BT3000 motor testing

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  • sscherin
    Senior Member
    • Dec 2003
    • 772
    • Kennewick, WA, USA.

    BT3000 motor testing

    Does anyone know how many ohms I should see when testing the coils in the motor?

    It's the 15a motor. It ran slow but I'm not sure if it was brushes or a fried coil.
    William's Law--
    There is no mechanical problem so difficult that it
    cannot be solved by brute strength and ignorance.
  • Hoover
    Veteran Member
    • Mar 2003
    • 1273
    • USA.

    #2
    R=V/I V=120 volts I=Amperes 15 R=8 ohms
    No good deed goes unpunished

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    • LCHIEN
      Internet Fact Checker
      • Dec 2002
      • 20996
      • Katy, TX, USA.
      • BT3000 vintage 1999

      #3
      Originally posted by Hoover
      R=V/I V=120 volts I=Amperes 15 R=8 ohms
      i don't think that's what you'll measure. Reactive AC current is different than the DC current seen by a voltmeter.

      I'm guessing your ohmeter wull see much closer to zero ohms, maybe around 1 or 2 ohms, offhand.
      Last edited by LCHIEN; 05-12-2010, 11:41 PM.
      Loring in Katy, TX USA
      If your only tool is a hammer, you tend to treat all problems as if they were nails.
      BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questions

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      • sscherin
        Senior Member
        • Dec 2003
        • 772
        • Kennewick, WA, USA.

        #4
        Yeah I'd expect a result in the .5-2 ohm range much like testing the stator on my motorcycle..

        The plan was to check resistance between windings.. less than ?? ohms (.5 is the low end of then range on my GS1000 Stator) indicated a short in the windings..

        2nd test winding to armature checking for a winding shorted to the armature..

        I guess the best thing would be to test a known good motor and compare to the other one I know has some problems..
        William's Law--
        There is no mechanical problem so difficult that it
        cannot be solved by brute strength and ignorance.

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