Category Archives: wind systems tutorial

48-volt heating controller

Here is a diagram for a simple 48-volt heating control system for a 3 metre ‘recipe‘ turbine.  I did this design for Dr Francis Greaves in Ireland. Notes: There is no battery but the voltage is stabilised by the bank … Continue reading

Posted in construction, products/technical, wind systems tutorial | 7 Comments

Simple tower

Thanks to Jan Wolstenholme (on an Irish coastal site) for this ultra simple tower design for those with very open, high wind sites and plenty of scaffold pipe. “The main tetrahedron is made of  six poles which are two scaffold … Continue reading

Posted in construction, People, wind systems tutorial | 9 Comments

Grid connected homebrew wind turbines

In response to a comment from Michael Jones I am posting a brief note about grid connection of homebrew wind turbines of my Recipe designs. The turbine output voltage depends on both the rpm and number of turns in the … Continue reading

Posted in construction, products/technical, wind systems tutorial | 10 Comments

Eoliennes, panneaux solaires, comment franchir le pas avec succès !

Solarmad have a new web site in French language Solarmad ont créé un nouveau site web http://www.solarmad-nrj.com/ Eoliennes, panneaux solaires, comment franchir le pas avec succès ! the latest wind turbine from solarmad in Madagascar.

Posted in construction, developing world, France, wind systems tutorial | Leave a comment

Dyocore in San Diego

By claiming for a 1.6 kW wind turbine on your roof, you could get it paid for by California State subsidies.  This one can produce that much (in the sales pitch) although it’s only the size of a 200 watt … Continue reading

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Calculating the energy production of a wind turbine

The bottom line with a wind turbine is how much energy it produces.  Do not confuse this with the maximum power output!  Rated power output is only achieved at rated windspeed, which will only occur from time to time.  The … Continue reading

Posted in UK small wind scene, wind systems tutorial | 4 Comments

How to use a charge controller

I have been working on some pages to help people with wiring up their wind turbines to a battery with a charge controller.  These pages explain how to size the controller, choose a dump load, configure the dip switches and … Continue reading

Posted in construction, my own projects, products/technical, wind systems tutorial | 5 Comments

Airgap flux experiments at CometME

Noam Dotan has been sending me results of some interesting tests that he has done on two alternators: 4200 diameter turbine grid-tie alternator with 20 magnets 46 x 30 x 15 mm and 15 coils 260 turns of 0.9mm diameter … Continue reading

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My first ferrite magnet project

Back in the 1980s I had spent ten years building wind turbines that were based on dynamos (USA=’generators’) out of military jeeps.  They were cheap and well made, but they had serious drawbacks.  The magnetism required to make them work … Continue reading

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Things that don’t work – Mick Sagrillo on the popular idiocies of modern small wind.

This presentation by Mick Sagrillo is from 2009.  It’s a good summary of what is wrong with rooftop wind and is backed up by actual production data.  If you are enthusiastic about rooftop windpower then you ought to look at … Continue reading

Posted in People, products/technical, Rooftop madness, wind systems tutorial | 4 Comments