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Mathematical Problems in Engineering
Volume 2014 (2014), Article ID 923745, 7 pages
http://dx.doi.org/10.1155/2014/923745
Research Article

Mathematical Modeling of Eddy-Current Loss for a New Induction Heating Device

School of Information Science and Engineering, Harbin Institute of Technology, 2 West Wenhua Road, Weihai 264209, China

Received 23 January 2014; Accepted 28 March 2014; Published 1 June 2014

Academic Editor: Zhijun Zhang

Copyright © 2014 Hai Du et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A new induction heating device is presented in this paper. This device can convert mechanical energy into heat energy by utilizing eddy currents, which are induced by rotating permanent magnets. A mathematical model is established for estimating eddy-current loss of the device. The distribution of induced currents and the resultant magnetic field intensity are considered in the process of modeling the eddy-current loss and so is the mutual influence of the electric field between neighborhood pole projection areas. Particularly, the skin effect is considered by correcting the numerical integral domain of eddy current density, which has great effect on the calculating results. Based on specific examples, the effectiveness and correctness of proposed model are proved by finite element analysis. The results show that the mathematical model can provide important reference for design and structure optimization of the device.