Re: 12 volt bat 6 volt gen

Posted by Gerald J. on September 01, 2004 at 19:50:18 from (67.0.95.56):

In Reply to: 12 volt bat 6 volt gen posted by Don E. Foster on September 01, 2004 at 08:14:28:

Yes but you need a 12 volt regulator and probably a smaller pulley on the generator shaft since it has to turn between 1.5 and twice as fast to develop 14 volts than it turned to develop 7 volts. Then generators have tended to not charge at low engine speeds anyway.

Some below said the generator was constant watts. That's NOT TRUE. Its good for the same current no matter the voltage. The current capability is dependent ONLY on the wire size in the armature. It heats the same from 30 amps load whether the output is 1 volt or 40 volts.

A generator with cutout in the regulator tends to discharge when running just a little below its minimum charging speed. The relay cutout can take as much as 10 amps discharge current before it cuts out. That reduces charging productivity.

An alternator uses silicon diodes to rectify and they also serve as efficient cut out to make sure the alternator never discharges (other than filed current so long as all the diodes are good).

Many tractor generators were selected based on the tractor starting only a couple times a day and running for half a day before the next start. Like the JD 4020 gas with a 20 amp generator and the 4020 diesel with a 10 amp 24 volt generator. I know a one wire alternator works much better on my 4020 gas. Instead of a year or two battery life with regular needs for charging to get it to start after sitting. With the alternator the battery isn't being abused and acts like it will last a long time. I put a small diameter pulley on the 10SI so it spins fast and once it starts charging it will charge as slow as the engine will run.

Gerald J.

Follow Ups:

Post a Followup Name: E-Mail: Subject: Comments: Optional Link URL: Link Title: Optional Image URL: Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]