## Need to know relation between turns, poles and rpm

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• I am trying to do a DIY project of 1KW 3 phase permanent magnet alternator suitable. I think of around 1 feet dia stator with rotors having PMs on its both
Message 1 of 4 , Jan 30, 2009
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I am trying to do a DIY project of 1KW 3 phase permanent magnet
alternator suitable. I think of around 1 feet dia stator with rotors
having PMs on its both ends.
I need guidance regarding
1] No. of electrical poles to be maintained on stator
2] Total no. of coils per phase and no. of turns, wire size for each
coil.
3] No. of magnets on rotor wheel

Also can I get mathematical relation between no. of poles, no. of
turns, rpm to the output of alternator.
• 12 magnets on each plate, 9 coils sandwiched in between. We use N50 magnets, 2 x 1 x .5 What voltage are you trying to produce? Steve Spence
Message 2 of 4 , Jan 30, 2009
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12 magnets on each plate, 9 coils sandwiched in between. We use N50
magnets, 2" x 1" x .5"

What voltage are you trying to produce?

Steve Spence
http://www.green-trust.org
http://www.buildittogether.info

sanat wrote:
>
>
> I am trying to do a DIY project of 1KW 3 phase permanent magnet
> alternator suitable. I think of around 1 feet dia stator with rotors
> having PMs on its both ends.
> I need guidance regarding
> 1] No. of electrical poles to be maintained on stator
> 2] Total no. of coils per phase and no. of turns, wire size for each
> coil.
> 3] No. of magnets on rotor wheel
>
> Also can I get mathematical relation between no. of poles, no. of
> turns, rpm to the output of alternator.
>
>
• the formula is 1.33 (magnet) x no. of coils ... From: Steve Spence Subject: Re: [axialflux] Need to know relation between turns,
Message 3 of 4 , Jan 30, 2009
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 the formula is 1.33 (magnet) x no. of coils --- On Fri, 1/30/09, Steve Spence wrote:From: Steve Spence Subject: Re: [axialflux] Need to know relation between turns, poles and rpmTo: axialflux@yahoogroups.comDate: Friday, January 30, 2009, 7:52 AM12 magnets on each plate, 9 coils sandwiched in between. We use N50 magnets, 2" x 1" x .5" What voltage are you trying to produce? Steve Spence http://www.green- trust.org http://www.builditt ogether.info sanat wrote: > > > I am trying to do a DIY project of 1KW 3 phase permanent magnet > alternator suitable. I think of around 1 feet dia stator with rotors > having PMs on its both ends. > I need guidance regarding > 1] No. of electrical poles to be maintained on stator > 2] Total no. of coils per phase and no. of turns, wire size for each > coil. > 3] No. of magnets on rotor wheel > > Also can I get mathematical relation between no. of poles, no. of > turns, rpm to the output of alternator. > >

• Can you further explain that with an example? Steve Spence http://www.green-trust.org http://www.buildittogether.info
Message 4 of 4 , Jan 31, 2009
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Can you further explain that with an example?

Steve Spence
http://www.green-trust.org
http://www.buildittogether.info

doug duncan wrote:
>
>
> the formula is 1.33 (magnet) x no. of coils
>
> --- On *Fri, 1/30/09, Steve Spence /<sspence@...>/* wrote:
>
> From: Steve Spence <sspence@...>
> Subject: Re: [axialflux] Need to know relation between turns, poles
> and rpm
> To: axialflux@yahoogroups.com
> Date: Friday, January 30, 2009, 7:52 AM
>
> 12 magnets on each plate, 9 coils sandwiched in between. We use N50
> magnets, 2" x 1" x .5"
>
> What voltage are you trying to produce?
>
> Steve Spence
> http://www.green- trust.org <http://www.green-trust.org>
> http://www.builditt ogether.info <http://www.buildittogether.info>
>
> sanat wrote:
> >
> >
> > I am trying to do a DIY project of 1KW 3 phase permanent magnet
> > alternator suitable. I think of around 1 feet dia stator with rotors
> > having PMs on its both ends.
> > I need guidance regarding
> > 1] No. of electrical poles to be maintained on stator
> > 2] Total no. of coils per phase and no. of turns, wire size for each
> > coil.
> > 3] No. of magnets on rotor wheel
> >
> > Also can I get mathematical relation between no. of poles, no. of
> > turns, rpm to the output of alternator.
> >
> >
>
>
>
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