Title :
Analysis of Axial Magnetic Field Characteristics of Coil Type Axial Magnetic Field Vacuum Interrupters
Author :
Wang, Zhongyi ; Liu, Zhiyuan ; Zhang, Xuan ; Zheng, Yuesheng ; Wang, Jimei
Author_Institution :
Dept. of Electr. Eng., Xi´´an Jiaotong Univ.
Abstract :
Axial magnetic field (AMF) characteristics of coil type AMF vacuum interrupters are analyzed by 3D finite element method. Seven contact parameters are taken into account in this paper. Analysis results show that: (1) Axial magnetic flux density decreases with increase of contact diameter, coil height, and gap distance. Axial magnetic flux density is not sensitive to coil thickness. So is contact plate material. Axial magnetic flux density is strongly influenced by welding of stainless steel plates to contact plate and coil. (2) Phase shift time between AMF and source current decreases with decrease of contact diameter and increase of contact gap. And it also decreases when contact material is CuCr50. (3) Maximum current density in coils or contact plates decreases with increase of contact diameter, coil thickness. And it also decreases when contact material is CuCr25. So does conductor resistance
Keywords :
chromium alloys; copper alloys; electrical contacts; finite element analysis; magnetic field effects; magnetic flux; vacuum interrupters; 3D finite element method; AMF characteristics; AMF density; AMF-current phase shift time; CuCr; CuCr25; CuCr50; axial magnetic field; coil height; coil thickness; coil type AMF vacuum interrupters; conductor resistance; contact diameter; contact gap distance; contact parameters; contact plate material; maximum current density; stainless steel plates; welding; Coils; Conducting materials; Finite element methods; Interrupters; Magnetic analysis; Magnetic fields; Magnetic flux density; Magnetic materials; Steel; Welding;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum, 2006. ISDEIV '06. International Symposium on
Conference_Location :
Matsue
Print_ISBN :
1-4244-0191-7
Electronic_ISBN :
1093-2941
DOI :
10.1109/DEIV.2006.357302
