ELECTRIC, MAGNETIC AND THERMAL CONDITIONS INSIDE AN INDUCTION HEATED WORK-PIECE

Abstract

In the following pages an effort has been made to present a comprehensive picture of the effect of Induction heating. The analysis has been made considering cylindrical and rectangular section for the work-piece. The approach is made through a familiarity with what happens electrically and magnetically inside a work-piece being heated. Both the electrical and thermal aspects ofthe problem have been analysed thoroughly. The mathematical expressions have been derived for the penetration of magnetic field, distribution of eddy currents, generated heat and the distribution of temperature,-in the two types of work--pieces starting from the fundamental electromagnetic and heat flow theory. The solution of heat flow differential equation in the case of rectangular work-piece has been effected by showing a •di eqt analogy between the heat-flow problem and a particular transmission-line problem. Further an attempt has been made to give a brief review of the development of the subject in the past