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Home > Help Needed / General Tech Chat > Do alternators work in reverse?

Paul S

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As above, planning on using the alternator as an idler on the supercharger drive, but realy need the belt to run the other side of the pulley, hence it will run backwards.

I think that the rectification will sort it out, but wondered if anyone has tried it.

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Tazzy

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The rectification sorts it out. Same rules apply for (for instance) home audio gear.


Bat

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Bermingum

Hi,
Depends, some have offset brushes.
Don't forget to reverse the fan *wink*
Cheers,
Gavin :)

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danboy

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Asked the same question a while ago, looks like we are thinking along the same lines Axel.
Yes it will work OK.
Only difference is I was planning to drive the alternator off the rear of the M45.
Regards
Dave


robert

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uranus

try driving in reverse and see if the battery goes flat ?

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danboy

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Connect the battery the other way round then, no problem then Eh!?
Regards
Dave


G13B

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it works just fine have it on my motor

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rubicon

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On 2nd of Oct, 2007 at 06:31pm robert said:
try driving in reverse and see if the battery goes flat ?


lol

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Richie

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i thought alternators had a diode in em so if it was put on in reverse you would get no charge and the battery light would stay illuminated on the dash ? iam tired just finished nightshift so if this sounds like bollox then i appologise



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wil_h

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On 3rd of Oct, 2007 at 07:39am Richie said:
i thought alternators had a diode in em so if it was put on in reverse you would get no charge and the battery light would stay illuminated on the dash ? iam tired just finished nightshift so if this sounds like bollox then i appologise


Appology acepted.

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Rob H

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On 2nd of Oct, 2007 at 05:58pm Bat said:

Don't forget to reverse the fan *wink*


How do you do that?

If you just turn it around it'll still blow in the same direction, just not as efficiently.

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Paul S

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On 3rd of Oct, 2007 at 08:21am Rob H said:
On 2nd of Oct, 2007 at 05:58pm Bat said:

Don't forget to reverse the fan *wink*


How do you do that?

If you just turn it around it'll still blow in the same direction, just not as efficiently.


That's what I thought, but did not want to embarrass anybody.

Rob, did you go to the Tom Fenton school of Tact?


Thanks for the help guys.

Would it be right to assume that the Nippon Denso alternators would also work in reverse?

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."


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On 3rd of Oct, 2007 at 10:19am Axel said:

Rob, did you go to the Tom Fenton school of Tact?


I don't know what you mean Paul.


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Bat

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Hi,
Well I don't think you can reverse the fan, I guess I should have put that you'll need to change the fan as the standard one won't work correctly as you will be spinning it the wrong way.
As you can see that takes a lot more typing....
The Nippons may well have offset brushes...
Cheers,
Gavin :)

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