low RPM diesel genertor

Boeing · Dec 9, 2011

I don't know how I lost it.....
Someone here had commented on diesel generators and posted a LINK to an outfit that sells low RPM (540) diesel generators.....small about 5000 watts I think.
Anyway I went to that link and sent them several questions. They have NOT answered (5 days) so I want to CALL them.
Now I can't find the link and don't remember the name of the company.
Could someone help my feeble brain?
Thanks

schmism · Dec 10, 2011

Boeing said:
I don't know how I lost it.....
Someone here had commented on diesel generators and posted a LINK to an outfit that sells low RPM (540) diesel generators.....small about 5000 watts I think.
Anyway I went to that link and sent them several questions. They have NOT answered (5 days) so I want to CALL them.
Now I can't find the link and don't remember the name of the company.
Could someone help my feeble brain?
Thanks

There are no 540 rpm generator heads. There may be gen heads that can be driven by 540rpm inputs but they have either a gear drive or belt drive to speed up the rpm for the genhead.

slowest genhead youll find is going to be 1800rpm (4poll)

Craig Clayton · Dec 11, 2011

The RPM of the generator is a function of the number of poles of the winding. There is a formula for this but I will keep it easy.

A ( Briggs engine ) runs at 3600 rpm because the generator has 2 poles.
This is the same as a 3600 rpm electric motor that has 2 poles.

A ( larger engine ) runs at 1800 rpm because the generator has 4 poles.
This is the same as a 1800 rpm electric motor that has 4 poles.

Big (slow speed engines ) can run slower so more poles are added to the generator
That is how you get 1200 rpm on a electric motor it has 6 poles.

Large electric motors turn at 800 rpm which are 8 poles.

Now the really big boys at Niagra Falls, Hoover etc still need to make 60 Hz ( house electricity ) and turn slower but I do not know the number of poles but they have to follow the formula.

So when you put 540 rpm from your tractor to a gear head this is what the gear head does to the generator.
I did not reference inverter generators , sine wave converters or freq converters.

Craig Clayton

TimberXX · Dec 11, 2011

Are you looking for a 5500 watt pto generator?

Good luck, we looked for a long time and found nothing under 10k

MotorSeven · Dec 11, 2011

TimberXX said:
Are you looking for a 5500 watt pto generator?

Good luck, we looked for a long time and found nothing under 10k

Why such a small generator for a pto? I have a 24KW and I have to turn 2000 rpms to hit the sweet spot which is just under a gallon per hr. I doubt there would be much savings in fuel turning a smaller generator head.

7200 is the closest I can find:
http://www.northerntool.com/shop/tools/product_200308467_200308467

TimberXX · Dec 11, 2011

Yeah I forgot the northern tool head.

We were looking for a pto generator for a tractor with 11 hp at the PTO

K5OIT · Dec 11, 2011

Try Central Maine Diesel Generators | Diesel Generators | Triple-Fuel Generators | Propane/Natural Gas Generators. $3375.00.

K5OIT · Dec 11, 2011

Oops! looks like I did it again. You want a pto unit. I was thinking(?) a standalone. Sorry for the confusion!

Mickey_Fx · Dec 11, 2011

We don't know what kind of genny Boeing is looking for since he has not been back since his initial post 2 days ago. By the mention of diesel, one would think self contained but the mention of 540 rpm give the impression of a pto mounted gen with a drive head attached.

Maybe Boeing will come back and clarify what he is talking about.