Abstract

Commercial applications of “angle switching” of synchronous motors are given especial attention in this paper. “Angle switching” refers to a method of starting synchronous motors whereby the time of application of the excitation voltage with respect to the relative angular position of the Field poles and the impressed voltage is controlled. The advantages of this method of starting are pointed out, the equipment is described briefly, and a number of practical applications in which increased starting torque, reduced starting current, or other features were obtained are described.

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