Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/854
Title: An effective method to reduce the computing time of nonlinear time-stepping finite-element magnetic field computation
Authors: Fu, Weinong
Ho, Siu-lau
Li, H. L.
Wong, Ho-ching Chris
Subjects: Computation time
Finite element
ICCG method
Newton-Raphson method
Nonlinear
Time stepping
Issue Date: Mar-2002
Publisher: IEEE
Source: IEEE transactions on magnetics, Mar. 2002, v. 38, no. 2, p. 441-444.
Abstract: Time-stepping finite-element methods have been widely used to compute the magnetic field of electrical machines. Because the reluctivities of magnetic materials are nonlinear, the finite-element equations have to be solved iteratively. In this paper, an effective method for reducing the computing time of the Newton-Raphson method coupled with the incomplete Cholesky-conjugate gradient algorithm for solving time-stepping finite-element problems is presented. The proposed method is based on a proper prediction of some predefined error tolerances in the iteration processes at each time-stepping finite-element computation. The computational analysis on an induction motor shows that the proposed strategy can reduce the nominal computing time by as much as 50%.
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Type: Journal/Magazine Article
URI: http://hdl.handle.net/10397/854
DOI: 10.1109/20.996117
ISSN: 0018-9464
Appears in Collections:EE Journal/Magazine Articles
IC Journal/Magazine Articles

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