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Generators & Electric Motors General Discussion Antique Generators and Old Electric Motors: Questions and answers about restoring and showing old power generation systems.

Generators & Electric Motors General Discussion

Bought a 28 Volt, 300 Ampere Generator today


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  #1  
Old 07-28-2018, 08:02:44 PM
Vanman Vanman is offline
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Default Bought a 28 Volt, 300 Ampere Generator today

It's going to need some work, but that is always the case for the things I end up with.

This will be driven via a transmission PTO on my bus, and will supply power while under way.
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Old 07-28-2018, 08:22:22 PM
Thaumaturge Thaumaturge is offline
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Default Re: Bought a 28 Volt, 300 Ampere Generator today

Good score. Think I might even have a wiring diagram for it in one of my directories. I'll take a look. Those specs would suggest only good for use as an arc welder, or one damn fast 24 volt battery charger.
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Old 07-28-2018, 09:17:34 PM
Vanman Vanman is offline
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Default Re: Bought a 28 Volt, 300 Ampere Generator today

This one is pretty straightforward, electrically. Six pole, shunt wound and interpoles. Will need to use with a voltage regulator and a cut out.

It'll allow me to run two A/C units and charge a Big battery at a pretty good clip.
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Old 07-28-2018, 09:29:47 PM
AngrySailor AngrySailor is online now
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Default Re: Bought a 28 Volt, 300 Ampere Generator today

I was just about to ask about regulation. Your driving this off the transmission PTO right? I notice it’s ooen design, I assume your going to put some shields in it? Maybe duct clean air to it? What’s it weigh
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Old 07-28-2018, 09:51:53 PM
Vanman Vanman is offline
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Default Re: Bought a 28 Volt, 300 Ampere Generator today

This one should have an internal fan but most require an external supply of cooling air. I was thinking to run an air duct to it to give it cooler and cleaner air though. The grilles on the drive end are the exhaust.

It's 125 lbs. The healthy guy we bought it from put it in the trunk for us. It's still there lol.

I'm pretty sure my wife and I can get it out. Then I want to hook it up to power and see how it motors. I'll see about getting video. It's full of dust though, so needs to come apart anyway.
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Old 07-28-2018, 11:48:34 PM
Vanman Vanman is offline
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Default Re: Bought a 28 Volt, 300 Ampere Generator today

Alright, we got it out of the car and onto a furniture dolly without hurting anything lol.

Next I connected a battery charger to the field and some jumper cables between the car battery and the armature, and away she went!

A little vibratey, which would be a lot vibratey at 8,000 rpm, so I need to sort that out. But it sounds pretty cool.

https://youtu.be/Piha4euiEsw
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Old 07-29-2018, 07:56:43 AM
Ed Radtke Ed Radtke is offline
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Default Re: Bought a 28 Volt, 300 Ampere Generator today

Those generators typically dont have a front bearing in them,hence the rough sound when motoring it .
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Old 07-29-2018, 02:07:54 PM
Vanman Vanman is offline
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Default Re: Bought a 28 Volt, 300 Ampere Generator today

Quote:
Originally Posted by Ed Radtke View Post
Those generators typically dont have a front bearing in them,hence the rough sound when motoring it .
That's an interesting possibility! If so the hole the shaft passes through must have very little clearance, or the shaft wouldn't turn at all.

Either way it needs to come apart to get cleaned up and inspected and so forth, so I'll find out what's up then. Hopefully I do not find that the shaft is bent.
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Old 07-30-2018, 09:14:13 AM
Newoldstock Newoldstock is offline
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Default Re: Bought a 28 Volt, 300 Ampere Generator today

That's cool.
I wish I could find stuff like that

You could probably get away with a conventional Alternator regulator, but this has no current limiting function, an old Automotive style 24dvc generator regulator might work.

In my car I am about to make a dump run I am throwing away a pair of 300 amp diodes no one wants.
These are from a very larget electric train charging station.
I am going to pull them back out and sit on them just in case they are something useful to you.
https://www.ebay.com/itm/NEW-Westing...EAAOSwy5ZXCZpm
Look just like this.
Not an uncommon thing I have spares for my spares and I was lightening the ship this week.

Vanman...
I just got back from the dump and realized I threw them in the dump.
Sorry about that if it turns out they might have been useful too you my bad....
I have 2 left I guess I can part with one and still have one remaining for the end of days....

Last edited by Newoldstock; 07-30-2018 at 02:59:41 PM. Reason: Changes.
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