Need help wiring a single phase motor

Discussion in 'The Projects Forum' started by krofish, Nov 30, 2015.

  1. krofish

    Thread Starter New Member

    Nov 30, 2015
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    Just received a single phase asynchronous motor with no wiring instructions. It is 110 volt with a start and run capacitor (already wired from motor). The rotation of the motor is not important. I am a novice to this type of wiring and simply need to know how to wire the hot, neutral and ground from a switch.
    From the top left to the posts are labeled:
    W2, U2, V2, U1, V1, W1

    IMG_2215.JPG
    IMG_2223.JPG IMG_2222.JPG

    Any help would be greatly appreciated!
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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    If you can identify the main winding which looks to me like it could be V1-V2, if so the power is connected to these two normally being the main winding there is no caps in series, the other two windings would be fed from one side of each capacitor.
    M.
     
  3. #12

    Expert

    Nov 30, 2010
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    I also came to the conclusion, V1, V2, but I am too timid to say so because the people who depend on us deserve better than a guess...and that's all I have, a guess.

    Of course, the green wire from the power cord goes to the metal case using any convenient screw.
     
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  4. krofish

    Thread Starter New Member

    Nov 30, 2015
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    Thank you for your response. How can I identify the main winding?
     
  5. MaxHeadRoom

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    You should have three windings, two will have a capacitor connected to one of its leads.
    It may be easier to lift off all connections to check individual conductors.
    As per #12, the ground goes to the frame of the motor.
    Max.
     
  6. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    I would say the Red wires are the main winding, Yellow is the start/direction winding...
     
    Last edited: Dec 1, 2015
  7. krofish

    Thread Starter New Member

    Nov 30, 2015
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    Is there a way that I can test the resistance between terminals to determine the main winding?
     
  8. Externet

    AAC Fanatic!

    Nov 29, 2005
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  9. MaxHeadRoom

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    You should be able to detect three distinct an separate windings, the ones without a series cap is the main winding and the AC is connected across these.
    Max.
     
  10. krofish

    Thread Starter New Member

    Nov 30, 2015
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    I really appreciate the reply Max but I have no idea how to detect "three distinct windings". I am an electrical idiot and have never dealt with an electric motor. Thanks
     
  11. MaxHeadRoom

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    Do you have a meter at least?
    Max.
     
  12. krofish

    Thread Starter New Member

    Nov 30, 2015
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    Yes
     
  13. MaxHeadRoom

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    If mark or keep track of the connections and lift off each conductor you should be able to identify the three separate windings the pair with the lowest resistance is generally the run winding and this is the pair that the power would be applied to.
    The rest are taken off these via the capacitors.
    Max.
     
  14. krofish

    Thread Starter New Member

    Nov 30, 2015
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    the resistance was as follows:
    Red to red (v1-v2) 1.5 ohms
    Yellow to yellow (w1-w2) 11.1 ohms
    Blue to blue (u1-u2) .7 ohms

    So, line and neutral to u1 and u2 and polarity is unimportant?
    Thanks again for your help!
     
  15. MaxHeadRoom

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  16. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    The two brass links are the mains terminals...

    Centre Live, Right Neutral

    the small blue wires are the capacitor run switch.
     
  17. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Same as post #2 & #3.
    It might be advisable to take the motor into a motor shop and get them to do a quick confirmation.;)
    Max.
     
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