SailNet Community - View Single Post - Depolarized VP2030 alternator?
View Single Post
Old 10-09-2013
bfloyd4445's Avatar
bfloyd4445 bfloyd4445 is offline
Senior Member
Join Date: Sep 2013
Posts: 382
Thanks: 8
Thanked 5 Times in 5 Posts
Rep Power: 2
bfloyd4445 is on a distinguished road
Re: Depolarized VP2030 alternator?

Originally Posted by hellosailor View Post
Must be a translation problem. One doesn't "polarize" an alternator. An alternator has no inherent polarity until the regulator gets added into the wiring, and then the polarity is fixed and permanent, based on the construction of the regulator. There's no way a mechanic can change that, or "re-polarize" or "un-polarize" it.

I'm guessing a VP2030 is a Volvo Penta engine, but that doesn't tell us what kind of alternator they bolted onto it, or what kind of regulator is being used.
my initial thought was the same as yours. But it seems to me years ago I ran into a situation in which the soft iron core became magnetized by high voltage spike so that it was canceling part of the electromagnetic force resulting in an alternator that seemed fine but had low output. the fix was to demagnetize the cores. maybe that's what he meant by polarizing/?
Reply With Quote Share with Facebook