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Forum Index : Windmills : Building a "BETTER" Chinese wind turbine

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wallablack

Senior Member

Joined: 10/08/2011
Location: Australia
Posts: 164

Posted: 07:08pm 04 Sep 2011

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I have been tinkering with turbines for a small time now and am in the planning stage of modifying my FD200W Chinese wind turbine.

Question:
What effect would replacing the standard magnets to Neodymium magnets have on the output of the turbine?

Ultimately I want to modify this turbine for low to medium wind conditions so any suggestions/advice on blade size etc etc would be taken in.

Cheers.

Foolproof systems do not take into account the ingenuity of fools.

VK4AYQ
Guru

Joined: 02/12/2009
Location: Australia
Posts: 2539

Posted: 12:03am 05 Sep 2011

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Hi Wallablack

The cost of fitting neo magnets may be more than the exercise is worth, I would suggest you look into the pricing first. If you do upgrade the magnets expect around 50% extra out put with slightly lower start RPM but you will get more cogging, I ran one of these mills for a while with a 72 inch three blade prop, it would exceed 400 watts as is but in winds around 8.5 MS cut in at 4 MS.

The design is for high speed and the only way it is going to work at low speed is with a step up drive and an 8 foot blade set.

All the best

Bob

Foolin Around

norcold

Guru

Joined: 06/02/2011
Location: Australia
Posts: 670

Posted: 08:39pm 05 Sep 2011

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Am assuming FD200W is same as the unit I have. They are rugged little beasts and with a cap-trebler are capable of 300w into a 48v system at around 25km(approx) winds. That is stock standard except for a lengthening of the tail by 350mm, balancing the blades and bending the furling back stop so as the tail is slighly out of square with the prop. This stops them furling to early and helps them track better. As Bob states believe they could achieve more with a 8foot blade set. Check out film`s al blades, they I believe with the cap-trebler will give you low wind performance. Details of the cap multiplier and film`s blades are on the forum. An alternative to the cap multiplier is Bob`s step up drive. Both will do the job, use the search machine in the forum and you`ll find heaps of info to help you.

We come from the land downunder.
Vic

anteror
Senior Member

Joined: 06/10/2009
Location: Finland
Posts: 189

Posted: 11:24am 12 Sep 2011

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This is worth reading, if you are goinh to make it better;

http://www.ecoinnovation.co.nz/pdf/Chinese%20Turbine%20-%20B rief.pdf

Antero

bobthebodger
Newbie

Joined: 05/02/2012
Location: United Kingdom
Posts: 1

Posted: 07:21pm 05 Feb 2012

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Hi all thanks for letting me join.
I have just fitted one of these Chinese turbines my model is a FD300B 24volts.
More to come.
Bob

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