Low Starting Torque, Low Friction Alternator!

[mechamz]

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

Any idea??

[electrondady1]

hello mechams,

your savonius is .43x.8=.34 sq.m.swept area.

because of the design it is actually harvesting energy from only 1/2 that.

so .17sq.m.

you are trying to capture a percentage of the winds energy

contained in a space the size of a piece or writing paper.

(32%(savonius) of 60%(betz limit) of the actual wind energy)

there is no magic involved.

the  alternators you have suggested are much to large for the devise you have built.