I disagree, too polarize a generator you flash the field i.e. , wire momentarily from battery to field. Jim N87349 A&P -----Original Message----- From: [EMAIL PROTECTED] <[EMAIL PROTECTED]> To: Ercoupe Mailing List <[EMAIL PROTECTED]> Date: Thursday, November 18, 1999 9:24 PM Subject: Re: generator polarization
I believe the explanation given below is incorrect and can
DAMAGE the REGULATOR. DO NOT DO THIS! In most regulators,
connecting the Field terminal to battery voltage or ground
can fry components in the regulator. What Dave was possibly
thinking about is that if the regulator is suspected of
being bad, the Field lead should be REMOVED from the
regulator and connected to ground (the airframe). This will
cause the generator to put out maximum - if the battery
charges under this condition, the generator is OK.
As for "polarizing" the generator, this is a very rarely
needed operation. It is required if the generator loses all
its magnetization, as it might if not operated for a year or
two. To polarize a generator, it is necessary to BRIEFLY and
CAREFULLY (safety glasses recommended) connect the generator
ARMATURE terminal to the battery positive voltage - this can
be accomplished by turning on the master switch and jumping
the regulator BATT terminal to the ARMATURE terminal. This
will cause sparks! Just a touch of a heavy gauge wire will
do the job.
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Alon A-2 () ()
s/n A35
N6359V
based at RHV - San Jose, CA chief pilot: David Smoler
Dave Marshall wrote:
>
> M. J. Fealy wrote:
> >
> > Hi all;
> >
> > My C-T 85F is equipped with a Delco Rmey generator.
> >
> > Does anyone know about polarization of this equipment? If so, why and
> > how is it done?
> >
> > Thanks
> >
> > Mike
> > 514-C N93929
> > Beeville, TX
>
> Mike,
> Back in the pre-alternator automotive days, new generators were
> polarized by momentarily touching a wire from the field terminal on the
> generator to the (+) battery terminal. This was done after the
> generator was installed and connected. This weakly magnetized the core
> laminations so the generator would be self-exciting. Once the generator
> was producing current, the voltage regulator would take over. I don't
> remember if the field wire from the regulator was connected or not
> during the polarization process. I would leave it off initially, and
> connect it after the generator has been polarized. This was a common
> practice with new generators so any older mechanic should be familiar
> with the procedure. Hope this helps.
> Dave in Alamogordo, NM
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