Parallel Time-Stepped Analysis of Induction Machines With Newton–Raphson Iteration and Domain Decomposition

This paper presents an approach for the efficient solution of multislice finite-element analysis of skewed induction machines incorporating an interbar current model. The Newton-Raphson method is applied to linearize the nonlinear field equations for each slice and domain decomposition is then utilized to reduce the field equations on to the circuit equations. Domain decomposition is implemented as both a serial and parallel algorithm. These algorithms are shown to offer significant computational efficiency improvement. The simulated performances of an induction machine with a range of interbar resistances are compared to test measurement, and the relative simulation times are compared to other algorithms.