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How do Farmall regulators work?
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Posted by Marvin on September 27, 1999 at 17:06:36 from (134.134.248.22):
I have been doing some troubleshooting and work on my generator and my Super A electrical system. I have also went through the archives and read the articles on the 2 brush and 3 brush genrators and how they work. I have taken my generator apart and have taken an ohmmeter to generate a schematic of the the genrator and the regulator in order to understand how it works so that I can trouble shoot it better in the future.
I have two questions.
1) The field needs voltage or magnetism when the armature first starts turning to get current to flow to so that the field can build. There cutout relay is normally open, so no volatge is coming from the battery to get the field to function, so is there some residual magnetism in the field that allows the armature to start generating current? Is this why you need to polarize the generator so that the residual magnetism is of the right polarity so that current will flow int eh right direction?
2) The regulator is only a cutout relay with no voltage or current relays. This leads me to believe that the cutout relay will be open until the generator raise the voltage and current level enough to close the relay and will stay closed until the tractor is turned off or if the idle is slow low that the voltage drops low enough for the cutoff relay to drop out. Is this true? It seems that there really is not any regulation here at all. just a method to prevent the genrator from discahrging the battery when the tractor is off. When the tractor is on the battery is basically being charged all the time. The rate of charge is just a function of the dash board switch.
Am I out in left field here?
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