How does this generator work ?

[Externet]

With the gasoline engine running the yellow wires are your excitation, measure across the yellow wires.

I know you have checked this but is the circuit breaker tripped?

Ron

Generator section is defunct. Its fan shattered and destroyed stator and rotor windings.

 

[Reloadron]

Generator section is defunct. Its fan shattered and destroyed stator and rotor windings.

So it's beyond economical repair?

I have an old Coleman Powermate 4000 going back maybe 30 years. That old generator saved me several times when my whole house unit failed. Briggs & Stratton 8 HP engine and your 2500 should be an 5 HP engine. Just a stator cost more than the unit new.

Ron

 

[Externet]

Well beyond economical repair. Unobtanium parts at robbery prices if found; and rewinding would be 10 times the cost. So am lurking for an used one to canibalize for parts... Its B&S engine surprisingly reliable, starting always at first pull...
But in curiosity, how is the rotor (field) energized ? Stator feeds the outlets and one capacitor.

Checked for any remnant magnetism and found nothing in the cores. Automotive alternators do have a 'steely' portion of the iron rotor that initiates generation. My strictly guess is the stator induced something towards the rotor but no evidence.

 

[debe]

This is a circuit of a typical generator that you have. The output voltage is controled by the capacitor. Dfiferent values give different voltages, as also does diff

erent engine RPM. If the capacitor is open circuit you get no output voltage.

 

[gary350]

I was given 2 generators that don't work. I took them apart to see if they can be fixed but I came to a place where it could no longer be dissembled without destroying the generator. I found a YouTube video that says, the generator only produces a tiny amount of power until something is plugged into the generator that needs more power. The detector circuit tells the generator to produce more power, if PC board goes bad it no longer tells the generator to produce more power. Look on YouTube there is a good video. The new generation of generators are DC with an AC converter. I forget the correct name?

 

[debe]

The generator you refer to are Inverter generators & are nothing like the generator originaly posted.

 

[Externet]

This is a circuit of a typical generator that you have. The output voltage is controled by the capacitor. Dfiferent values give different voltages, as also does diffView attachment 147818erent engine RPM. If the capacitor is open circuit you get no output voltage.

EXTRAORDINARY FINDING ! Thanks, debe !
Mine has no DC generation section; and did not find FC - D1 but could be hidden tied under insulation winding layers.

Outlet being 120VAC or 240VAC makes not much of difference in the working principle.

Perhaps some day I will learn the mystery of the brushless field excitation ... Faint earth's magnetic field acting on the cores ???

 

[Externet]

I was given 2 of those generators that don't work. I took them apart to see if they can be fixed but I came to a place where it could no longer be dissembled without destroying the generator. I found a YouTube video that says, the generator only produces a tiny amount of power until something is plugged into the generator that needs more power. The detector circuit tells the generator to produce more power, if PC board goes bad it no longer tells the generator to produce more power. Look on YouTube there is a good video. The new generation of generators are DC with an AC converter. I forget the correct name?

Where are you ? Zip code ? If am lucky I could buy parts from you. Thanks.

 

[schmitt trigger]

The secret is that you have a small generator, called the exciter, which rotates with the main generator's rotor field.

 

[debe]

This is the style of parts, same as the orig poster. Showing were D1 is on this rotor & there is a small magnet on both poles for initial exciting.

 

[Externet]

This the defunct rotor after its fan shattered and destroyed the windings... Has diodes hidden in plastic crevices but no magnetism at all.

 

[debe]

Certainly wrecked that.

 

[ZipZapOuch]

This the defunct rotor after its fan shattered and destroyed the windings... Has diodes hidden in plastic crevices but no magnetism at all.

View attachment 147834

Put in the effort