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wacker/kohler 180 Hz 240v genset (HGG)kohler


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  #1  
Old 01-27-2019, 09:23:22 PM
miraclewhip miraclewhip is offline
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Question wacker/kohler 180 Hz 240v genset (HGG)kohler

Bought this for emergency power supply for refrigerator.Bad news! Now have new Refrigerator!didn't know it was 180Hz. Is there a practical modification to allow 60Hz power delivery? The Kohler K series engine powers the Kohler generator. The refrigerator didn't adapt to 180 Hz very well!
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Old 01-27-2019, 09:46:03 PM
Zephyr7 Zephyr7 is offline
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Default Re: wacker/kohler 180 Hz 240v genset (HGG)kohler

180Hz? Thatís an oddball frequency. Usually you see either 60Hz (North America), 50Hz (most of the rest of the world), and 400Hz (aircraft APU).

If youíre seeing 180Hz, then Iím guessing your meter is not reading correctly, or youíve found some ultra oddball unit, or maybe (but unlikely) you have an APU that someone tried to slow down to 60 Hz (which wonít work).

You can sometimes bring a 50 Hz set up to 60Hz with a speed adjustment, and usually a setting on the voltage regulator too. If you have a 400 Hz set and have electronics skills, itís easy relatively easy to rectify the 3 phase 400Hz power into DC and then build a PWM inverter to make 60 Hz AC from that.

Bill
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Old 01-27-2019, 10:18:47 PM
Ed Radtke Ed Radtke is offline
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Default Re: wacker/kohler 180 Hz 240v genset (HGG)kohler

sounds like generator for concrete vibraters
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Old 01-27-2019, 11:43:00 PM
Steve Dawkins Steve Dawkins is offline
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Default Re: wacker/kohler 180 Hz 240v genset (HGG)kohler

^ and some old electric jackhammers. That's the only time I've seen 180 Hz. Not aware of any way to reconfigure for 60 Hz. I don't know what size engine or generator you have, but maybe you can buy a 60 Hz gen head from Northern Tools that will bolt up to your Kohler engine. It will probably be easier to just try to sell the Wacker genset and buy a 60Hz generator. Wacker equipment is designed for the construction industry.

I'm sorry for your misfortune, but your comment "The refrigerator didn't adapt to 180 Hz very well!" made me laugh.
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Old 01-28-2019, 12:01:12 AM
Birken Vogt Birken Vogt is offline
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Default Re: wacker/kohler 180 Hz 240v genset (HGG)kohler

It would make sense since Wacker is a construction equipment brand.
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Old 01-28-2019, 02:21:23 AM
Vanman Vanman is offline
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Default Re: wacker/kohler 180 Hz 240v genset (HGG)kohler

And chainsaws too! Probably numerous portable tools. Homelite, for one, made many 180 cycle, three phase tools and generator sets.

I'd turn that dude down to 1200 rpm, thus delivering 60 cycle current. This assuming it's 3600 rpm to begin with.

Don't know what kind of excitation this one employs, but something could be worked out to make it work at the slower speed.

The output voltage would be 1/3 of nameplate, so a transformer would be used to step it back up the desired value. Power output would be ~1/3, a bit less on a continuous basis due to reduced airflow through the generator.
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Old 01-28-2019, 10:07:11 AM
Zephyr7 Zephyr7 is offline
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Default Re: wacker/kohler 180 Hz 240v genset (HGG)kohler

Is that 180Hz stuff still being made? If not, when was it made? Iíve never seen any of it and Iíve seen a lot of old gear.

Bill
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Old 01-28-2019, 11:11:23 AM
Steve Dawkins Steve Dawkins is offline
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Default Re: wacker/kohler 180 Hz 240v genset (HGG)kohler

We rented an electric jackhammer to use on a jobsite in the early 1970s. I remember that it was supplied with a Homelite 180 Hz portable generator, probably in the 4-5 kW range. It may have even supplied 3 phase for the hammer. I remember the power cord was twist-lock, but don't recall the number of poles. You could use the generator to power incandescent bulbs and power tools with universal motors. You definitely could not connect it to induction motors or lighting that used magnetic ballasts that were rated for 60 Hz.

The electric jackhammers that we rented in the past 20 years all operated on 120V, 60 Hz. I have heard of 180 Hz concrete vibrators, but all the ones I saw on jobsites had universal motors, and would operate on standard 60 Hz power.
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Old 01-28-2019, 11:24:24 AM
J.B. Castagnos J.B. Castagnos is online now
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Default Re: wacker/kohler 180 Hz 240v genset (HGG)kohler

Could you rectify it to dc and use an inverter to get 60 cycle a/c?
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Old 01-28-2019, 01:03:37 PM
Zephyr7 Zephyr7 is offline
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Default Re: wacker/kohler 180 Hz 240v genset (HGG)kohler

Quote:
Originally Posted by J.B. Castagnos View Post
Could you rectify it to dc and use an inverter to get 60 cycle a/c?
Yes, you can! I mentioned this in my post #2. The higher frequency is easier to rectify too (smaller capacitors and inductors needed). The tricky part is the inverter, but thatís not all that difficult either. The generators existing voltage regulator will take care of voltage regulation.

Bill
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