fusible link questions

[Greg Hermann]

>You are correct that the speed of the moon roof motor would vary with engine
>speed, but that wouldn't be much of a concern with a moon roof. I don't
>think the frequency at 3600 RPM would be 60 HZ. I'm not sure of the exact
>number of poles in the stator It might
>be 12 and the rotor had a different number like 7. I would venture to say
>the AC frequency would be in the vacinity of 100 to 400
>HZ. that would vary with engine speed.  Take Care
>                                                                         Don

Thought I said ALTENATOR  RPM--with a typical pulley ratio that would give
you 60 HZ at about 1000 ENGINE rpm--- Most alternators I have seen have six
coils in the stator--for a three phase machine, coils/#of phases give the
number of poles, so 2 poles it would be, and 3600 rpm on the alternator=60
Hz. If you got 12 coils, thazza 4 pole machine, and you would git 60 Hz @
1800 machine rpm, ad infinitum.

Regards, Greg
>
>
>
>> -----Original Message-----
>> From:	bearbvd at sni.net [SMTP:bearbvd at sni.net]
>> Sent:	Saturday, February 06, 1999 7:40 PM
>> To:	diy_efi at efi332.eng.ohio-state.edu
>> Subject:	RE: fusible link questions
>>
>> >I have worked on a few of the 2 alternator Fords (1977era) . The shop
>> manual
>> >shows one alternator for the moon roof and windshield de-icer. And one
>> >alternator for the 12 volt systems. The one alternator is indeed 110
>> volts
>> >but at 400 cycles 3 phase AC. It looks like all they did is leave off the
>> >diodes and full field the rotor. The people I talked to said they seldom
>> >failed. The windshield had 3 heating elements wired in a star
>> configuration
>> >and the moon roof was a 3 phase motor star wound. To close  the moon roof
>> 2
>> >phases were
>> >flopped just like a regular 3 phase motor.                   Don
>>
>> Makes perfect sence, except that the frequency of the AC produced would
>> have varied with engine speed. Alternators are wound like a two pole
>> motor,
>> so 3600 ALTERNATOR rpm would have given 60 cycle AC.
>>
>> Regards, Greg
>> >
>> >
>> >> -----Original Message-----
>> >> From:	David A. Cooley [SMTP:n5xmt at bellsouth.net]
>> >> Sent:	Saturday, February 06, 1999 3:21 PM
>> >> To:	diy_efi at efi332.eng.ohio-state.edu
>> >> Subject:	Re: fusible link questions
>> >>
>> >> At 12:45 PM 2/6/99 -0800, you wrote:
>> >>
>> >> >> >
>> >> >Ford used 2 alternators on some Lincolns; one was 110 volts and used
>> for
>> >> >the rear window heater. What did they change in the alternator to do
>> >> this?
>> >> >
>> >>
>> >> Just the wiring...
>> >> You can buy a box that hooks up to the alternator on most cars that
>> >> provides 110VAC for running power tools remotely, while still charging
>> the
>> >> battery.
>> >>
>> >> ===========================================================
>> >>            David Cooley N5XMT           Internet: N5XMT at bellsouth.net
>> >>      Packet: N5XMT at KQ4LO.#INT.NC.USA.NA   T.A.P.R. Member #7068
>> >>        I am Pentium of Borg...division is futile...you will be
>> >> approximated.
>> >> ===========================================================
>>