Pm winch motor as windmill generator

Discussion in 'The Projects Forum' started by v8ccc, May 3, 2010.

  1. v8ccc

    Thread Starter New Member

    May 3, 2010
    I would like to know if a 12volt or 24volt permanent magnet winch motor could be used as a generator for a windgenerator assembly?
  2. mik3

    Senior Member

    Feb 4, 2008
    Generally, DC motors can be used as generators, however, it would be good to post more detail about the motor.
  3. SgtWookie


    Jul 17, 2007
    You would really be much better off using an automotive alternator. They generate power over a much wider RPM range than a DC generator does, let alone a device that was designed to be a motor rather than a generator.
  4. BMorse

    AAC Fanatic!

    Sep 26, 2009
    But using an automotive alternator, you will have to have the windmill spin atleast a minimum of 500 RPM's to get any usable power out of it........ Using a DC PM motor that is low in RPM's would be much better for a micro generator windmill.....

    My .02

    B. Morse
  5. retched

    AAC Fanatic!

    Dec 5, 2009
    You should use BOTH.

    Ok... use a dual blade design, with a automobile alternator on one set of blades and the PMDC on the other.

    BAM. Best of both worlds. ..maybe.
  6. JDT

    Well-Known Member

    Feb 12, 2009
    An automobile alternator is designed to work at a fairly high speed. Also, it requires a DC current in the rotor to energise it. So as not to waste power in your application, this energising current needs to cut-in only when the alternator is going fast enough to generate useful power. If you have to have gearing or drive belts to increase the alternator speed then these also waste power.

    For wind turbines, low-speed permanent magnet alternators are used. It is possible to home-build these. See:- Cojnstruction/pmg_alternator_const1.html

    This is something that one day I will also have a go at. Just need the time and the money!