Heating Modes Study of Non-Magnetic Products in Rotating Magnetic Field of Permanent Magnets

摘要

Nowadays metallurgical and machine-building industries for nonmagnetic metal workpieces heating use induction installations of longitudinal magnetic field with electrical efficiency of not more than 0.5. The reported induction heating installations with rotated permanent magnets give the electrical efficiency up to 0.75-0.85 in heating of aluminium workpieces of round and rectangular cross-section. But electromagnetic, electromechanical and thermal processes are poorly researched in such installations, and the design development, and moreover, construction and heating regime optimization of such installations require deep understanding of them. This paper is concerned with completed researches of electromechanical and energetic characteristics of induction heating system workpieces made from nonmagnetic metals with low specific electrical resistance (aluminium, copper, bronze) by cross magnetic field of rotated permanent magnets, and also the effect of magnetic field concentrators on the heating of non-cylindrical billets is shown. The research is done by numerical simulation in the program package ANSYS.