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Automobile Electrical and Electronic Systems, 5th Edition
book

Automobile Electrical and Electronic Systems, 5th Edition

by Tom Denton
September 2017
Intermediate to advanced
700 pages
28h 19m
English
Routledge
Content preview from Automobile Electrical and Electronic Systems, 5th Edition
Ignition
274
7.1.2 Generation of high tension
If two coils (known as the primary and secondary) are wound on to the same
iron core then any change in magnetism of one coil will induce a voltage into
the other. This happens when a current is switched on and off to the primary
coil. If the number of turns of wire on the secondary coil is more than the
primary, a higher voltage can be produced. This is called transformer action
and is the principle of the ignition coil.
The value of this ‘mutually induced’ voltage depends upon:
• The primary current.
• The turns ratio between the primary and secondary coils.
• The speed at which the magnetism changes. ...
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Publisher Resources

ISBN: 9781317931287