The Challenge: Recharge a Battery
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We now need to 'harvest'
the electricity and take it to the battery using wires. The coil can't
just be connected directly to the battery because as the armature turns,
the wires would quickly become twisted. In addition, to charge a battery
we need direct
current rather than alternating
One answer would be
to use a rectifier.
Rectifiers need special materials, so on the island we used a commutator
to produce a direct current.
How can we take
electricity from the generator?
In order to take electricity from the generator we need to use a type
By connecting the
sliding connection brushes to each end of the coil in turn we capture
a direct current as the armature turns.
Getting current into the battery