Re: VR technical question

Posted by John T on May 03, 2020 at 05:37:35 from (45.16.200.171):

In Reply to: VR technical question posted by Patsdeere on May 02, 2020 at 20:54:59:

Pat, your question "what the max field current would be" might be available if you had the specs for the exact Generator and Voltage Regulator you're using. I don't have any specs or data from which to find any of that but can give you some basic information. Field current is a function of the generators field winding resistance and the Voltage Regulators control.

The VR acts similar to a pulse controller as it, versus a manual Low/High fixed charge control light switch system which uses a fixed value resistance, switches/chatters the field current versus it being a constant value. Obviously, the absolute Max field current would be I = V/R if you know the Gennys total field winding resistance. IE at 12 Volts with 4 total ohms of field winding resistance the field current would be 12/4 or 3 amps. EXAMPLE ONLY NOT INTENDED AS ACCURATE It would take a quality ohm meter to measure the relatively low field resistance, but hey that's a start, give it a try !!!!

That being said and remember there are tons of different Generators and Voltage Regulators and I have no specs or data to answer your question, I have seen or read data where the field current might be less then one up to 3 or more amps. That can be true on a 6 or a 12 volt system.

The max current would be a number that yields the most magnetic field strength WHICH HOWEVER allows the heat to be dissipated and the windings not to overheat.

SORRY I CANT TELL YOU THE MAX FIELD CURRENT. Maybe if someone has you Generator and VR data they may be able to find it. Adjusting the VR is a bit tricky and technical (requiring accurate meters) and again you need the exact specs, I don't get into that over the net, I think Professor Jim or Bob have at times posted some Delco literature pages covering that but again it has to be for your system.

Sorry best I have to offer absent any data whatsoever. See if you can find some Delco literature, its out there

John T

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