Title :
High-current vacuum arc appearance in nonhomogeneous axial magnetic field
Author :
Chaly, A.M. ; Logatchev, A.A. ; Zabello, K.K. ; Shkol´nik, S.M.
Author_Institution :
Tavrida Electr. Ltd., Moscow, Russia
Abstract :
The distribution of the spots over the cathode of high-current vacuum arc stabilized by axial magnetic field (AMF) has been investigated. AMF configuration has been varied from conventional "bell-shaped" to "magnetic barrier", where substantial AMF is created in the electrode edge virtually vanishing in the center. Complex effect of the AMF configuration on the behavior of cathode spots has been found. This behavior has been satisfactorily explained based on the Steenbeck principle. It has been shown that "magnetic barrier" represents optimum AMF configuration providing even current distribution and minimum arc voltage.
Keywords :
cathodes; magnetic fields; vacuum arcs; Steenbeck principle; cathode spots distribution; electrode edge; even current distribution; high-current vacuum arc; magnetic barrier configuration; minimum arc voltage; nonhomogeneous axial magnetic field; stabilized vacuum arc; Anodes; Cathodes; Circuit breakers; Current density; Current distribution; Current supplies; Electrodes; Magnetic fields; Vacuum arcs; Voltage;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum, 2002. 20th International Symposium on
Print_ISBN :
0-7803-7394-4
DOI :
10.1109/ISDEIV.2002.1027388
