From Fem Analysis to Back EMF in Rotating Machines: Algorithms for Accurate Evaluation
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.
KeywordsLocal Error Spline Approximation Polynomial Spline Flux Linkage Numerical Derivation
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