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  1. GearlessGenerator

    Water Turbine Help!

    @Lionel! I am sharing my own experience. It's not difficult when you build model/prototype - Using PMA+Inverter scheme. When the purpose is the prove of concept. - FYI: a $1.00/watt at $0.10/KWH requires 10,000 continuously operational hours to recover cost. 1 year= 24*365 = 8760 Hrs Using...
  2. GearlessGenerator

    Water Turbine Help!

    Hi SplashEng I like to share some thoughts though they may not belong to "want to hear" category. Specially in small hydro devices; (1) It contains so much power; about 1000 folds of the wind; a device with a few percents or even dozens more the efficiencies does not make much of the big...
  3. GearlessGenerator

    Motor specs required for a generator.

    Dear Cllrdoor. For a motor to act as generator it should outputs about 1.2 the rate power at when it is driven at 1.07 (107 percents) the synchronous RPM. FYI: There are many efforts to lower its synchronous RPM using VFD (variable frequency drive) let's say to 100RPM . . . . and . . .then...
  4. GearlessGenerator

    Induction generator protection

    FYI: In case you want operate an induction generator at low speed (18->300RPM)without gearbox, these diode circuits will be very much helpful. http://www.philica.com/display_article.php?article_id=316

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