Finding resistance in coils

Discussion in 'General Electronics Chat' started by crazybuoy, Aug 7, 2016.

  1. crazybuoy

    Thread Starter Active Member

    Sep 19, 2010
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    There is set of coils in 2 different way (Fig 1 & 2). For example, the resistance of one coil is 3 Ohm as shown in image. Please tell me the resistance in following way:

    Resistance between 1 & 2 in Fig 1 - ??
    Resistance between 1 & 3 in Fig 1 - ??

    Resistance between 1 & 2 in Fig 2 - ??
    Resistance between 1 & 3 in Fig 2 - ??
     
  2. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    5,804
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    If this is a Homework or examination question, post your best effort at answering.
     
  3. SLK001

    Well-Known Member

    Nov 29, 2011
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    Try using simultaneous equations to solve your problem.
     
  4. crazybuoy

    Thread Starter Active Member

    Sep 19, 2010
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    It is not a homework or exam question. I have a stepper motor, I just want to know its winding setting. Please tell me the above resistances.
     
  5. AlbertHall

    Well-Known Member

    Jun 4, 2014
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    Resistance between 1 & 2 in Fig 1 - 6 Ohms
    Resistance between 1 & 3 in Fig 1 - 6 Ohms

    Resistance between 1 & 2 in Fig 2 - 2.4 Ohms
    Resistance between 1 & 3 in Fig 2 - 3.6 Ohms

    Edit: Assuming the other pins are not connected
     
  6. crazybuoy

    Thread Starter Active Member

    Sep 19, 2010
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    Yes, all points (pins) in both figures are open. Please tell me how you calculate resistance in Fig-2?

    Thanks
     
  7. blocco a spirale

    AAC Fanatic!

    Jun 18, 2008
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    What is the make and model of this "stepper motor";)?
     
  8. AlbertHall

    Well-Known Member

    Jun 4, 2014
    1,958
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    Fig 2, pins 1 to 2 looks like this:
    upload_2016-8-7_16-45-54.png
    Some simple series and parallel resistor calculations give the resistance between 1 and 2. You can do a similar diagram and calculations for 1 to 3.
     
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