Monthly Archives: June 2014

Performance data for two Recipe turbines

New performance data is available from field tests in Holland showing the 1.8 metre diameter turbine producing close to the predicted energy at a 4.8 m/s average windspeed. This turbine is grid-tied using a Mastervolt inverter protected by LDR circuits.   … Continue reading

Posted in construction, developing world, performance, power curve data | Leave a comment

Ideas for a 34 pole alternator design by Adriaan

“Dear Hugh and others During the last weeks I have designed a new water pumping windmill, the VIRYA-3S. This windmill makes use of a direct drive 34-pole PM-generator and is primary meant to be coupled to the 3-phase asynchronous motor … Continue reading

Posted in construction, People | 1 Comment

ebook plans for 2F turbine now finally published

Over the last couple of years I have been building some ferrite magnet alternators.  This is partly due to the sharp increase in neo magnet pricing a few years back and also the problems I have seen with neo magnets … Continue reading

Posted in construction, ferrite magnets, my own projects | 7 Comments

Measuring the Power Curve of a Small-scale Wind Turbine

Here is a paper describing how they measured the power curve of one of my early-design turbines in Nicaragua.  They clarify the impact of various parameters such as generator heating, battery voltage, controller settings, furling system and anemometer position. The … Continue reading

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Wind turbine builders from Holland

Dear Hugh, About a year ago we have had contact about the inverter choice for the 4200 project. The Ginlong inverter is doing a great job so far. The turbine has produced over 1000kwh after about 4 months on a … Continue reading

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“Build a small wind turbine” workshop in Greece

23-31st August: “Build a small wind turbine” construction workshop in Nea Makri, Greece Kostas knows what he is talking about so this should be good.  more details…WindTurbineCourseAug2014

Posted in construction, courses, Notices | Leave a comment