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Coleman Powermate low voltage
On Jun 23, 12:02*pm, Pumbaa wrote:
Hello, Forgive me if this post is Off Topic, I cannot seem to find any sort of generator newsgroup, I posted this on alt.rv but I have not had any responses... I have a Coleman Powermate 1850 MegaPulse Generator Model PM0401853 which I am trying to help my father-in-law fix. Unfortunatley I don't have any sort of tachometer to check the speed but it starts easy and sounds right and I really don't feel that there is anything wrong with the gas motor itself. So, I assume that my problem is in the generator side of things, it will only give me about 90 Volts @ 60HZ. *Because the Hz is right I assume that the RPM's are correct, so why am I only getting 90 Volts? If I manually overspeed the motor (and it really sounds like it is running too fast when I do this) I can get 120 Volts BUT the frequency is about 70 Hz (which again leads me to beleive that the engine speed is too fast). *This is frustrating because if I had a bad diode or a bad winding I would think it would not work at all. *But I cannot think of a reason that I would get low voltage at (what I assume to be) the correct RPM. Some research on the internet let me to un-solder the diodes on the rotor and according to my voltmeter they are okay. *What I need to know is what Ohm readings I should get on the rotor windings as well as on the different windings in the stator. *Also, according to my voltmeter the capacitor is okay. The only manual I can find for this generator on the internet is the owners manual. *Anyone with a techical manual for this generator perhaps you can help out... Thanks in advance * * * * * * * * * * * * * * Craig ** Follow UP** the folks at Powermate think it is a diode problem (unless I am using my voltmeter wrong, I already checked them). Try alt.energy.homepower many there know generators, but if its 60hz, rpm is probably correct at 3600. |
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