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

 

[Rod in Forfar]

I looked at Generac and Cummings for a standby home power supply, but in a cold climate the propane engines are prone to problems starting, I read of Generacs with carb trouble running up to 70 hz, and I don't want the thing on my lawn. Instead I have purchased an Eco Ultra 7 kw battery pack, the current best seller. I hope to power it with 110 current for charging from Ontario Hydro. My current backup is a Baumalight 7.5 kw on an 18 hp tractor. It has worked well delivering 30 amps by cable to a generator panel in the house. I am worried about the shape of the sine wave going into the Ultra, lest I fry something, even though I can operate it at 60 hz within a small margin. Any suggestions on how to evaluate the output of the generator?

Thanks,
Rod Croskery
The Croskery Woodlot

 

[Tony Stewart]

When I went to Armenia this fall, all of the taxis use LPG and the LPG stations look like a Las Vegas night club with all the lights. Some older cars use gasoline or petrol to start in winter and then switch to LPG upon starting but I never saw any. LPG was half the price . I am surprised it hasn't caught on over here in Toronto.

 

[Nigel Goodwin]

When I went to Armenia this fall, all of the taxis use LPG and the LPG stations look like a Las Vegas night club with all the lights. Some older cars use gasoline or petrol to start in winter and then switch to LPG upon starting but I never saw any. LPG was half the price . I am surprised it hasn't caught on over here in Toronto.

It requires modifying the vehicles, and losing considerable boot space fitting a LPG tank, as well as keeping your petrol tank. There's been a small amount of conversions done in the UK, but it never took off, and filling stations are fairly rare - so you need to keep the petrol option.

An old friend of mine (Terry) used to work at a place doing the conversions at one time.

As kids we used to knock on various farms, often playing with old motorbikes and cars - and the one I spent most time at had two tractors, one was a 'relatively' new one which ran on diesel, the other was an OLD one which ran on petrol/TVO (Tractor Vapourising Oil) - TVO was basically low quality paraffin. The farmer had two large tanks on the farm, one for Diesel and one for TVO. You started the tractor on Petrol, then when it was warm you switched it to TVO - you couldn't start from cold on TVO.

Now we were poor skint kids, and struggled buying petrol, so in the old motorbikes we often used to mix a bit of TVO in to make it go further. Then once we acquired a Ford Popular (sit up and beg) Pickup we added two motorbike tanks in the back, filled one with Petrol (which we had to go out and buy), and one with TVO (which we took from the unlocked TVO tank ). Then, just like the tractor, we started on petrol then switched to TVO once it was warm.

 

[Externet]

Hi. That video is not pertinent to the brushless generator subject of this thread ( how does it work with no brushes and no remanent magnetism ?) and obviously you did not see post #31. Stator has similar destruction... ---> cadaver.

 

[Tony Stewart]

Time for a new generator? https://www.aliexpress.com/item/1005007464107148.html
240V maybe optional 120V if you ask

 

[schmitt trigger]

Time for a new generator? https://www.aliexpress.com/item/1005007464107148.html
240V maybe optional 120V if you ask

Wow!
A 3.6 kW inverter generator for a little over US$500.

 

[Externet]

Well, that is actually 2000 W constant power, I would gladly prefer go another route; no carburetors, no magnetos, no oils, no spark plugs, no gasoline, no nuts&bolts, no pulling cords for never starting when needed :

----> https://www.temu.com/goods.html?_bg..._1734987954043_djlbly413s&refer_page_sn=10037

It is in my shopping cart unless I find a parts donor for my defunct gasoline powered. Would take buying a couple of 12V car batteries additionally.