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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
D.C. Motor Drives 115
most 2-pulse ones. Overall, the motor then behaves much as
it would with pure d.c, though the I
2
R loss is higher than it
would be if the current was perfectly smooth.
In some small 2-pulse drives, however, there is insufficient
armature inductance to prevent the current from falling to
zero for part of each cycle. This is known as the 'discontin-
uous current' mode, and it is usually encountered when the
motor is lightly loaded. It is very undesirable because when
the current is discontinuous, the mean voltage from the con-
verter falls dramatically as the mean current drawn by the
motor is increased, and in addition th
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Publisher Resources

ISBN: 9781483105277