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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
Electric Motors
21
P
a
BAD
2
La>. (1.11)
Equations
1.10 and 1.11
emphasize
the
importance
of
speed
in
determining power output.
For a
given power,
we
can choose between
a
large low-speed motor
or a
small
high-speed one.
The
latter choice
is
preferred
for
most appli-
cations, even
if
some form
of
speed reduction (using belts
or
gears,
for
example)
is
needed. Familiar examples include
portable electric tools, where rotor speeds
of
12,000 rev/min
or more allow powers
of
hundreds
of
watts
to be
obtained,
and electric traction, where
the
motor speed
is
considerably
higher than
the
wheel speed.
In
these examples, volume
and
weight
are at a
premium,
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Publisher Resources

ISBN: 9781483105277