Simple three phase motor wiring question

Discussion in 'General Electronics Chat' started by oidium45, Sep 24, 2011.

  1. oidium45

    Thread Starter Active Member

    Apr 24, 2010
    130
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    Assuming that a motor is wired up to L1,L2,L3 (in that order) and it is moving forward. I understand that swapping two legs will cause the motor to go in reverse. For example: (L1,L3,L2), (L2,L1,L3), (L3,L2,L1). But what effect would this configuration likely produce? (L3,L2,L1), (L3,L1,L2), (L2,L3,L1).
     
  2. #12

    Expert

    Nov 30, 2010
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    Just count the number of 2 wire reversals. Odd number, it runs backwards. Even number, it's turning the same way.
     
  3. oidium45

    Thread Starter Active Member

    Apr 24, 2010
    130
    8
    Eh? Odd number? Even number?
    Are you saying that if i have "one" two wire reversal it operates in reverse, and "two" two wire reversals will cause the motor to operate forward again?
     
  4. #12

    Expert

    Nov 30, 2010
    16,314
    6,818
    The numbers 1,3,5,7,9 are odd numbers. The numbers 2,4,6,8 are even numbers.
     
  5. oidium45

    Thread Starter Active Member

    Apr 24, 2010
    130
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    Sarcasm is rarely helpful...
     
  6. #12

    Expert

    Nov 30, 2010
    16,314
    6,818
    And you adding clarification to your question after I answered really makes me look sarcastic, but your premise in post #3 is correct. Every time you swap 2 wires, the motor reverses. Two reverses is back where it was in the first place.
     
  7. oidium45

    Thread Starter Active Member

    Apr 24, 2010
    130
    8
    Thank you! I appreciate the help.
    Just to clarify, i was updating the post during your response.
     
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