The Repulsion-Start Induction Motor

The repulsion-start induction motor for single-phase current has come into considerable prominence during the last 10 or 15 years, as is fully attested by the large number of motors of this type now in operation, and by the increasing demand and production. While there is considerable literature available on the subject of repulsion motors, both compensated and non-compensated, and on induction motors, there is comparatively little information available on the repulsion-start induction motor, which is really a combination of two distinct types of motors. The objects of this paper are: 1. To set forth the general characteristics of this type of motor and compare them with similar characteristics of direct-current motors and other alternating-current motors. 2. To outline a definite and commercially practicable method of studying the electrical design of existing motors and of pre-determining the electrical design of new or proposed motors. 3. To discuss the mechanical design and construction.