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Kohler Generators

voltage regulator question

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Old 09-19-2012, 11:44:17 PM
mongoose969 mongoose969 is offline
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Default voltage regulator question

has anyone measured the output voltage to f1/f2 fields on 6 ohms slip rings 4kw genset when running at 120vac no load?
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Old 09-20-2012, 07:59:47 AM
BergmanJ BergmanJ is offline
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Default Re: voltage regulator question

Please provide full / complete Model, S/N, Spec. number; so that the Kohler gurus can actually help you.

Regards, JLB
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Old 09-20-2012, 07:43:39 PM
LWB250 LWB250 is offline
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Default Re: voltage regulator question

No one can tell you because there is no spec for it. If you measure the rotor resistance, which can really only be done accurately with a Wheatstone bridge, you could use Ohm's Law and figure out a rough value, but that's far too much effort to expend.

Long story short, if the engine is running at speed and you put 12VDC to the fields and all is well, you should see at least 40-50 VAC output on a single (120V) winding. Depending on a lot of variables that voltage could be even higher, and often is.

If this is the case, everything from the brushes to the windings are in working order.

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Old 09-20-2012, 09:06:25 PM
len k len k is online now
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Default Re: voltage regulator question

It's not a Kohler, but for what it's worth, on an Onan 7NHM with electronic regulator the voltage to the rotor varies from 18 to 60VDC into a 20-25 ohm rotor.

On my Onan when I put 12VDC to rotor I got ~45V out the 120VAC leads (with 60 watt bulb).
And............when I put 24VDC to rotor I got ~100V out.
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