Scoraig 2017 wind turbine workshop photos

The self-timer group photo session.

On this year’s course we built a 2F machine but with 16 magnets instead of the usual 12.  I have a cheap source of these smaller magnets.  The 2F is a “2 metre diameter Ferrite magnet wind turbine” which is documented in my 2F wind turbine construction manual.

The rpm is a little higher than the 12-pole version.  We played with adding an extra layer of magnets to one rotor, and got about 15% higher flux density (hence lower rpm) but I don’t think I will build any serious alternators stacked like that.

Most of the blade carving was done with drawknives but I did not get any pics of that.  It’s an easier procedure than the one in my Recipe Book and seems to give good results for this size of turbine.

I am very grateful to Kostas Latoufis for coming to help, and for putting up with me so patiently.  Also grateful to the five participants for their hard work and good company.

 

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4 Responses to Scoraig 2017 wind turbine workshop photos

  1. Jimmy says:

    Lovely to see that well done

  2. David Simms says:

    Looks like a fun time.
    just one question…Given that you are off-grid, did you use your system’s batteries to do the welding -I know that some people do that- or did you use a gas generator ?

    • hugh says:

      hi David,

      Yes we use the batteries and inverter to weld. Much better than a generator. Silent and smooth with instant power response. for many years I used a generator and it’s great to now have a big enough system to comfortably weld with it. A decent 48V battery and a 3kW inverter is all you need to run an inverter/welder (much more efficient than the old buzz box type). I have had many engine-based welders over the years but using renewables is by far better.

      cheers
      Hugh

      • David Simms says:

        Interesting…I use an inverter welder, myself, and I like it very much; small, light, DC output and it does a great job. When asking myself about welding with wind/solar, I’ve always considered the straight-off-the-battery approach but I like your approach more. It’s not as messy and, unlike an engine-welder, it’s not running even when you’re not striking an arc.

        years ago when we were running on wind, I had rebuilt a two-cylinder Wisconsin engine and I teamed it up with a 200A, 24 v aircraft generator for welding. It worked very well but had I set it up to dump charge into the batteries when not actually striking an arc, I could have justified it a bit better. I definitely prefer your idea and I’ll file it away for future use.

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