TITLE:
Decoupling of Currents in Travelling Wave Induction Heating
AUTHORS:
Kenneth Frogner, Tord Cedell, Mats Andersson
KEYWORDS:
Induction Heating, Inductive Coupling, Decoupling, Travelling Wave, Uniform Heating
JOURNAL NAME:
Journal of Electromagnetic Analysis and Applications,
Vol.6 No.7,
June
27,
2014
ABSTRACT:
Travelling
wave induction heating (TWIH) suffers from severe interference between the
coils, which significantly reduces its efficiency. A strategy for decoupling
the currents in TWIH is presented, based on the anti-series or anti-parallel
connection of several inductors. The study investigates the coupling effect in
terms of amplitude and phase shift as functions of current and frequency,
respectively, including resonance behavior. In addition, the effects of
deviations of the inductor properties are analyzed. Measurements indicate that
the strategy produces very good results, almost eliminating the coupling
effect, increasing the efficiency, and simplifying control. Simulated and
measured results of the heating pattern are compared and efficiency values and
power densities are presented.