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Farmall & IHC Tractors Discussion Board |
Voltage regulators again
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Posted by Bus Driver on January 30, 2001 at 07:53:24 from (207.144.130.21):
Here is what I believe I know, so far. Bob M can help me, I know. When I get this sorted out, I may be able to pose as an "expert". The third brush in some generators served to limit the maximum amperage output of the unit. Without some control, the amperage output would rise to the point that heat would destroy the armature. Voltage output is directly proportional to the speed of the generator. The early units depended on the battery and the limited speed to "control" the voltage. A voltage regulator was added to the cutout in the next evolutionary step. The third component added to the regulator was the current (amperage) control. This eliminated the third brush in the generator. My question arises because it looks as if some 2 brush generators use the regulator with only the cutout and the voltage regulator coils. Limiting voltage output also serves to limit current output. But how is the current (amperage) controlled with a 2 coil regulator, 2 brush generator, if the tractor battery is very low and the tractor is jump started? Amperage output would be very high for a time while battery voltage is restored.
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