Solution of a 3-D complex finite element model of skewed rotor induction motors using an iterative method

One of the difficulties of the three-dimensional (3-D) eddy current finite element methods is to solve large finite element equations economically. In this paper, a 3-D eddy-current finite element model using a four component formulation of complex variables to study skewed rotor induction motors is described. An iterative process among the four specific components during the solution of large algebraic equations is presented. The proposed method overcomes the nonconvergence problems when the ICCG method or the shifting ICCG method is used directly. The algorithm also requires much less computer storage compared with the Gaussian elimination method.

[1]  Albert Foggia,et al.  A 3-D finite-element computation of eddy currents and losses in laminated iron cores allowing for electric and magnetic anisotropy , 1995 .

[2]  Weinong Fu,et al.  Direct modeling of the starting process of skewed rotor induction motors using a multi-slice technique , 1997 .

[3]  Weinong Fu,et al.  REVIEW AND FUTURE APPLICATION OF FINITE ELEMENT METHODS IN INDUCTION MOTORS , 1998 .

[4]  Antero Arkkio,et al.  Analysis of induction motors based on the numerical solution of the magnetic field and circuit equations , 1987 .

[5]  S. J. Salon,et al.  Three dimensional eddy currents using a four component finite element formulation , 1984 .

[6]  D. W. Burow,et al.  Finite element analysis of induction machines in the frequency domain , 1993 .

[7]  Weinong Fu,et al.  An incremental method for studying the steady state performance of induction motors using time stepping finite element model , 1997 .

[8]  D. Rodger,et al.  External circuit, movement, and periodicity considerations in the design of electrical machines using finite elements , 1995 .

[9]  S. Williamson.  Induction motor modelling using finite elements , 1994 .

[10]  K. Fujiwara,et al.  Acceleration of Convergence Characteristic of Iccg Method , 1992, Digest of the Fifth Biennial IEEE Conference on Electromagnetic Field Computation.

[11]  W. N. Fu,et al.  Computation of harmonic stray losses of induction motors using adaptive time stepping finite element method together with externally coupled circuits , 1995 .

[12]  Sotoshi Yamada,et al.  Four component three dimensional FEM analysis of flux concentration apparatus with four plates , 1988 .

[13]  S. L. Ho,et al.  Estimation of stray losses of skewed rotor induction motors using coupled 2-D and 3-D time stepping finite element methods , 1998 .