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alternator operating principle
Curve number 2 is this of the To make the dynamo work even
alternator. The alternator begins at idle speed, the ratio of the
to produce power even at very diameter of the crankshaft pul-
low rpm, which is a great advan- ley to the dynamo pulley was
tage over the dynamo. The curve optimally calculated to make
builds up gradually, and has the dynamo spin faster than the
usable current production be- crankshaft of the engine. This
tween idle speed and maximum caused the dynamo to produce
speed. power at a lower speed. Below
we show the crankshaft pulley
and dynamo pulley of a 1960
34 hp engine.
dynamo pulley
dynamo
crankshaft pulley
Paruzzi Magazine 27 5
CLASSIC CAR PARTS
