In order for the output of the alternator to charge the battery and run other vehicle
components, it must be converted from alternating current to direct current. The
component most suitable for this task is the silicon diode. In order to full-wave
rectify the output of a three-phase machine six diodes are needed. These are
connected in the form of a bridge in a rectier pack. Many rectiers now include
two extra diodes that pick up extra power from a centre connection to the stator.
A regulator, which controls rotor magnetic eld strength, is used to control the
output voltage of an alternator as engine speed and current demand change. ...
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