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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
188 Electric Motors and Drives
Such motors are unlikely to be described by the maker
specifically as deep-bar, but they nevertheless incorporate a
measure of the skin effect and consequently achieve the good
torque-speed characteristic shown in Figure 6.9.
Torque, p.u. Current, p.u.
Figure 6.9 Complete torque-speed and current-speed curves for a
general-purpose industrial cage motor
The current-speed relationship is also shown in Figure 6.9,
and both torque and current scales are expressed in per-unit
(p.u.).
This notation is widely used as a shorthand, with 1
p.u. (or 100 per cent) representing rated value. For example a
torque of 1.5 p.u
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Publisher Resources

ISBN: 9781483105277