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THIS paper treats a system consisting of two wound-rotor induction motors, with rotors paralleled through slip rings, the speed of which is controlled by a frequency changer connected to the slip rings. The system is a form of synchronous tie in which the driving motors and selsyns are incorporated in one machine. The block diagram in Fig. 1 gives a general picture of the system.
American Institute of Electrical Engineers, Part II: Applications and Industry, Transactions of the (Volume:74 , Issue: 2 )
Date of Publication: May 1955