Bi-directional DC motor control without h-bridge?



  • 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


  • administrators

    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.


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