Rectifier volt drop

mazza355
mazza355 Registered Users Posts: 4 ✭
edited September 2020 in Wind Power Generation #1
Hi all quite new to wind power and wonder if someone could answer my question.i have a 1000w 48v turbine connected to a 300ah 24v forklift battery.so a bit puzzled as not making alot of power . with the 3 phases not connected to rectifier I have good voltage 50+ volts but when connected to rectifier the voltage max's out at 20 volts on  three phase side with good wind is this normal because of rectifier  

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  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    #2
    If you simply connect a wind turdine to a 3 phase rectifier and then to a battery, the battery when charging, will clamp the rectifier voltage to the battery voltage.  It's takes a mighty wind to get much power out of a wind turdine, and with your wind, your device may not be able to charge the batteries.
    Powerfab top of pole PV mount | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
    || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
    || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

    solar: http://tinyurl.com/LMR-Solar
    gen: http://tinyurl.com/LMR-Lister ,

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  • mazza355
    mazza355 Registered Users Posts: 4 ✭
    edited September 2020 #3
    Ok thanks so what is a better way.can I use solar controller after rectifier.
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  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    #4
    You can't use a Solar Controller with a wind turdine.  Solar controllers unload the power source (PV panels) when the batteries are full

    Wind controllers start switching in large loads ( dump loads ) when the battery gets full, to prevent unloading the turbine, when Unloaded, will over speed and grenade itself, shedding blades that can fly half a mile.
    https://www.youtube.com/watch?v=nShKqcfmF-U
    https://www.youtube.com/watch?v=NLInrjUtFGI


    Powerfab top of pole PV mount | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
    || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
    || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

    solar: http://tinyurl.com/LMR-Solar
    gen: http://tinyurl.com/LMR-Lister ,

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  • mazza355
    mazza355 Registered Users Posts: 4 ✭
    #5
    Sorry should have stated I have a separate dump load circuit on the batteries.what other ways is there.
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  • mazza355
    mazza355 Registered Users Posts: 4 ✭
    #6
    Those big turbines are geared are they as mine spin very rapidly in the wind
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  • mvas
    mvas Registered Users Posts: 395 ✭✭✭
    edited December 2020 #7
    mazza355 said:
    Hi all quite new to wind power and wonder if someone could answer my question.i have a 1000w 48v turbine connected to a 300ah 24v forklift battery.so a bit puzzled as not making alot of power . with the 3 phases not connected to rectifier I have good voltage 50+ volts but when connected to rectifier the voltage max's out at 20 volts on  three phase side with good wind is this normal because of rectifier  

    20 Volts input (measured) on the AC input side of the 3 Phase Rectifier, may be OK.
    NOTE: When connected to the 3-Phase Rectifier, you are NOT measuring an AC Sine Wave.
    What you really need to know is ...
    How many AMPS are coming out of the 3 Phase Rectifier and into the battery bank ?
    Without knowing the AMPS,
    you cannot say, "... not making a lot of power ...", because you do not know the power.

    What make & model is your 1000 Watt 48V Wind Turbine ?
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