Transient field of non-reflecting resistively loaded dipole excited by ultrawide band signals

2002 ◽  
Author(s):  
A.K. Choudhury ◽  
S.N. Sammadar ◽  
E. Mokole
Keyword(s):  
Transient Field

Transient Field Distribution in a Transformer Affected by Variably Loaded Secondaries

PIERS Online ◽  
2009 ◽  
Vol 5 (1) ◽  
pp. 16-20
Author(s):  
Gerd Mrozynski ◽  
Eckhard Baum ◽  
Otto Erb
Keyword(s):  
Field Distribution ◽  
Transient Field

scholarly journals Preventing serialization vulnerabilities through transient field detection

2021 ◽  
Author(s):  
Pierre Graux ◽  
Jean-François Lalande ◽  
Valérie Viet Triem Tong ◽  
Pierre Wilke
Keyword(s):  
Transient Field ◽  
Field Detection

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.

Transient field measurements of g-factors in 194,196,198Pt; g(21+) systematics in transitional W, Os, Pt nuclei

1991 ◽  
Vol 528 (2) ◽  
pp. 447-464 ◽  
Author(s):  
A.E. Stuchbery ◽  
G.J. Lampard ◽  
H.H. Bolotin
Keyword(s):  
Field Measurements ◽  
Transient Field ◽  
G 21 ◽  
G Factors

Electromagnetic performance and thermal analysis of a novel permanent magnet fluxed-switching coupler

2021 ◽  
pp. 1-18
Author(s):  
Lezhi Ye ◽  
Yulong Zhang ◽  
Mingguang Cao
Keyword(s):  
Temperature Distribution ◽  
Permanent Magnet ◽  
Permanent Magnets ◽  
Three Dimensional ◽  
Load Condition ◽  
Maximum Load ◽  
Maximum Temperature ◽  
The Novel ◽  
Transient Field ◽  
Three Dimensional Finite Element

To solve the problem of complex operating device and permanent magnets (PMs) demagnetization at high temperature, a new type of permanent magnet fluxed-switching coupler (PMC) with synchronous rotating adjuster is proposed. Its torque can be adjusted by rotating a switched flux angle between the adjuster and PMs along the circumferential direction. The structural feature and working principle of the PMC are introduced. The analytical model of the novel PMC was established. The torque curves are calculated in transient field by using the three-dimensional finite element method (3-D FEM). The temperature distribution of the novel PMC under rated condition is calculated by 3-D FEM, and the temperature distribution of the PM is compared with that of the conventional PMC. The simulation and test results show that the maximum temperature of copper disc and PM of the novel PMC are 100 °C and 48 °C respectively. The novel PMC can work stably for a long time under the maximum load condition.

gfactor of the first excited state inFe56and implications for transient-field calibration in the Fe region

2009 ◽  
Vol 79 (2) ◽  
Author(s):  
M. C. East ◽  
A. E. Stuchbery ◽  
S. K. Chamoli ◽  
A. N. Wilson ◽  
H. L. Crawford ◽  
...  
Keyword(s):  
Excited State ◽  
Transient Field ◽  
Field Calibration ◽  
First Excited State
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