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Micro wind turbine

Discussion in 'General Electronics Discussion' started by Waco Bill, Jun 7, 2016.

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  1. Waco Bill

    Waco Bill

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    Jun 7, 2016
    I have a AC 3 phase .1-1.0 amp 3v-24v generator turned by a 15 inch propeller. I have been using it to light up LEDS....a light up back-yard whirly-gig. My LEDS (10mm 30000 MCD) burn out after about a couple of hours of good wind. Electrical output varies with the wind. My question is...what type of diode do I need to keep the LED bulbs from burning out?
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    you need to limit the maximum current which can flow through the LEDs.

    If they are high power LEDs (1W and above) then you will also need a heat sink to prevent them from getting too hot even at the normal operating current.

    If you look at our resource on LEDs you will find a simple constant current circuit that you could use.
     
  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    oh, you also need to protect the LEDs from reverse voltage. Are you rectifying the output of your generator?
     
  4. Waco Bill

    Waco Bill

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    Jun 7, 2016
    Sorry Im ignorant when it comes to electronics but I trying to learn. Ive had the generator wired directly to the LED is a10mm 30000 MCD. Trying to keep it simple....I thin I may need abridge rectifier?
     
  5. BobK

    BobK

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    Jan 5, 2010
  6. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    a bridge rectifier would be a good start.

    however, also check the maximum current for the LED. It's likely to be way less than 1A.

    Thanks Bob, I wrote the above and failed to post it. Your answer may be better :)
     
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