controlling DC motors

Discussion in 'General Electronics Chat' started by kballing, Jul 23, 2007.

  1. kballing

    Thread Starter Member

    Jun 18, 2007
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    I have a 24V 68W power supply, and 2 12V 30W motors that I need to power. It is more important that the first motor is at max power all the time and the second is not so important. How do I set this up?
     
  2. kballing

    Thread Starter Member

    Jun 18, 2007
    18
    0
    P.S. This is all DC
     
  3. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Seeing that you have:
    1- 24 volt supply
    2- 12 volt motors

    You might be tempted to wire the two 12-volt motors in series, but you'll need to make sure that current flow isn't interrupted.

    Connect an ohmmeter across the terminals of a motor. Turn the motor shaft very slowly for at least one complete revolution. If at any point you read an open circuit for either motor, you will not be able to wire them in series.
     
  4. kballing

    Thread Starter Member

    Jun 18, 2007
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    0
    I assume that I would use a voltage divider to supply 12 across each motor in parallel?
     
  5. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    You will want to avoid trying to drop the voltage to the motor using a resistor divider. The motor will not be able to develop any torque.

    hgmjr
     
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