):  
Field Coil ◽  
Split Winding ◽  
Uniformity Condition ◽  
Rectangular Field

scholarly journals Analysis of Turn-to-Turn Fault on Split-Winding Transformer Using Coupled Field-Circuit Approach

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1314
Author(s):  
Cunxiang Yang ◽  
Yiwei Ding ◽  
Hongbo Qiu ◽  
Bin Xiong
Keyword(s):  
Low Voltage ◽  
Short Circuit ◽  
Three Dimensional ◽  
Great Influence ◽  
Normal Operation ◽  
Transient Field ◽  
Axial Forces ◽  
Leakage Field ◽  
Characteristics Analysis ◽  
Split Winding

The turn-to-turn faults (TTF) are also inevitable in split-winding transformers. The distorted leakage field generated by the TTF current results in large axial forces and end thrusts in the fault windings as well as affecting other branch windings normal operation, so it is of significance to study TTF of split-winding transformers. In this paper, the characteristics analysis of the split-winding transformer under the TTFs of the low voltage winding at different positions are presented. A 3600 KVA four split-windings transformer is taken as an example. Then, a simplified three-dimensional simplified model is established, taking into account the forces of the per-turn coil. The nonlinear-transient field-circuit coupled finite element method is used for the model. The leakage field distribution under the TTFs of the low voltage winding at different positions is studied. The resultant force of the short-circuit winding and the force of the per-turn coil are obtained. Subsequently, the force and current relationship between the branch windings are analyzed. The results show that the TTF at the specific location has a great influence on the axial windings on the same core, and the distorted leakage magnetic field will cause excessive axial force and end thrust of the normal and short-circuit windings. These results can provide a basis for the short-circuit design of split-winding transformer.

Seismic analysis of ITER fourth PF (Poloidal Field Coil) feeder

2014 ◽  
Vol 89 (9-10) ◽  
pp. 1923-1927 ◽  
Author(s):  
Sumei Liu ◽  
Wei Chen ◽  
Yuntao Song ◽  
Xiaojun Ni ◽  
Zhongwei Wang ◽  
...  
Keyword(s):  
Seismic Analysis ◽  
Poloidal Field ◽  
Field Coil

INTOR toroidal field coil design studies

1981 ◽  
Vol 17 (5) ◽  
pp. 1699-1702 ◽  
Author(s):  
J. Erb ◽  
U. Jeske ◽  
H. Zehlein
Keyword(s):  
Toroidal Field ◽  
Coil Design ◽  
Design Studies ◽  
Field Coil

An Improved Control System for a Split Winding Bearingless Induction Motor

2011 ◽  
Vol 58 (8) ◽  
pp. 3401-3408 ◽  
Author(s):  
Elkin Ferney Rodriguez ◽  
José Andrés Santisteban
Keyword(s):  
Control System ◽  
Induction Motor ◽  
Split Winding

Feasibility Study on Welding Structure of the HT-7U Toroidal Field Coil Case

2001 ◽  
Vol 3 (3) ◽  
pp. 821-826 ◽  
Author(s):  
Chen Wen-ge ◽  
Pan Yin-nian ◽  
Wu Jie-feng ◽  
Wei Jing ◽  
Wu Song-tao ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Toroidal Field ◽  
Field Coil

Untersuchung des Druckaufbaus einer stationären, magnetfeldstabilisierten Helium-Entladung mit Hilfe magnetischer Messungen

1967 ◽  
Vol 22 (10) ◽  
pp. 1599-1612 ◽  
Author(s):  
Otto Klüber
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Plasma Column ◽  
Ambipolar Diffusion ◽  
Nernst Effect ◽  
Thermomagnetic Effect ◽  
Field Coil ◽  
Neutral Gas ◽  
Ring Currents ◽  
The Magnetic Field

A stationary discharge is produced bya current flowing parallel to the magnetic field ofa cylindrical coil. In the region where the field is homogeneous the pressure in the plasma column is much higher than that in the surrounding neutral gas. This is mainly caused by diamagnetic ring currents, as is shown by measuring the magnetic flux due to these currents. Two effects are primarily responsible for the ring currents in this region: The already known effect of the ambipolar diffusion across the magnetic field anda thermomagnetic effect, called NERNST effect, whose influence on the pressure build-up ofa plasma has not been investigated hitherto. Other phenomena causing ring currents occur in the plasma near the coil ends and outside the field coil.

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