I bought this DC motor

Anything about construction that doesn't fit into any of the above

Re: I bought this DC motor

Postby apicella on Mon Dec 01, 2008 7:43 pm

So do you think a 2 to 1 ratio will be OK or should I go for more.
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Re: I bought this DC motor

Postby windgat on Mon Dec 01, 2008 8:52 pm

Using the circumference of your blades, work out the tip speed at 500rpm. E.g. 1m radius = 6.28m. 500rpm = 3142m/min = 52m/s. That's moving quite fast! How big were you planning to make the blades? My guess would be at least 3:1 ratio, but that is not based on more than intuition, and blade size is a big factor.
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Re: I bought this DC motor

Postby apicella on Tue Dec 02, 2008 8:16 am

I know that vertical axis is not your field but I would like to build a vertical axis turbine because of the area I live in and position as to were I can erect my turbine. So considering that should I use 3 to 1 or maybe evn go 4 to 1.
What do you think.
The turbine is 120m heigh and diameter 90cm.
your help is much appreciated.
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Re: I bought this DC motor

Postby windgat on Tue Dec 02, 2008 11:08 pm

I would say main thing is to make it adjustable. So try and design so that different size pulleys can be put on with too much hassle, anything from 2:1 to 5:1. they you can experiment to find the best for the wind speed in your area. Too high and it won;t turn, too low and you will need a lot of wind to get any power.

Will you use a fan belt as the drive?
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Re: I bought this DC motor

Postby apicella on Thu Dec 04, 2008 1:17 pm

I'm going 4 to 1 and we will see what happens.
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Re: I bought this DC motor

Postby amarvird on Thu Oct 01, 2009 1:24 pm

Hey I have a question, I have to make a mini wind generator as a 1 year long project that has a huge impact on my grade. Right now my ideas on making the wind generator is to have a small electric DC motor, connect propellers to the front of the DC motor so that when the propellers spin I would generate electricity. Can I do this by adding a diode in between the voltmeter and the DC motor?
Thanks :)
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Re: I bought this DC motor

Postby windgat on Thu Oct 01, 2009 9:58 pm

Yes you can do what you describe - except for the diode. A DC motor will make DC when you turn it, so no need for the diode in that way.

A diode would be used if you use a battery - then you dont want to use the battery to turn the motor when there is no wind, so you use a diode to prevent current flowing into the motor.

If you are not after much current, a stepper motor from an old floppy drive or CD drive might work.

Let us know how it goes!
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Re: I bought this DC motor

Postby Garrick on Thu Mar 11, 2010 11:52 am

Hi Leon,

Where did you buy this motor? Im also looking for one!!
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