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Driving two motors using a single current driver

Discussion in 'Sensors and Actuators' started by Nima Najmaei, Aug 3, 2014.

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  1. Nima Najmaei

    Nima Najmaei

    Aug 3, 2014

    I want to drive two motors, and I have just one current driver/controller. I want to activate one motor when I have a positive polarity in the current generated, and activate the other motor when the polarity switches to negative.


    Positive Polarity: Motor 1 (ON) Motor 2 (OFF)
    Negative Polarity: Motor 1 (OFF) Motor 2 (ON)

    Can you help me on how to do this? Any ideas?

    I know we can use diodes to do that, but is there any more reliable and professional way to do it. Please help a clueless Mechanical Engineer.


  2. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    Nov 28, 2011
    Hello and welcome to Electronics Point :)

    The diagram you've drawn should work fine.

    I don't think you'll need diodes across the motors to suppress the back EMF because each motor/diode pair will suppress the back EMF of the other motor.

    It might be more "professional" to use two separate drivers, but I think that's a fair solution.
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