PMG-Is this possible?

Discussion in 'Windtura Generators' started by suncitydave, Jan 7, 2010.

  1. suncitydave

    suncitydave WindyNation Engineer

    I found a PMG with some remarkable claims and would like to know if someone can tell me if they
    are realistic,possible or just alot of hype.The PMG claims that at 550-600 RPM's,it can generate
    2700 watts(fixed load)and 450-500 volts(rectified DC values) .If this is true, the amps would be 5.4 to 6;
    ohms 75 to 92.6; with a volts to RPM ratio of .204 to .22. Even at 80% efficency,that comes to 2160 watts
    and 360-400 volts. If true,it would be possible to generate 50+ KWH per day and 1500+ KWH per month.
    Is this possible? Do I need more information? Are my numbers correct?
    Please let me know.
    Thank you Suncitydave
  2. windyguru

    windyguru WindyNation Expert

    It is possible but what are you going to do with all that extra voltage. Unless you are using an expensive and sophisticated grid tie inverter, which changes the high voltage to amps for a grid feed, you will not be capturing most of the energy produced.

    Also, you are going to need some really large blades.
  3. Rick  Clark

    Rick Clark WindyNation Engineer


    What motor was it you are talking about? I'm looking for a grid tie in motor.
    Thanks Rick
  4. Minnesota

    Minnesota WindyNation Engineer

    As a point of reference:

    Skystream 3.7
    Rated 2400 watts (2.4KW)
    Rated windspeed=29mph
    Rotor diameter = 12ft
    Rated RPM=450
    kwh/m = 400 (at 12mph, which is the industry MPH benchmark windspeed)
    Rate at 12mph = 556w
    Cost $9,600 w/o pole or installation

    The PMG you mentioned would have to fly blades at least as big as the unit above and up in clean air. The ratio of rated output to output at 12mph is approx 23%, so for a 2700 watt rated unit it possibly could do 621w at 12mph which would equate to 447KWH/m.
  5. BeachBum

    BeachBum WindyNation Engineer

    It is no longer possible to purchase a skystream without the factory tower, also it must be installed by an authorized skystream dealer to be covered under their warranty. That product has many issues including terrible dealer and custome support. I can send you a link to a skystream forum if you like. Total cost is actually over 20K :eek:

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