1. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
    Dismiss Notice

For windmill project..

Discussion in 'Alternative Energy' started by pablome, Mar 12, 2009.

  1. pablome

    pablome New Member

    Joined:
    Feb 9, 2007
    Messages:
    72
    Likes:
    1
    Ill have a dc motor that will generate voltage from the couple blades. What kind of battery should I use(preferably 12v) that will be coming from a charge controller.
     
  2. Jules_Theone

    Jules_Theone Member

    Joined:
    Jan 22, 2009
    Messages:
    167
    Likes:
    3
    Location:
    Exeter, England
    What voltage do you have from the DC motor? How many amps? Which charge controller do you have?

    Anyway, I would suggest lead-acid batteries because they are cheap, and can deal with punishment.
     
  3. pablome

    pablome New Member

    Joined:
    Feb 9, 2007
    Messages:
    72
    Likes:
    1
    Jules_Theone -------------What voltage do you have from the DC motor? How many amps? Which charge controller do you have?

    Anyway, I would suggest lead-acid batteries because they are cheap, and can deal with punishment. ---------------

    DC motor is supposed to generate 12V DC. 1Amp..or thats after the inverter, 12Vac 1 amp. 50 W i think.
     
  4. dave

    Dave New Member

    Joined:
    Jan 12, 1997
    Messages:
    -
    Likes:
    0


     
  5. Jules_Theone

    Jules_Theone Member

    Joined:
    Jan 22, 2009
    Messages:
    167
    Likes:
    3
    Location:
    Exeter, England

    I don't understand -

    12v x 1A = 12W

    or

    50W/12V = 4.1A


    12Vac = 12v x 1.41* = 16.8Vdc

    * (RMS)

    13.8V is ideal for charging lead acid batteries, with the two diode drop from 16v it will be ok.

    If you're using an inverter, that should have a battery low shut-down to stop the battery discharging too much, but it's also an idea to us a wind charger controller that can dump energy into a load when it's very windy or when the battery is fully charged.

    I have a simple FET voltage clamp that dumps load into a high power resistor in a bucket of water when the voltage goes over 14v.
     
    Last edited: Mar 16, 2009
  6. pablome

    pablome New Member

    Joined:
    Feb 9, 2007
    Messages:
    72
    Likes:
    1
    The 50W after the inverter, that makes more sense.
     
  7. Thunderchild

    Thunderchild New Member

    Joined:
    Jul 3, 2005
    Messages:
    2,294
    Likes:
    9
    Location:
    UK
    the inverter won't create power only up your input voltage and loose you 10 % of the wattage in the process (90 % efficient inverter)
     

Share This Page