Skip to Main Content
Modern Electrical Installation for Craft Students, 3rd Edition
book

Modern Electrical Installation for Craft Students, 3rd Edition

by Brian Scaddan
November 2013
Intermediate to advanced content levelIntermediate to advanced
182 pages
6h 6m
English
Newnes
Content preview from Modern Electrical Installation for Craft Students, 3rd Edition
8 Inductors
and
inductance
Time
( s)
Diagram
8
Example
1.4
When carrying
a
current
of 1.2 A,
each field coil
of a
generator
has an
inductance
of
2.5
H.
Calculate
the
value
of
the energy stored
in
each coil.
W
=
energy stored;
/ = 1.2 A; L = 2.5 H
W =
Vi χ L χ I
2
_
2.5 x 1.2 x 1.2
2
=
1.8 J
Inductance
in a.c.
circuits
Inductive reactance: symbol,
X
L
\
unit,
ohm)
Let
us
now consider
the
effect
of
supplying
an
iron-cored coil
of
negligible resistance with
an
alternating current
and
voltage.
In this instance
the
current,
and
therefore the magnetic field,
is
building
up and
collapsing
(in the
case
of a
50
Hz
supply) 50 times every
second
an
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Electrical Calculations and Guidelines for Generating Station and Industrial Plants

Electrical Calculations and Guidelines for Generating Station and Industrial Plants

Thomas E. Baker

Publisher Resources

ISBN: 9781483106205