Andonov - Modelling Of ic Fields Generated By Cone-Shaped Coils For Welding With ic Mixing.pdf

Journal of the University of ChemicalI. Kostov, Technology A. Andonov and Metallurgy, 40, 3, 2005, 261-264
MODELLING OF IC FIELDS GENERATED BY CONE-SHAPED COILS
FOR WELDING WITH IC MIXING
I. Kostov1, A. Andonov2
1Technical University-Sofia Received 14 March 2005
2University of Chemical Technology and Metallurgy Accepted 20 June 2005
8 , 1756 Sofia, Bulgaria
E-mail: ******@
ABSTRACT
Modelling of ic fields (MF) of cone-shaped (truncated cone) is au object of interest. Models concerned with
a ic system including different numbers of coils and with/without a closing part of the ic yoke are discussed.
The results are presented graphically as maps of the ic field induction in both axial and radial directions.
Keywords: ic field, welding, ic mixing.
INTRODUCTION So, repulsive forces are generated, that is, a ic
levitation of the disc above the pole.
ic field application for ic levita- The same idea is attractive for creation of sys-
tion of molten metals is widely encountered in molding tems for ic levitation of molten metals [2]. For
of metals, among them titanium, molybdenum, vana- example, such a system consists of co-axial single layer
dium, etc. The high temperature range of the welding coils connected in series. The coils are energized by
process is associated with unwanted contacts with the low-frequency current supply. Usually, a