Driver motor DC speed control

Discussion in 'The Projects Forum' started by risky fajar, Oct 9, 2014.

  1. risky fajar

    Thread Starter Member

    Oct 8, 2014
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    how to control the speed dc motor... ??? whather it can be controlled used microcontroller?
     
  2. ISB123

    Well-Known Member

    May 21, 2014
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  3. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    or a microcontroller/transistor/mosfet (pwm)..
    or an off the shelf DC SCR/PWM motor controller..
    obviously all DC motors are not the same..
    A proper/detailed question would include specifications on this DC motor.
     
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Off the shelf there are KB/Baldor SCR or PWM controllers, for the very simple solution, there are numerous simple PWM on ebay for ~$15.00.
    Max.
     
  5. risky fajar

    Thread Starter Member

    Oct 8, 2014
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    thank to you answer..i will question any more..
    used motor DC series....when speed motor dc low, whather torque of motor dc be decrease?? how mien speed is low we obtained torque advance ?
     
  6. risky fajar

    Thread Starter Member

    Oct 8, 2014
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    how mien controlled SCR..??? whather using PWM???
     
  7. risky fajar

    Thread Starter Member

    Oct 8, 2014
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  8. MaxHeadRoom

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    DC motor Torque curve is generally fairly flat, starting at maximum at zero rpm dropping when maximum rpm limit is reached.
    SCR bridge is usually the cheapest method, followed by the more favorable PWM.
    More is needed on your application.
    Max.
     
  9. risky fajar

    Thread Starter Member

    Oct 8, 2014
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    if i want control speed motor dc constant..what method which most efficient?? i still general with speed control motor dc series...
    risky
     
  10. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    Go back a read post # 3, & supply an answer. You may need to attach a tachometer to adjust to a given speed.
     
  11. risky fajar

    Thread Starter Member

    Oct 8, 2014
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    ok thanks for your answer... what is sensor can be used mearsured speed?? whather directly connect to tachometer??
     
  12. MaxHeadRoom

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    If just velocity a DC or digital AC tach can be used, if position, then an encoder is needed.
    Max.
     
  13. risky fajar

    Thread Starter Member

    Oct 8, 2014
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    ok max.. whather method can be used?for speed constant..whather control pulse PWM for controlled speed of motor dc..
     
  14. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Your IMG shows a PID loop via encoder, as already mentioned this is suitable for precise positioning, if you just want constant velocity, the tach method can be used, usually tach/velocity loops can control to within 1%.
    Either methods can be from self programmed Picmicro or other µp methods etc to off the shelf industrial controllers.
    You need to specify your exact intentions, and any preferred or capable methods.
    Max.
     
  15. risky fajar

    Thread Starter Member

    Oct 8, 2014
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    to obtain a high torque gear box whether to use????
     
  16. Alec_t

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    Sep 17, 2013
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    If you want to.
     
  17. risky fajar

    Thread Starter Member

    Oct 8, 2014
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    ok thanks
     
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