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  • #1

    alternator help

    Hi
    Request all the experts to help me to convert this motor which is 220vac 1/2hp as alternator to produce 12v 3phase . I saw this motor on sale but could not get much information
    About this motor






    Thanks
    SAM.K
    Tags: None
  • #2
    Interesting.
    You would think its much easier and cheaper and less time to use a real alternator to produce your 3 phase 12 volts.
    Its like going backwards. From motor to alternator.
    Does the rotor have slip rings?
    If not slip rings maybe you can install permanent magnets on the rotor to cut the stator field and then see what the output is by changing the speed of the rotor. The stator may need to be rewound in a series of loop type winding to pick up an alternating field but there are many things I would like to learn about motor winding also.
    My 2 cents and I'm interested to see how you will proceed with this experiment.

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    • #3
      Sam, is that a 3 phase 220 motor to begin with, it appears to be so as it looks as if it has 6 wires to the buss bar.
      Also, how did you get the full size pic to show in the post instead of a thumbnail pic?

      thanx...24

      Comment

      • #4
        Converting motor

        Hi Samk43,

        to the forum. You will find many knowledgeable people on this forum. They cover a wide range of experience and areas of expertise. I was an industrial electrician, so maybe I can help with this. The motor in the picture appears to be a single phase multi-speed appliance motor such as is used on washing machines or dishwashers. It would be very difficult to convert that motor to produce 3 phase 12 volt power. As Adam advised you would be much better off just using a regular automotive alternator. If you want 3 phase ac from that you only have to take the alternator apart and remove the diode pack. Then take the 3 posts the diode pack was connected to and connect wires to them and feed them to the outside of the alternator and you now have 3 phase power at around 12 volts or so depending on how you regulate it and the speed it turns. Another advantage to using the alternator is it will probably be much more efficient than anything you could engineer yourself.

        I am just being curious, but why do you want 12 volt 3 phase ac power? If you don't want to answer that it is ok.

        Hope this helps, Carroll
        Just because someone disagrees with you does NOT make them your enemy. We can disagree without attacking someone.

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        • #5
          Why I asked is most three phase ac motors are rated at like 208/440 VAC or some other variation...not just 220....24

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          • #6
            Induction Generator?

            To make a 3 phase motor into an alternator will take a lot as the motor does not have the magnet rotor you need to make an alternator. Plus you would have to rewind the stator with heaver wire in order to get 12 V...but if you are looking for a generator that is a different thing. You can simply get an 3 phase transformer or 3 single phase transformers and step the voltage down to 12V. Any induction motor can work as an generator you will have to excite the stator with energy to start it or you will have to build in excitation caps. You should only have to excite one phase to start it. You can Google converting a induction motor into a generator it is very easy.

            Karl

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            • #7
              Hi
              Every one who tried to help me thanks for the help as I was out of city
              I could not responded back thanks all

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