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Re: H Gen
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Posted by John T on October 22, 2005 at 18:53:15 from (66.244.90.98):
In Reply to: H Gen posted by HARMER #1 on October 22, 2005 at 18:14:06:
Harmer, I, with all due respect, DO NOT AGREE with what the fellow told you. Its just the OPPOSITE, it will run wide open if grounded, but no charge if its left unattached. Maybe hes getting Class A (Farmalls) and Class B (some Fords) mixed up?? Heres my story: On a Class A charging system, if the external Field post on the Generator IS NOT grounded at all, you only get minimal or no charging cuz theres no Field current to make a strong electromagnetic field in which the Armature rotates. ON a Class A system, the Field post REQUIRES A GROUND, cuz it receives its input supply voltage via the Armature post (via the 3rd brush if a 3 brush gen) but then MUST HAVE A GROUND RETURN PATH for current to flow through the Filed windings to produce the electromagnetic field. On a Class B system NOT WHAT YOU HAVE the field is grounded internally and the Voltage Regulator controls what "voltage" the field gets. Soooooooooo, on your system if the Field is ALWAYS DEAD GROUNDED shes always at MAX CHARGE. However, what the light switch does is supply a dead ground for the Field for HIGH CHARGE like when lights are on, but a ground via a resistor for LOW CHARGE like when lights are off. If shes always dead grounded, you cant get any LOW charge condition so DONT DEAD GROUND THE FIELD, LET THE LIGHT SWITCH SUPPLY THE DEAD (high charge) OR RESISTIVE GROUND (low charge) Thats my story n Im stickin to it !!!!!!!!!! John T, retired electrical engineer
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