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Polarizing

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Rob

04-24-2003 08:19:29




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OK> I am in the middle of a rewire of my 1950 sidemount 8n. I am gonna be replacing the Voltage regulator. Someone before me had grounded negative and I want to switch back to positive ground. As I understand it, all I have to do is hook up the battery the way it should be (positive ground) and spark the new voltage regulator bat. and arm. and I do this with the key off. Is this the right proccedure, and how/why does this work? Thanks in advance for all the help and input!---Rob

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souNdguy

04-24-2003 12:22:24




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 Re: Polarizing in reply to Rob, 04-24-2003 08:19:29  
Also.. check your ignition coil.. though, when it was changed to - grnd.. they mau not have even changed the coil.. so it might be right -again-.

Soundguy



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Dell (WA)

04-24-2003 09:04:54




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 Re: Polarizing in reply to Rob, 04-24-2003 08:19:29  
Rob..... ...yes, that is the correct "polarizing" proceedure for 8N 3-wire genny/4-wire V/R.

The reason it works is because of electromagnitizm. ibid...see theory of EMF.

All magnets have what is commonally called N & S poles, electomagnets too. Except electromagnet poles depend upon which way the Direct Current (battery) flows. When you "polarize" your genny, you magnitize your field poles for the way that your battery is hooked up. Then when the armature rotates thru the "field" it creates "correct" current flow which charges the battery.

The voltage regulator senses this charge from the genny and compares it to the battery charge and if the genny armature output is too much charge, the voltage regulator "turns off" the field magnet for just a moment then back on. Infact, the voltage regulator was often called a vibrating regulator.

And seriously, if you want to know more about generators and voltage regulators, go read a book..... ...respectfully, Dell

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bg

04-24-2003 08:48:53




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 Re: Polarizing in reply to Rob, 04-24-2003 08:19:29  
When the generator has been sitting , or has been dropped or has been wired differently, the residualmagnetism of the pole shoes is lost. Polarizing them restores the residual magnetism, which basically tells the current which direction to flow. You polarize as you mentioned, with everything wired and ready to go with the switch "OFF."



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Evil Steve

04-24-2003 08:52:01




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 Re: Re: Polarizing in reply to bg, 04-24-2003 08:48:53  
Couldn't have said it better.



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