Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 420
ors of all polyphasewound-rotor induction motors whether the motor is built fora two-phase or a three-phase circuit. This fluctuation is alsopresent in the squirrel-cage motor, but to a very small degreeas the number of phases in the rotor is very great. Types of Rotors.—AVound rotors are built in… … Fig. 468.—Phase-wounil rotor with internal starting resistance. Fig. 468 shows a wound rotor in which the resistance ismounted on the spider. The resistance is made in three parts,one part for each phase, and consists of cast-iron grids in-closed in a triangular frame which is bolted to the end…
Electric machinery
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