NDLI: The Air Gap Reactance of Polyphase Machines

Content Provider	IEEE Xplore Digital Library
Author	Alger, P. L. West, H. R.
Copyright Year	1884
Abstract	This paper presents some new formulas for the differential leakage reactance of distributed polyphase windings, such as those of induction motors and voltage regulators. Previous authors have used two distinct methods for evaluating the differential reactance, but the results obtained by these two methods have been inconsistent, particularly for open slot machines. The overlap method is based on calculating the average overlap of the teeth on the primary and secondary, and then calculating the leakage through the zig-zag flux path under the combined influence of the primary and secondary ampere turns. The ``differential method'' is that of calculating the leakage by taking the difference between the total flux produced by the primary or the secondary, and the fundamental sine wave of the flux. When the effects of flux fringing with open slots are included, the results obtained by the two methods are shown to be entirely consistent. The new formulas derived in this way are believed to be more general in application than any heretofore published. They show that the slot openings decrease the differential leakage reactance much more rapidly than they decrease the magnetizing reactance.
Starting Page	1331
Ending Page	1343
Page Count	13
File Size	2644740
File Format	PDF
ISSN	00963860
Volume Number	66
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1947-01-01
Publisher Place	New York, U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Stators Teeth Rotors Induction motors Belts Magnetic flux Voltage Regulators Wounds Solenoids
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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