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what electric motor has the least amount of drag and can be used to generate 15 watts at 200 rpm @ 12volt? Answered

I am building a mini wind turbine and im sourcing a generator (not a diy one) that produces 15 watts at 12 volts @ 200 rpm? any ideas?

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steveastrouk

Best Answer 9 years ago

Your problem is going to be that unless you gear it, you'll need a gear or belt speed up. 200RPM and 12V is likely to need a 20:1 step up for a 12V motor, or 10:1 for a 24V motor etc, since "base speed", the motor's rated speed is likely to be ~4000 RPM, if not higher

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Burnrsteveastrouk

Answer 9 years ago

thanx for your input on this. i will keep yhis in mind as i progress in my design.

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brokengun

9 years ago

Hard to say for that. I don't think it is very well documented how well electric motors perform as generators. You're best bet is to just try a few. Get some motors from a tape drive or something that looks like it might be the size you want. Is you only want 15 watts you might be able to get a higher rpm then 200.

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Burnrbrokengun

Answer 9 years ago

Will try. it seems finding a suitable generator/dynamo is the hardest part of the whole thing.

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ANDY!

9 years ago

howbout a 15watt solar panel?

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BurnrANDY!

Answer 9 years ago

The problem with a solar panel is that it wont work for this application. but i use solar panels for other things i plan to do instructables on a few of them.But thanx 4 your input

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Sandisk1duo

9 years ago

get a used DC electric motor