Study on the adjustment capability of the excitation system located inside superconducting machine electromagnetic shield

International Cryogenic Materials Conference 2017

Xia, D.^1 ; Xia, Z.^2

Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, China^1

Bellevue College, Bellevue

WA, United States^2

关键词: Excitation system;    Field change;    Moving parts;    Normal operations;    Superconducting machines;    Transient electromagnetic fields;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/279/1/012016/pdf
DOI  :  10.1088/1757-899X/279/1/012016

来源: IOP

【 摘 要 】

The ability for the excitation system to adjust quickly plays a very important role in maintaining the normal operation of superconducting machines and power systems. However, the eddy currents in the electromagnetic shield of superconducting machines hinder the exciting magnetic field change and weaken the adjustment capability of the excitation system. To analyze this problem, a finite element calculation model for the transient electromagnetic field with moving parts is established. The effects of three different electromagnetic shields on the exciting magnetic field are analyzed using finite element method. The results show that the electromagnetic shield hinders the field changes significantly, the better its conductivity, the greater the effect on the superconducting machine excitation.