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Frequency-dependent resistance in Litz-wire planar windings for domestic induction heating appliances

Authors :
Acero, Jesus
Alonso, Rafael
Burdio, Jose M.
Barragan, Luis A.
Puyal, Diego
Source :
IEEE Transactions on Power Electronics. July, 2006, Vol. 21 Issue 4, p856, 11 p.
Publication Year :
2006

Abstract

In this paper, the frequency-dependent resistance in Litz-wire planar windings for domestic induction heating appliances is analyzed. For these inductors, in which the size is not an essential constraint, an analytical model is developed based on the superposition of different loss effects in the wire. Eddy current losses, including conduction losses and proximity-effect losses, both internal and external, were considered and modeled. The magnetic field necessary to evaluate the external proximity losses is as well analytically calculated considering the complete winding and load properties. To verify this model and its limitations, several inductors with different wires and numbers of turns were constructed and results with both non-loaded and loaded inductors are compared with theoretical predictions. Index Terms--Frequency-dependent resistance, home appliances, induction heating, Litz wire, resistance measurements.

Details

Language :
English
ISSN :
08858993
Volume :
21
Issue :
4
Database :
Gale General OneFile
Journal :
IEEE Transactions on Power Electronics
Publication Type :
Academic Journal
Accession number :
edsgcl.148766458