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60 watts at 110 rpm?

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gotwind2:
This is a Chinese built alternetor I believe - bare with me..

All is explained in this eBay advert along with videos (youtube), appologies for external links but neccesary.

http://tinyurl.com/yzt53e2
Hand cranked (100 rpm maybe) in the video powering a 50 watt bulb.

What's inside the thing to generate that kind of power at such low revs?

gotwind2:
I suspect someone will bin this.

However here is a direct video link to what I am enquiring about.

http://www.youtube.com/watch?v=q1lC9eN0u60&feature=player_embedded

dnix71:
Nothing, I suspect. That looks like a 12v halogen spot lamp. It's impossible to tell how much power the PMA is actually putting out at that speed by looking at the lamp.
The specs are incomplete/bogus, too. A 22mph wind means nothing. You need the torque/rpm curve to determine blade size in a "22mph wind" that will spin the PMA at the required rpm to make "500 watts." You might need a gear/step pulley to make the correct rpm.
And then there's 500 watts at ? what ? voltage. Low voltage will require expensive fat wire and higher voltages may require transformers or an mppt to make efficient power transfers to your load/battery bank. Is the output ac or dc? So many important questions unanswered.

FishbonzWV:
Ben,

I chuckle when I see people light a  bulb to show how much power is being produced. A bulb is a fixed resistive load. Battery charging is a different ball game.

It's probably wired in star.

My conversion, a 3/4 hp 4pole will do 22V @ 150 RPM In Wye. Delta is 12.8V @ 150 RPM.

If I had a halogen handy I would give mine a test.

Those are also on the US ebay.

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