Antique Engines and Old Iron
[Home] - [HELP] - [Forums] - [Library] - [Photo Gallery] - [Groups] - [Classified Ads] - [Subscribe] - [Links] - [Books] - [Sponsors] -

Go Back   SmokStak > SmokStak® Vintage Electrical Equipment > Delco and other Low Voltage DC Light Plants
Forgot Password? Join Us!

Notices

Delco and other Low Voltage DC Light Plants Antique Generators, Light Plants, Typically 24, 32 or 48 volt although some are 110 volt. DC Lamps, Motors and appliances.

Delco and other Low Voltage DC Light Plants

General Generator Question


this thread has 5 replies and has been viewed 702 times

Reply
 
Thread Tools Display Modes
  #1  
Old 01-28-2018, 03:09:36 PM
Mike Cushway Mike Cushway is offline
Registered-III
 
Join Date: Jul 2005
Location: Kenton, Michigan, USA
Posts: 228
Thanks: 5
Thanked 23 Times in 20 Posts
Default General Generator Question

I would like to throw this out to you guys.....

Would a vintage 24v Delco-Remy generator/regulator in good condition and properly adjusted for speed/output be a viable option for occasional charging of a 24v battery bank? I would enjoy the challenge of putting something like this together with an old engine. Mike in the frozen north.
Reply With Quote
Sponsored Links
  #2  
Old 01-28-2018, 04:04:54 PM
Vanman Vanman is offline
Subscriber
 
Join Date: Aug 2011
Location: Mission Viejo, California
Posts: 4,836
Thanks: 6,475
Thanked 2,082 Times in 1,421 Posts
Default Re: General generator question

Absolutely! The power available will be determined by the HP of your engine, up to the limit of the generator, of course.
Reply With Quote
  #3  
Old 01-28-2018, 05:13:38 PM
Mike Cushway Mike Cushway is offline
Registered-III
 
Join Date: Jul 2005
Location: Kenton, Michigan, USA
Posts: 228
Thanks: 5
Thanked 23 Times in 20 Posts
Default Re: General generator question

Is there a general formula for determining the HP needed.....I can do the math if you can just get me started on the correct path. How do I determine what is a safe output from the generator?
Reply With Quote
  #4  
Old 01-28-2018, 06:58:29 PM
Mike Cushway Mike Cushway is offline
Registered-III
 
Join Date: Jul 2005
Location: Kenton, Michigan, USA
Posts: 228
Thanks: 5
Thanked 23 Times in 20 Posts
Default Re: General generator question

Looking at my well frozen '48 JD-A this afternoon, it looks like the generator is turning engine speed +/- a tad. Crank to cam at 1:2 and then cam to fan bevel gears at 2:1(29:15 actuall). Say around 1000 rpm. This suprises me. I would have thought a lot more. The 24v two cylinder diesel models will be close to this as well. So I am looking at generators in this speed range.....I think
Reply With Quote
  #5  
Old 02-14-2018, 09:39:43 PM
dkamp dkamp is offline
eMail NOT Working
 
Join Date: Oct 2007
Location: LeClaire, Iowa, USA
Posts: 1,475
Thanks: 31
Thanked 742 Times in 489 Posts
Default Re: General generator question

As you increase the rotating speed of the generator armature, it's output voltage will increase.

There's no need to spin it any faster than what's necessary to charge, but...

Your charging rate is determined by cell acceptance at the applied voltage...

And the output voltage rises as you apply more current to the generator's FIELD...

To make it more complicated... as you apply more voltage to the generator field, it's current rises, causing the armature to produce a higher output voltage.

So it's a balancing game. It will work... it'll require a little tweaking to get it where you want it... BUT... what you DON'T want to do, is put a really small pulley on the generator shaft to make it spin faster. While this DOES work, the amount of belt contact surface decreases, which limits the amount of power that the belt can transmit (traction surface) and also makes the bend on the belt much tighter, which increases wear and tear on the belt, and increases side-load on the generator. If you really need to increase the speed, use a larger engine-side pulley, or a jackshaft with small driven and large drive to step up the speed ratio.

Yes, you can get a fair estimate of how much generator input power is required to make the generator's required input for a given charging power.

1 Horsepower = .745 Kilowatt hour...

Or also said... 1hp equates to just under 750w.

Now, 750w equates to 31A....

SO... if your generator is CAPABLE of pushing 31 amps at 24v, you'll need AT LEAST 1hp at the generator's DRIVE SHEAVE to pull that load.

If it's a small belt, on a small pulley... then you won't get there, because there's not enough tractive surface for the belt to transfer that much power.

If you run a larger sheave (greater contact radius) and larger belt (larger contact sides), then it certainly WILL pull 1hp. Running larger sheaves at BOTH ends will reduce the belt surface load, so it'll be come more capable of handling the load. Also realize that this also increases the transmission efficiency of the belt drive... if you choose a less-efficient belt setup, you'll need more shaft HP to drive the generator.

Last edited by dkamp; 02-14-2018 at 10:06:15 PM.
Reply With Quote
The Following 2 Users Say Thank You to dkamp For This Post:
  #6  
Old 02-15-2018, 07:31:13 PM
Mike Cushway Mike Cushway is offline
Registered-III
 
Join Date: Jul 2005
Location: Kenton, Michigan, USA
Posts: 228
Thanks: 5
Thanked 23 Times in 20 Posts
Default Re: General generator question

DKamp,
Thank you for the nice explanation. I was planning on using a vintage Wisconsin ABN and Lovejoy couplings inline. I can regulate the speed of this engine very well. Longterm, I hope to convert it to LP.
Reply With Quote
Reply

Bookmarks


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

F o r u m Jump

Similar Threads Chosen at Random
Thread Thread Starter F o r u m Replies Last Post
General diesel question Handyhiker1 Onan Generators 40 06-07-2017 10:07:52 PM
General Electric TAB 20 kw generator. Lanzb Generators & Electric Motors General Discussion 1 03-11-2017 08:31:59 PM
general question about tubing wayne57 Welding Shop 2 04-12-2013 01:09:22 PM
general question about Generator Andrew Albrecht Generators & Electric Motors General Discussion 18 07-20-2012 05:09:35 PM
general genny question Economy Bob Generators & Electric Motors General Discussion 7 06-04-2007 07:07:31 PM


Use "Ctrl" mouse wheel to change screen size.
All times are GMT -4. The time now is 10:45:53 PM.

Smokstak and Enginads site search!


All use is subject to our TERMS OF SERVICE
SMOKSTAK® is a Registered Trade Mark - A Community of Antique Engine Enthusiasts
Copyright © 2000 - 2016 by Harry Matthews P.O. Box 5612 - Sarasota, FL 34277