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Application of automatic choice of step size for time stepping finite element method to induction motors

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3 Author(s)
Ho, S.L. ; Dept. of Electr. Eng., Hong Kong Polytech. Univ., Hong Kong ; Fu, W.N. ; Wong, H.C.

Although the time stepping finite element method (FEM) is a powerful tool to simulate the operation of electrical machines, it has not been applied to practical problems widely because it requires a large amount of CPU time. This paper proposes to control the time step size automatically within the program to save computing time substantially. It is shown that only simple formulae for estimating the local truncation errors at each timestep using backward Euler's method or Crank-Nicolson's method are all that are required to be derived. These formulae require no extra complicated computation. Hence the reported algorithm can be extended easily to many finite element investigations to more FEM a practical tool to industrial problems. The strategy in choosing the optimal step size is described. The proposed algorithm is then used to study the transient behaviour of an induction motor

Published in:

Magnetics, IEEE Transactions on  (Volume:33 ,  Issue: 2 )

Date of Publication:

Mar 1997

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