DC motor starting current

Discussion in 'General Electronics Chat' started by Cabwood, May 13, 2009.

  1. Cabwood

    Thread Starter Member

    Feb 8, 2009
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    Will the motor start OK if the supply is current limited to, say, 2A?
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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  3. Cabwood

    Thread Starter Member

    Feb 8, 2009
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    My question was aimed at establishing whether the motor in the original thread could be powered from a current limited supply, thereby eliminating the need for a supply that can handle inrush currents of 11A.

    Current limiting is a piece of cake. Why isn't this an appropriate approach for the problem in the original thread?
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
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    Pardon me if I got the wrong impression from your post. The discussion had settled on a PS that would supply the startup current.

    You are correct the current limiting is quite simple. The question not asked or answered is about loading on the motor after startup. Any load would be problematic with a current limited supply.
     
  5. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Which motor?


    It may start or not depending on the load on its axis. If you limit the stall current you reduce the starting torque.
     
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