Calculation of Machine-Slot Parameters by Complementary Variational Technique

Abstract

Complementary formulations of a machine-slot problem are derived by the systematic partitioning of a standard error form that pertains to mismatch in constitutive relationships. The theory indicates that complementary solutions of the harmonic eddy current problem do not provide upper and lower bounds. Finite element computational results, for a number of coarse meshes at different frequencies, support the theory, but suggest that complementary estimates do tend to envelope the exact values of slot resistance and inductance.