Abridgment of design and application of two-pole synchronous motors

The paper presents a brief re´sume´ of the problems encountered in the design of two-pole high-speed synchronous motors, together with a description of how they are met. A satisfactory design is worked out. The theory of the starting winding is given briefly in non-mathematical language, and curves are presented showing the results obtained in-so-far as current and torque are concerned. It also outlines the applications in which these motors have been used pointing out both the advantages and the limitations of synchronous motors. This is followed by a description of the operating characteristics and of the method of controlling the motors.