Low starting torque, low cogging and resistive torque Alternator!

[Mechamz Mz]

Hi, I'm currently doing a VAWT prototype.

I'm happened to find these 2 alternators, but not sure which is better?
http://www.ginlong.com/wind-turbine-pmg-pma-permanent-magnet-generator-alternator-GL-PMG-500A.htm
http://www.windbluepower.com/DC_540_Low_Wind_Permanent_Magnet_Alternator_p/dc-540.htm

the dimension of the Savonius turbine, height is 0.8m and width is 0.43m

My system require a low starting torque and low friction alternator. Previously, I've purchased one from http://energistar.com, but the performance was far from the information given.

I hope the alternator able to generate 12V and more than 1 or 2Ampere at low rpm, and low torque required. Any better suggestion than these 2 alternators are welcomed.

or something like this, http://www.gotwind.org/diy/Axial_Flux_Alternator.htm
(I'm looking someone customized it, I'm willing to pay for it)

Any idea??
Thanks!!

[Mark Ebert]

I would think you need to custom build a tiny alt for it.Something like this.

http://www.windstuffnow.com/main/3phase_turbine_kit.htm

[Mechamz Mz]

I want to buy a axial flux alternator, something like this
http://www.gotwind.org/diy/Axial_Flux_Alternator.htm

but where to buy? any idea??

I need a alternator for my VAWT prototype, 80cm x 45cm width
The alternator need to be low in starting torque and friction.

Thank you very much!!

[Mark Ebert]

Hi Mz
I beleive Ben's alt is a d.i.y project has is Ed's but his comes with all the parts and easy to follow directions.
If your planning on upscaling in the future i would'nt bother matching the load of the little prototype.Things change drastically has the swept area increases.
Just my opinion.Good luck and have fun:)

[Mechamz Mz]

who can help me do this alternator?? I'm willing to pay for it

[Rob Beckers]

Hi Mechamz,

To get back to your initial posting: I know a little bit about Ginlong's alternators, and by all accounts they make a quality product that is suitable for wind turbines (ie. low/no cogging). However, in your case you only need around 50 Watt maximum. Bolting on a large alternator such as the Ginlong you linked to will basically make your wind turbine fixed-RPM: As soon as cut-in is reached it'll (over)load the wind turbine and prevent the RPM from rising much if at all, regardless of wind speed. It'll be a poor match to your turbine. Most small wind turbine manufacturers make their own alternators.

Can't help you building an alternator. Why not do it yourself? Should be a fun little project. Of course, we'd like you to then post about the process, with pictures! ;)

-RoB-

[Dan Lenox]

Mechamz Mz,

Check into http://www.forcefieldmagnets.com/catalog/index.php?cPath=22_30, they sell components as well as a 'kit' version.

Dan Lenox

[Mark Ebert]

Where are you located Mechamz?

I've been thinkin of building smaller versions of my radial dual rotor for small turbines.

[Mechamz Mz]

Where are you located Mechamz?

I've been thinkin of building smaller versions of my radial dual rotor for small turbines.

hi, I'm from Singapore
you able to do it for me??