You are right Tony.
The magnetic field needed to produce the power comes from two places:
the alternator output and
residual magnetism of the field.
This is not perpetual motion, the crankshaft belt (fuel combustion
energy) is what allows the electrical output to be larger than the input.
Eric Schieb
On 6/26/2011 8:17 PM, Tony Cooper wrote:
Could someone enlighten me a little -
I thought alternators required external voltage (a battery) to
energize the field windings before it would produce electricity. No
battery and the alternator won't produce... and engine won't run.
Generators don't need the battery as they have physical magnet to
produce the field..
Is the above a true statement??
Tony
On 6/26/2011 7:37 PM, Lloyd Broussard wrote:
I wanted to pull the battery cable first to try to determine if it
was a battery or alternator issue.
I put a load on the engine and she died when I pulled the battery
cable. So at least I have a some proof that it's the alternator.
Thanks for all of the help!
Lloyd
-----Original Message-----
*From:* [email protected] [mailto:[email protected]]
*Sent:* Sunday, June 26, 2011 5:53 PM
*To:* [email protected]; [email protected]
*Subject:* Re: Checking alternator?
As you suspect the alternator is failing and will probably
replace it, why not remove it and take it to Autozone, Advance
Auto Parts, or some other parts store that can test its output at
different RPM ranges? If it turns out that it IS failing, you
can trade it for core charge at the store to reduce the price of
the new one.
Jerry AKA LGO
-----Original Message-----
From: Lloyd Broussard <[email protected]>
To: Miatapower <[email protected]>
Sent: Sun, Jun 26, 2011 3:52 pm
Subject: Checking alternator?
I think my alternator is going out. Will removing the negative cable while
the engine running tell me if it's putting out juice. I know this is really
old school, but it's a quick check.
The car is a '91 with a Link computer.
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