Inductance Coefficients of Three-Phase Inductor Alternators: Part II - Numerical and Experimental Results

In this paper, the various inductance coefficients of three-phase inductor alternators have been theoretically calculated and compared with the results obtained from a test performed on the alternator. The results obtained from the test show a general agreement with the theory derived in [1]. The inductor alternators with an odd number of rotor teeth are found to be similar to ordinary synchronous alternators in respect to their inductance coefficients, but the inductor alternators with an even number of rotor teeth are quite dissimilar as shown in the simplified expressions developed here. The equations developed are also useful in analyzing these alternators under transient conditions.