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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
Conventional d.c. Motors 95
The solution to the problem of overcurrents lies in pro-
viding closed-loop current-limiting as an integral feature of
the motor/drive package. The motor current is sensed, and
the voltage V is automatically adjusted so that rated current
is either never exceeded or is allowed to reach perhaps twice
rated value for a few seconds. We will discuss the current
control loop in Chapter 4.
SHUNT,
SERIES AND COMPOUND
MOTORS
Before variable-voltage supplies became readily available,
most d.c. motors were obliged to operate from a single d.c.
supply, usually of constant voltage. The armature and field
circuits were therefor ...
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Publisher Resources

ISBN: 9781483105277