The automatic-start polyphase induction motor

James L. Hamilton
1922 Journal of the American Institute of Electrical Engineers  
electrical and mechanical design of the repulsion-start, singlephase induction motor. The pres nt paper similarly deals with the automatic-start, polyphase induction motor which has very similar characteristics. This automatic-start polyphase motor has come into considerable prominence during the last few years. A large number of motors of this type is now being built and placed in service. While there is considerable literature on the subject of induction motors, there is little information
more » ... ttle information available on this type of motor which in reality is a combination of two types of motors, a very high-resistance-rotor induction motor and a low-resistance-rotor induction motor. The motor is converted from a high-resistance-rotor motor at starting, to a low-resistance-rotor motor running by means of an automatic switch. The objects of this paper are: 1. To set forth the general characteristics of this type of motor as compared with other standard types of motors. 2. To outline a commercially practical method of studying electrical design of existing motors, and pre deter mining the electrical design of proposed motors. 3. To discuss the mechanical design.
doi:10.1109/joaiee.1922.6593862 fatcat:l7tqxddjkjhohg4staalrz7tpy