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Electric Motors and Drives
book

Electric Motors and Drives

by Austin Hughes
October 2013
Beginner to intermediate content levelBeginner to intermediate
316 pages
13h 14m
English
Newnes
Content preview from Electric Motors and Drives
OPERATING CHARACTERISTICS OF
INDUCTION MOTORS
This chapter is concerned with how the induction motor
behaves when connected to a constant frequency supply.
This remains by far the most widely used and important
mode of operation, the motor running directly connected to
a constant-voltage mains supply. Three-phase motors are the
most important, so they are dealt with first.
METHODS OF STARTING CAGE MOTORS
We have seen that the starting current in a cage motor
supplied at rated voltage is perhaps five or six times rated
current, at a low power-factor. Where the impedance of the
supply system is low, the volt-drop caused by even such a
large curren ...
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Publisher Resources

ISBN: 9781483105277