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Recipe Book pdf available now
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6 watt turbine design from Adriaan Kragten
Diameter D = 1.04 m
Number of blades B = 3
Design tip speed ratio ld = 3.5
Mass including 1 m tower pipe m = 4.85 kg
Starting wind speed Vstart = 2.6 m/s
Survival wind speed Vsurv = 30 m/s
Cut in wind speed (if started) Vcut in = 2 m/s
Rated wind speed Vrated = 8 m/s
Nominal voltage 12 V DC
Power at rated wind speed P = 6 W
In this manual the 3-bladed VIRYA-1.04, electricity generating windmill, is described. The generator of this windmill is made of a Shimano Nexus hub dynamo type DH-2R40 or another type with similar flange dimensions. It is expected that, together with the detailed drawings, the windmill can be manufactured in a simple workshop.
For more details see the web page of
Adriaan Kragten, B. Sc.
Kragten Design
Populierenlaan 51, 5492 SG Sint-Oedenrode, The Netherlands
Telephone: + 31 413 475770
http://www.bidnetwork.org/en/member/adriaankragten
and download the pdf file manual_virya-1.04_may_2013.pdf
thanks Adriaan!
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A chance to work with Adriaan Kragten on a pumping application for small wind
Here is an invitation from Adriann Kragten to test his design ideas and develop a pumping wind turbine project. Please note that Adriaan has never built an axial flux generator, so these instructions are not like my Recipes which are based on decades of experience, but the document is very rigorous and mathematical, and covers every theoretical detail. Adriaan has a designed many successful wind turbines based on induction motors as can be seen on his site. This is a great opportunity to work with an expert.
Adriann writes:
“Up to now, 17 public KD reports about different aspects of small windmills can be copied for free from my page on the website of Bidnetwork: http://www.bidnetwork.org/en/member/adriaankragten. The most recent report is KD 531: “Ideas about a 16-pole, 3-phase axial flux permanent magnet generator for the VIRYA-3D2 windmill using 16 neodymium magnets size 50 * 15 * 15 mm”.
In KD 531, a new idea is described how water can be pumped by a windmill. The windmill has a multi pole direct drive axial flux PM-generator and a fast running steel rotor with only two blades. The pump has a standard 3-phase asynchronous motor. For the VIRYA-3D2, the windmill has a 16-pole generator and the pump has a 0.75 kW motor. The same idea is described in report KD 529 for the bigger VIRYA-3.9 windmill which has a 22-pole generator and is meant for a pump with a 1.1 kW pump motor.
Although the multi pole generator is specially designed for connection to the 3-phase motor of a centrifugal pump, it can also be used for battery charging if it is provided with a low voltage winding and if the 3-phase current is rectified.
Public report KD 490: “Water pumping with a windmill” has been modified such that this new idea is now incorporated in chapter 5.
At this moment I have no intention to build and test a windmill with a multi-pole axial flux generator but I will support someone who is willing to test this new idea of water pumping.
Adriaan Kragten
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Test report for Recipe 3.6 metre turbine
Rapport SEPEN 32.6 – Eolienne autoconstruite Piggot – 1.7 kW – Reseau
Above is a link to the full test report in French of a Recipe style 3.6 metre diameter grid connected wind turbine, built by Tripalium.
I can understand a bit of French, but I mostly look at the pictures, which I like because they show it producing a bit more energy than my predictions in the Recipe Book.
I put this international chart in for your info… it’s not part of the test report! (Hugh)
This is a high budget test site, and it is a privilege to have had such a test conducted on one of my designs. Thanks to Jay Hudnall of Ti’eole for doing this!
Here is a link to a video I made with Jay and a similar wind turbine in France.
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Newsletter from Tripalium in France
Tripalium newsflash:
goodbye 2013, hello 2014
Tripalium held 17 training courses in 2013. One of the highlights of the year was Hugh’s
visit in May followed by the annual meet-up of the thirty odd people who make up
Tripalium. A maintenance guide has been completed and progress is ongoing on a new
version of the manual modified to be more adapted to the French audience.
2013 also went out with a storm, Hurricane Dirk managed to bend one tower, throw-off
one tail, and overload a grid-tied regulator. The bent tower was attributed to the upper
guy wires not being tight enough; the tail was most likely caused by a light disequilibration
of the blades; as for the regulator, we are asking SMA to replace it under
warranty. Not a great way to start 2014.
For 2014, the new manual is nearing the finish, even if correcting the last details will
probably take several months. The wireframe for a new website has been done, so a
new website should be online before the summer. Also this spring, using the new
maintenance guide as a model, we are planning to do our first e-learning video. If this
works well, perhaps we will try to capture some of the steps of building a turbine on
video with clear explanations to each step. And not to forget there are already six
training course dates fixed for 2014.
www.tripalium.org
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New edition of the French recipe book
Tripalium have completed the update of their “Manuel” for wind turbine construction (which is the French translation of my recipe book). This is much improved on the older 2009 edition, with a lot of new material especially in the areas of tower construction and grid connection. The 1.2 metre turbine is separated from the others to reduce confusion. It’s a very nice piece of work, and I am honoured to have my name on it.
Tripalium teach on average 15-20 courses per year, with an installed base of over 120
turbines, 25 of which are grid connected.
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2014 English Units Recipe Book available as ebook
My Wind Turbine Recipe Book comes in two editions: Metric and “English Units” (also known as “Inches” or “North American” edition). I had to publish the English units edition because the 46x30x10mm magnets, and the metric wire sizes that I normally use are not available in the USA. In America generally you will find that Inches prevail, and also the rather limited range of AWG wire sizes. The English Units edition is based on 2″ x 1″ x 1/2″ neo magnets.
The English units edition is not a simple conversion of the sizes into inches and AWG etc. It is a subtly different set of designs that works with these subtly different magnet and wire sizes. My advice is not to mix the two books although the result will kind of work if you do. Choose one system and follow the recipe for that.
Up to now the English Units edition has only been available in hard copy direct from me and from other outlets in America. Now for the first time I have published it (in fully updated form for 2014) as an ebook (epub and mobi files etc) via Smashwords. In due course it will appear at all ebook stores, Amazon Kindle, Apple, Kobo, scribd, etc… For now you can buy it directly from Smashwords, here.
The $9.99 cost is a little higher than the cost of the 2010 kindle metric edition, but for North American readers I would say it is well worth the difference. Similarly the 2013 metric edition is a better idea than the older 2010 Kindle one, although this 2013 is only available in pdf for now.
| Book title | Hard copy | ebook |
| Wind Turbine Recipe Metric | 2013 | 2013 pdf |
| Wind Turbine Recipe Inches | 2012 | 2014 all |
| 2F construction manual | 2014 all | |
| Windpower Workshop | 2011 | |
| Scrapyard Windpower Realities (classic) | 1992 all |
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Hungarian translation of the Recipe Book
The Hungarian Translation is now available on Scribd as a pdf file.
For other translations and ebooks see this link.
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Ferrite magnet wind turbine plans books printed out
2F Wind Turbine Construction Manual
My new plans for making a 2 metre diameter wind turbine using the more durable ferrite magnets are now available in hard copy form by post from me. It’s the same as the ebook version but printed in 2 columns in a 52 page book.
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New edition of metric Recipe Book as Scribd PDF file
This will probably be the final edition of my Recipe Book, first published in 2009. Minor changes since last year’s edition and significantly better than the first ebook 2010 edition.
This was removed by scribd for a few days because they thought it was in breach of copyright because they already have the 2013 edition, but I sorted that out now.
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3 new KD-reports
Adriaan has notified me of the following free reports that he has published (see below the diagram). The axial flux design is a single disk with steel core in the coils, so the iron losses are pretty high (22 watts measured for an 80 watt turbine). The advantage (compared to the hollow-cored coils that I use) is a higher flux density in relation to the cost of the magnets used. The magnet gluing is a potential failure point at high rpm. I have some concerns about the use of thin metal plate in the support of the blades (fatigue). These are meticulously mathematical reports which will be invaluable to the diligent student. The theoretical work is a great lesson.
Dear Hugh and others
Recently I have placed three new KD-reports, a manual and a new list of public KD-reports on my page of the website of Bidnetword: www.bidnetwork.org/en/member/adriaankragten This material can be copied for free by anybody.
KD 571 gives the description and measurements of an 8-pole, 3-phase axial flux permanent magnet generator and the calculations of the rotor and the head of the VIRYA-1.36 windmill. Manufacture of the parts and a complete set of drawings of this windmill are given in a separate manual.
KD 574 gives the description and measurements of a 6-pole, 2-phase axial flux permanent magnet generator and the calculations of the rotor of the VIRYA-1 windmill. This report also contains the drawings of the generator and the rotor. This generator is an alternative for the Nexus hub dynamo of the VIRYA-1.04 windmill which is described in an earlier public manual.
KD 340 is an older report in which rectification of the generators of the VIRYA-windmills is described. Recently a chapter about 2-phase rectification is added because this is used for the VIRYA-1 generator.
In the list of KD-reports, all public KD-reports are given. 24 KD-reports and two manuals can now be copied for free from my page on the website of Bidnetwork. I am retired now for almost three years and I no longer accept large engineering projects but through these free KD-reports I try to make that the knowledge gained by 40 years of experience with small windmills is not lost. Questions about small windmills asked by people from developing countries will be answered for free if answering takes a limited time.
Adriaan Kragten
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free KD-reports
Adriaan Kragten writes:
As I am retired for some years now, I no longer need income from selling my KD-reports about small wind turbines. So I have decided that from now on all my public KD-reports can be copied for free by anybody. This concerns ten more reports with former prices in between € 20 and € 40. My most important report is certainly KD 35: Rotor design and matching for horizontal axis wind turbines. Report KD 196 gives questions and answers about each chapter of KD 35 in English and in Dutch. A list of all 46 free public KD-reports is given as the first item of the menu KD-reports on my website: www.kdwindturbines.nl. All reports have a rather long title which gives a good impression of the content.
The most recent report is KD 598: Ideas about the 3-bladed VIRYA-0.65 water turbine with 20° inclined shaft coupled to the generator of the VIRYA-2.68 windmill for 12 V battery charging.
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Please make sure you give us your correct address
It’s a bit heartbreaking to think of this book going around to the other side of the world and back at great expense just because whoever ordered it failed to check that the address they gave us was complete. It’s not the first time. Please do check you have given the correct mailing address. Thanks!
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Windempowerment maintenance manual for Recipe Book turbines
![screen-shot-2016-11-19-at-16-27-16]()
WindEmpowerment
have published a Maintenance Manual for my wind turbine designs,
in free PDF download format.
(Donations are also welcome.)
Particular thanks to Gael Cesa
of Tripalium in France
for all his hard work on this.
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More free design documents from Adriaan Kragten
Adriaan writes
Dear Hugh
I am 71 years old now and in December 2017 I have ended the commercial activities for my engineering office Kragten Design. But I am still active and my website: www.kdwindturbines.nl will be maintained as long as possible. In the first half year of 2018 I have written five new free public KD-reports. Four of these reports give rotor calculations. At the menu “News” on my website you find a short description of the content of each report. At the top of the menu “KD-reports” there is the folder: “List free public KD-reports” and the folder “Sequence of KD-reports for self-study” which, I think, will be of great help for someone who wants to design a wind turbine.
Adriaan Kragten
Thanks Adriaan. This is a wonderful resource for students of wind turbine design. Here is a chart from KD35 showing the relationship between conversion “efficiency” and drag/lift ratio, over a range of tip speed ratios:
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Powerspout documents free to download
Much of my time these days is spent helping people with microhydro projects. I love it. As well as answering emails and phone-calls, I’ve been spending a lot of time helping with the PowerSpout free document library.
Click the links to view the documents.
Then click the download symbol to a the top of the screen to download them.
When planning your system, these ones could help you:
You can estimate your site’s generation potential, and even design the whole system painlessly using the online Advanced Calculator Tool. To get the best out of it please read the Hydro design and calculator manual first.
Lots of guides to off-grid system design:
- Charge controller guide
- System wiring guide
- Powershed design guide
- Diversion load guide
- Battery guide
There are lots more documents in the Index. I hope you find them useful. If you aren’t sure about anything just drop me an email and I will help.
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