Tractor Talk Discussion Board |
Re: Re: Re: Re: 24 volts down to 12 volts.
[ View Follow Ups ] [ Post Followup ] [ Return to Forum ]
Posted by MarkB on July 04, 2000 at 03:27:11 from (198.110.22.248):
In Reply to: Re: Re: Re: 24 volts down to 12 volts. posted by Paul on July 03, 2000 at 05:47:39:
The reason that one battery will get overcharged and the other will get undercharged is that the charging current through the two batteries is not the same. (Kirchoff's Current Law.) Let's say that your charging current is 10 amps and the headlights draw 5 amps. The battery that isn't connected to the lamps will get the full 10 amps, while the battery connected to the lamps will only get 5 amps. The result over time is that the first battery will get overcharged and the second battery will get undercharged. The generator output is a fairly constant 28 volts. As the voltage across the overcharged battery rises, the voltage across the undercharged battery must drop (Kirchoff's Voltage Law). At some point in time, the overcharged battery will rise above 16 volts, and the undercharged battery will drop below 12 volts. The undercharged battery will stop charging at this point and will eventually go dead. I experienced this phenomena first-hand in a JD 5010 with a 24 volt system. This was many years ago before I learned Kirchoff's Laws.
Follow Ups:
Home
| Forums
Today's Featured Article -
New Hitches For Your Old Tractor - by Chris Pratt. For this article, we are going to make the irrational and unlikely assumption that you purchased an older tractor that is in tip top shape and needs no immediate repairs other than an oil change and a good bath. To the newcomer planning to restore the machine, this means you have everything you need for the moment (something to sit in the shop and just look at for awhile while you read the books). To the newcomer that wants to get out and use the machine for field work, you may have already hit a major roadblock. That is the dreaded "proprietary hitch". With the exception of the
... [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 |
|