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Master's Dissertation
DOI
https://doi.org/10.11606/D.3.1990.tde-07042022-113418
Document
Author
Full name
Silvio Ikuyo Nabeta
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 1990
Supervisor
Committee
Cardoso, Jose Roberto (President)
Martucci Junior, Moacyr
Qualifik, Paul
Title in Portuguese
Solução de problemas magnetostáticos por Elementos Finitos utilizando o ICCG.
Keywords in Portuguese
ICCG
Magnetostática
Método dos Elementos Finitos
Abstract in Portuguese
O objetivo deste trabalho e apresentar formalmente o Método dos Gradientes Conjugados com Pré-Condicionamento por Fatorização Incompleta de Cholesky (ICCG) para resolução de grandes sistemas, e aplicá-lo a um estudo magnetostático, desenvolvido pelo Método dos Elementos Finitos, de um motor síncrono de relutância. Esta apresentação consta ainda de uma comparação de desempenho do referido método com outros dois; o Método dos Gradientes Conjugados com Pré-Condicionamento por Sobre-relaxação Simétrica Sucessiva (SSOR-CG) e o Método de Decomposição de Cholesky, tanto a nível de resultados como a nível de tempo de processamento. Foram calculados os auto-valores da matriz jacobiana para a análise da influência destes nos tempos de processamento dos três métodos utilizados. As etapas de pré e pós processamentos foram realizadas através de programas já desenvolvidos pelo grupo de Elementos Finitos do Laboratório de Sistemas de Potência da Escola Politécnica da USP.
Title in English
Finit elements solution of magnetostatics problems by using the ICCG.
Keywords in English
Finit Elemets Method
ICCG
Magnetostatic
Abstract in English
The aim of this work is to present formally the Incomplete Cholesky Conjungate Gradient Method (ICCG) used for solve large systems and its application in a magnetostatic study, which was developed by the Finite Element Method (FEM), of a synchronous reluctance motor. This presentation also includes the comparison between the ICCG method and others two: the Symmetric Sucessive Over relaxation Method (SSOR) and the Cholesky Method, pointing out their results and the processing time. The eigenvalues of the jacobian matrix have been calculated in order to analyse their influence on the processing times of the three methods employed. The pre and the post-processor stages were made using programs developed by the Finite Elements group in the Laboratory of Power Systems from Escola Politécnica da USP.
 
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Publishing Date
2022-04-07
 
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