Cleaning up a generator waveform

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greiswig
Posts: 1002
Joined: Wed Jun 20, 2007 8:19 pm
Location: Oregon

Cleaning up a generator waveform

Post by greiswig »

Okay, this is definitely not amp-related, and maybe belongs in the garage talk section for a number of reasons, but...

I moved into a house in the country recently, and got a 6.5kW diesel generator to use when the utility lines have trees disconnect them. I put an o-scope on the output yesterday, and the waveform is pretty noisy.

This group is about the best I know if in terms of electronic design, and I'm wondering if anyone here knows how I could build some sort of power conditioner on the cheap that would make the waveform clean enough that I didn't worry much about operating some electronics like PC's, fridges with ECU's in them, etc.

Thanks!
-g
BobW
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Joined: Mon Feb 06, 2006 8:15 pm
Location: Huntsville, AL

Re: Cleaning up a generator waveform

Post by BobW »

Are you measuring w/ no load? If so, try w/ a minimum 30% load.
you may be seeing inductive noise from the generator unloaded. An ECU and most motor operated devices can take the noise since the spikes contain very little energy (area under the spike curve)

A lot of UPS maunfacturers (the online models) employ power factor correcting that allow universal inputs typically (80 -170 VAC). the output is a clean 120 / 240 VAC depending on the make and model.

HTH
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selloutrr
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Joined: Sun Oct 14, 2007 2:44 am
Location: Southern California

Re: Cleaning up a generator waveform

Post by selloutrr »

you may benefit from a constant voltage transformer and or an isolation transformer i've had great success with the sola brand
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