Fractional-slot and dead-coil windings

P. L. Alger (General Electric Company, Schenectady, N. Y.): This subject of fractional-slot windings is one of perennial interest to designers. There is literally no end to the variety of the problems which arise in practice when the designer endeavors, on the one hand, to use existing punchings for a wide variety of machines, and, on the other hand, to continually meet new requirements of good wave form, low noise, minimum reactance, and other factors. The highly specialized character of these problems, together with their great variety, has caused designers generally to solve them by common-sense methods differing with each individual. Although little has been published on these practical solutions to winding problems, an extensive body of knowledge has been accumulated, which confirms and extends the authors´ results.