| Re: Next project - onan! [message #73712 is a reply to message #73689] |
Sat, 13 February 2010 11:04   |
 |
mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma:
|
Senior Member |
|
|
| Ken Burton wrote on Sat, 13 February 2010 01:31 |
Isn't there something about flashing it to get it started generating after it has sat stagnant for a long time? I have never done it.
|
Yes.
I have never done it either.
In relatively non-technical terms, this is how I understand it works: (Engineers might laugh, but I am a tech... this is how it works inside my head!)
You need a magnetic field to generate electricity. Big permanent magnets are not suitable for portable generators for many reasons so an electromagnet is used. A small amount of the OUTPUT of the generator is used to power this magnet. The compounding reactor is what taps this power. It sends an AC voltage to the Bridge Rectifier where it gets converted into a DC voltage. This DC voltage is applied to the field windings to create the electromagnetic field.
The thyrector in the compounding reactor works as a voltage regulator varying the strength of the magnetic field by varying the power being sent to the field windings. (It is my understanding thyrectors "never" go bad.)
I am sure you noticed that we are using the output to make something that we need to make the output!
Normally there should be enough residual magnetism to get the generator started putting out a low voltage to "feed back" into the field.
I am not sure of all the reasons why some generators loose this residual magnetism -- but if your genny looses it, you will need to "Feed the Baby." (Field to Battery) I have heard you run a wire from the positive side of the battery to the positive side of the field coil to power the electromagnet enough to get back "some" magnetism. I know it shouldn't take much....
BE SURE the wiring is good and not shorted before trying this...
It would also be good to get instructions from someone WHO HAS ACTUALLY DONE THIS! (Not just from me....)
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
