Wanting to build a bigger turbine
By chinsettawong, Section Wind Posted on Sat Oct 08, 2005 at 02:43:39 AM MST
I'll have 40 pieces of 1.5" x 3" x 3/4" neo magnets just like what Dan B used for making his 3 KW turbine

I have just bought 40 pieces of 1.5" x 3" x 3/4" neo magnets just like what Dan B used for making his 3 KW turbine.  I live in a low wind area and am thinking of making a turbine similar to what Dan B. made. Dan B., if you were to build a new one, what would you change to make it better?  Since I'll have 40 pieces of magnets, should I use them all and make a 20 poles machine?  I don't mind making the blade a liitle bigger than yours.  Do you think a 6 meters blade be okay? Wachara C. Bangkok, Thailand

Wanting to build a bigger turbine | 10 comments (10 topical)

Re: Wanting to build a bigger turbine (3.00 / 0) (#1) by DanB on Sat Oct 08, 2005 at 07:20:12 AM MST

sounds exciting.  Ive been thinking of a project like that myself, I was thinking 20 magnets/rotor on 21" rotors would be fun.  I expect it could match a 20' blade.

Re: Wanting to build a bigger turbine (3.00 / 0) (#2) by chinsettawong on Sat Oct 08, 2005 at 07:56:24 AM MST

Thanks Dan for your reply.  I am thinking about the same.  What cut-in RPM do you think will be good for this 6 meters blade? Do you think I can expect to get around 400 to 500 watts in 3 to 4 m/s wind?   Wachara Chinsettawong Bangkok, Thailand [ Parent ]

Re: Wanting to build a bigger turbine (3.00 / 0) (#3) by Victor on Sat Oct 08, 2005 at 09:00:03 AM MST

The swept area of a 6 meter diameter is 28.3 meters^2 with a wind speed of  4 m/s the total energy in the wind is just over 1100 watts with 59.3% of that being the theoretical maximum that can be extracted (betz). If you do a good job on blade construction I would expect ~300 watts in 4 m/s. Victor [ Parent ]

Re: Wanting to build a bigger turbine (3.00 / 0) (#4) by windpower on Mon Oct 24, 2005 at 05:29:25 PM MST

Where did you buy your 1.5" x 3" x 3/4" neo magnets from?? I didn't see them in the store here??

Re: Wanting to build a bigger turbine (3.00 / 0) (#5) by chinsettawong on Wed Oct 26, 2005 at 08:51:19 PM MST

I ordered them from a Chinese company in China.  The price I got was reasonable.  Let me know if you want to buy. Wachara C. Bangkok, Thailand [ Parent ]

Re: Wanting to build a bigger turbine (3.00 / 0) (#6) by windpower on Thu Oct 27, 2005 at 01:30:29 PM MST

Yes, I would like to buy some.  Can you provide me with info on the company? [ Parent ]

Re: Wanting to build a bigger turbine (3.00 / 0) (#7) by chinsettawong on Thu Oct 27, 2005 at 11:19:07 PM MST

The company name is China Rare Earth Magnet Co.  I will be getting the magnets early next week.  Perhaps I should look at them first before I recommend them to you.   Anyway if you can't wait, their website is at www.permanentmagnet.com. [ Parent ]

Re: Wanting to build a bigger turbine (3.00 / 0) (#8) by windpower on Mon Oct 31, 2005 at 08:09:31 AM MST

I will wait until I hear back from you on the quality of these magnets. Please let us know what you think of them. [ Parent ]

Re: Wanting to build a bigger turbine (3.00 / 0) (#9) by chinsettawong on Mon Oct 31, 2005 at 09:04:00 PM MST

I received the magnets last Friday.  The overall quality is very good.  They come in 2 boxes with a lot of foams inside for protection.  I am satisfied. Wachara C. [ Parent ]

Re: Wanting to build a bigger turbine (3.00 / 0) (#10) by willib on Wed Nov 30, 2005 at 07:27:42 AM MST

awesome machine you have there..!!did you cut the magnets to that shape? how has it performed? Carpe Ventum (seize the wind) One needs faith in the future

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