P
Physis 3
Guest
I'm looking at a Coleman 1850 watt generator. I'm sort of trying to backward engineer this thing in order to find the problem.
This is the design:
[1] 2 armeture coils.
[2] Coils are on either side of the armeture and shunted by two components. Ones either a capacitor or a MOV (I doubt it's a MOV, although it does look like one), the other looks like a diode but doesn't have a standard anode marking, so maybe it's a resister or something else but it's case looks like a silicon diode.
(I can't see the markings on these thins and I haven't removed these yet to get a better look because it wont be that easy and I'm douting that's where the problem is.)
[3] There are no brushes on the armeture.
[4] The iron cores of the armeture and the stator or field coils are either laminated or uncoated layers and are continuous around the circumferance in the case of the field or stator.
[5] There are three stator or field coils. One for the rectifier for 12 volts DC, one for 125 volts AC (?) and one that goes only to a 7.5 uf capacitor.
All the components check out OK. Although there is some kind of case damage on the capacitor and it doesn't seem to hold a charge long, The problem I'm having is understanding how you can expect to induce current in the absence of a magnetic field. As far as I can figure you'll either have to feed some power to some coils to "start" a magnetic field, and there's no means in the design to do that, or have some permanent magnets.
Lamenated or iron plates, in my experience, aren't used for permanent magnets.
I'm really baffled by this. At this point, all I can think is that it never should have worked in the first place. My best guess is that the permanent magnetic fields were lost but I wouldn't expect permanent fields from what's there. Or the 7.5 uf capacitor is damaged but those things don't make a magnetic field out of nothing. And the best I know is that I was the first guy to disassemble the thing.
This is the design:
[1] 2 armeture coils.
[2] Coils are on either side of the armeture and shunted by two components. Ones either a capacitor or a MOV (I doubt it's a MOV, although it does look like one), the other looks like a diode but doesn't have a standard anode marking, so maybe it's a resister or something else but it's case looks like a silicon diode.
(I can't see the markings on these thins and I haven't removed these yet to get a better look because it wont be that easy and I'm douting that's where the problem is.)
[3] There are no brushes on the armeture.
[4] The iron cores of the armeture and the stator or field coils are either laminated or uncoated layers and are continuous around the circumferance in the case of the field or stator.
[5] There are three stator or field coils. One for the rectifier for 12 volts DC, one for 125 volts AC (?) and one that goes only to a 7.5 uf capacitor.
All the components check out OK. Although there is some kind of case damage on the capacitor and it doesn't seem to hold a charge long, The problem I'm having is understanding how you can expect to induce current in the absence of a magnetic field. As far as I can figure you'll either have to feed some power to some coils to "start" a magnetic field, and there's no means in the design to do that, or have some permanent magnets.
Lamenated or iron plates, in my experience, aren't used for permanent magnets.
I'm really baffled by this. At this point, all I can think is that it never should have worked in the first place. My best guess is that the permanent magnetic fields were lost but I wouldn't expect permanent fields from what's there. Or the 7.5 uf capacitor is damaged but those things don't make a magnetic field out of nothing. And the best I know is that I was the first guy to disassemble the thing.
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