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Garden Tractors Discussion Forum

Attaching an alternator to a tractor to power an inverter

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Greenfrog

01-31-2019 17:17:34




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I have pto pulley on my CC108 and 129. I want to attach an automotive alternator via a belt to generate AC volts to run an inverter....
Question: what type, size, etc. might work best? How to mount?attach? ... I would rig up something Any suggestions? Wiring.? Will it work?




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DoubleO7

03-16-2019 07:52:09




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 Re: Attaching an alternator to a tractor to power an inverte in reply to Greenfrog, 01-31-2019 17:17:34  
Quoting Removed, click Modern View to see

You can get 120 AC volts the hard and complicated way or the easy, clean and simple way.

Get a Fabco Powermite 110, it even looks exactly the same as a Cub Cadet starter/generator.

Paint it the CC yellow and everyone would think it was a factory option.



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Married2Allis

02-01-2019 07:19:31




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 Re: Attaching an alternator to a tractor to power an inverte in reply to Greenfrog, 01-31-2019 17:17:34  
Belt-driven Pincor generators were once available to install on Cub Cadets using the front end PTO mount. A QA42 snowblower mount may be a good start to building a platform for a belt-driven generator like this one available from NT. Your IH 129 would handle 5000 watts - requires 11hp and 3600 rpm. It's safe for electronics, has +/- 5% THD rating. Probably more practical than rigging up a large inverter.

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Texasmark1

02-27-2019 16:53:17




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 Re: Attaching an alternator to a tractor to power an inverte in reply to Married2Allis, 02-01-2019 07:19:31  
6.7 hp to get your 5kw, plus 10-20% loss for efficiency has you up at 8 hp. 11 hp requirement would leave you 3 hp for transient loads, make for a very good power source to drive through things like compressor starts pulling on the generator. If you can stand the price, sounds like a winner. I bought quite a few things from NT and their ratings worked just fine for me.



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Texasmark1

02-01-2019 07:02:18




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 Re: Attaching an alternator to a tractor to power an inverter in reply to Greenfrog, 01-31-2019 17:17:34  
Watts in (VxA, PF=1 if talking about AC circuits) equals watts out minus losses....746 watts per 1 HP. Keep in mind that to work for you, if you are using an RPM rated unit, you may be running a 400 cu inch engine at redline RPMS to get the RPM ratio to run your 400 watt generator/alternator at 400 watts. Neighbor's boy had one years ago, don't remember anything about the unit but I installed it in his truck, of similar sized engine, at his request, and what I said above is what happened. Efficiency??????? Totally sucked! Turned me off them right away.

Course technology and all today, surely things are better now.

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greentoad

02-01-2019 06:24:53




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 Re: Attaching an alternator to a tractor to power an inverter in reply to Greenfrog, 01-31-2019 17:17:34  
I'm gonna build one of these suckers. Already have an inverter that is 2000W/4000PEAK. Do I have to put a battery in-between the alternator and the inverter is the VR on the alternator good enough to regulate input voltage?



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Jeffcat

02-03-2019 19:58:10




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 Re: Attaching an alternator to a tractor to power an inverter in reply to greentoad, 02-01-2019 06:24:53  
You absolutely need a battery to act as a buffer. The whole system will be totally unstable and most likely one or both will fry very quickly. Maximum smoke.



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Bob

01-31-2019 18:15:24




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 Re: Attaching an alternator to a tractor to power an inverter in reply to Greenfrog, 01-31-2019 17:17:34  
"I want to attach an automotive alternator via a belt to generate AC volts to run an inverter...."

Your post is a bit confusing, by definition, inverters convert DC current to AC current, so you don't want AC Volts to run an inverter, IMHO.

I'm gonna GUESS you want a 120 Volt AC power source?

If that's what you want, I think CC dealers sold PTO driven AC generators, for sure DEERE did.

Here's a link to a thread posted by someone who fabricated one.

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Jeffcat

01-31-2019 17:54:01




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 Re: Attaching an alternator to a tractor to power an inverter in reply to Greenfrog, 01-31-2019 17:17:34  
Lots of how to videos on Utube. You need a very small altinator like Hitachi makes, a darn fast engine or engine pulley to altinator ratio speed, a very large storage battery, and a honking big inverter. Will never work like a portable generator from Lowes. Made a super duper portable battery charger many years ago with a ten horse motor if memory serves and no inverter just straight big storage battery. It really worked but not very practical. Just take a garden tractor and jumper cables.

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