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    Bi-directional DC motor control without h-bridge?

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    • rs4raceundefined
      rs4race
      last edited by

      Previously I used a h-bridge to control a dc motor forward and reverse. On a new machine I am planning to use the duetwifi with x5 expansion board to control everything. I'm interested in controlling these DC motors without the addition of an h-bridge. Is this possible? How can I accomplish this?

      Thanks,
      Jeff

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      • dc42undefined
        dc42 administrators
        last edited by

        You need either an H-bridge, or a DPDT relay plus a flyback diode to protect the drive mosfet. If you use a relay then you should be careful to reduce the motor current to zero and pause a short time before reversing the motor, otherwise you will get arcing over the relay contacts.

        Duet WiFi hardware designer and firmware engineer
        Please do not ask me for Duet support via PM or email, use the forum
        http://www.escher3d.com, https://miscsolutions.wordpress.com

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