From Fem Analysis to Back EMF in Rotating Machines: Algorithms for Accurate Evaluation

  • Beatrice Mellara
  • Ezio Santini


An algorithm for the accurate evaluation of back emf at the terminals of a rotating machine is described the starting point is the vector potential as obtained via FEM analysis. Influence of local error on the numerical solution is discussed, and strategies to minimise the influence of the local error on the integral parameters are shown. An algorithm for the polynomial approximation of back emf vs. time is proposed, and numerical examples allow to evaluate the accuracy and robustness of the methodology.


Local Error Spline Approximation Polynomial Spline Flux Linkage Numerical Derivation 
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  1. [1]
    D.A. Lowther and P. P. Silvester. Computer Aided Design in Magnetics. Springer-Verlag 1985.Google Scholar
  2. [2]
    F.Caricchi, F. Crescimbini, O. Honorati and E. Santini. Optimum CAD-CAE Design of Axial-Flux PM Motors. Proceedings of the International Conference on Electrical Machines, Manchester (U.K.), 15–17 September 1992. Google Scholar
  3. [3]
    E. Santini and M. Vinci. Fast and Efficient Techniques for Interpolation of B-H Curves (invited paper). Electrosoft 1993, Southampton (U.K.), 4–6 July 1993. Edited on Software Applications in Electrical Engineering, Computational Mechanics Publications, pp. 263–270.Google Scholar
  4. [4]
    A. Di Napoli, P. Pinkas, E. Santini - CAD of IPMs - ISTET 93: 7th International Symposium on Theoretical Electrical Enginering, Szczecin (Poland), 13–15 September 1993.Google Scholar

Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • Beatrice Mellara
    • 1
  • Ezio Santini
    • 1
  1. 1.Dipartimento di Ingegneria ElettricaUniversita’ di Roma “La Sapienza”RomeItaly

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