Design Aspects of Three-Phase Inductor Alternators

A design procedure for the three-phase heteropolar type of inductor alternator has been worked out. Expressions for open-circuit-voltage direct- and quadrature-axis reactances of arnature reaction, short-circuit characteristic, and the power output of this type of alternator have also been developed. The stator leakage reactance, which is an important parameter in the design and operation of such alternators has been reviewed. The design procedure has been applied to a typical alternator of this type and test results confirm the procedure.