Farmall & IHC Tractors Discussion Board |
Re: Re: Re: Re: oops put power to field of gen
[ Expand ] [ View Follow Ups ] [ Post Followup ] [ Return to Forum ]
Posted by Gary_N_WV on September 27, 2003 at 10:57:04 from (69.43.20.75):
In Reply to: Re: Re: Re: oops put power to field of gen posted by Doug in OR on September 27, 2003 at 08:45:08:
A field coil has "resistance"..... any time you pass current thru a resistance, there is a difference of potential across it, sometimes refered to as an "IR drop". And yes....if you ground the field terminal, the generator will charge.....but were is the other end of the wire that a field coil is made up of?....It is connected to the Battery (in one fashion or another). Usually, when the relay that controls the field current is open , there is a small resistance added in series with the circuit. If you look on the bottom of a voltage regulator you will see a wirewound resistor which is wound around a piece of ceramic.....this is the resistance. When 2 resistances are put in the field circuit (the little wirewound one and the "field coil" itself, the battery voltage is devided between them,....lets assume for clarity that both the wire wound and the field coil is of equal resistance...when both are in the circuit, there would be 1/2 the battery voltage across each one....so, your field coil would have 1/2 the voltage across it ...but, when your relay grounds the field, which shorts across the resistor mounted on the voltage regulator, then you have the full battery voltage across the field windings. Anyway, ....this is all "moot".......We have gotten off the track of what "happy" seemed to be concerned about, and that was ...if the generator was ruined by applying battery voltage across the field winding....and I doubt it ! Gary
Follow Ups:
Home
| Forums
Today's Featured Article -
Field Modifications (Sins of the Farmer) - by Staff. Picture a new Chevrolet driving down the street without it's grill, right fender and trunk lid. Imagine a crude hole made in the hood to accommodate a new taller air cleaner, the fender wells cut away to make way for larger tires, and half of a sliding glass door used to replace the windshield. Top that off with an old set of '36 Ford headlight shells bolted to the hood. Pretty unlikely for a car... but for a tractor, this is pretty normal. It seems that more often than not they a
... [Read Article]
Latest Ad:
Sell 1958 Hi-Altitude Massey Fergerson tractor, original condition. three point hitch pto engine, Runs well, photos available upon request
[More Ads]
Copyright © 1997-2024 Yesterday's Tractor Co. All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V. Yesterday's Tractors - Antique Tractor HeadquartersWebsite Accessibility Policy |
|