Controlling a DC motor

Discussion in 'General Electronics Chat' started by Agoenk_Noenk, May 25, 2015.

  1. Agoenk_Noenk

    Thread Starter New Member

    May 25, 2015
    2
    0
    Hello everyone...
    I have some generel questions, please if you can help.
    I have a controller that control a 12V DC motor. I use Ni-Mh battery 12Vx2 3800mAh as power source.
    When i run the motor, the battery runs out very quickly. The motor current measured is 4.8A when motor start and 0.5A when steady.
    My question is...
    Can anyone help me to find a controller which can reduce the starting current at least 50% of previous condition?
    Thank you...
     
  2. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    Welcome to AAC!
    Hijacking a long-dead thread is unlikely to get replies. You should start your own thread. Perhaps the mods can move this post?
     
  3. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,347
    Hello,

    I moved your posts from the thread you justs hijacked:
    DC Motor Starter

    Bertus
     
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Buy one of the $5 DC motor controllers on ebay and replace the control pot with a ramp circuit.
    Max.
     
  5. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    If you halve the start-up current for the motor the torque and angular acceleration will also be halved, so it will take about twice as long to get up to its running speed. Hence the total energy drawn from the battery will be about the same :(.
     
  6. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,549
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    You may want to look at Li-Po battery, they are generally a better choice for small motor operation.
    Max.
     
    Last edited: May 25, 2015
  7. Agoenk_Noenk

    Thread Starter New Member

    May 25, 2015
    2
    0
    Thank you all for the reply...
     
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