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Motor Winding Pairs

Steve Brown
Hi guys me again!


Motor winding pairs! When testing to make sure the motor windings are balanced in resistance, what are the pairs made up of? Is it U1/V2, V1/W2, W1/U2 or something completely different?


I did a google search and saw it went something like:   


W2   U2   V2

U1    V1   W1

I thought it was:

U2    V2     W2

U1    V1     W1


Making the pairs as I stated above because you place your probes diagonally to the previous one starting from the left if that makes sense, so u1 and v2, v1 and w2 and then w1 and u2. 


What pairs do you use for the winding resistance test please?
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  • 0
    Surely the simple solution is to remove the separate connections to the windings and then test them - you should get open circuit between different windings and only get a reading when you test the two end pairs of the same winding.  It should come out as Clive has said, but if the connection labels have fallen off you will still get the correct readings.

    That said, I am not sure what you are trying to achieve with your measurements. Do you suspect there is a problem with the motor? Or are you checking a new motor against the specification?

    Alasdair
Reply
  • 0
    Surely the simple solution is to remove the separate connections to the windings and then test them - you should get open circuit between different windings and only get a reading when you test the two end pairs of the same winding.  It should come out as Clive has said, but if the connection labels have fallen off you will still get the correct readings.

    That said, I am not sure what you are trying to achieve with your measurements. Do you suspect there is a problem with the motor? Or are you checking a new motor against the specification?

    Alasdair
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