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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
31
which
the
conductor
can
safely carry,
the
maximum force
which
can be
developed will vary
in
direct proportion
to the
flux density,
so a
weak flux will lead
to a low
maximum
force
and
vice-versa.
In
addition,
to
achieve
any
given force,
the drop
in
speed will
be
disproportionately high when
we
go
to a
lower flux density.
We can see
this
by
imagining that
we want
a
particular force,
and
considering
how
we achieve
it
firstly with full flux,
and
secondly with half flux.
With full flux, there will
be a
certain drop
in
speed which
causes
the
motional
e.m.f. to
fall enough
to
admit
the
required current. With half
the
flux, twic
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Publisher Resources

ISBN: 9781483105277