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Question Cyrtron MD30C regenerative current protection

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by SaintFrank, Sep 7, 2025 at 09:07.

  1. SaintFrank

    SaintFrank Member

    Joined:
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    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino
    Hi everyone,

    I ordered 3 Cytron MD30C motorcontrollers for the 500W 24V motors on my new 3dof simulator build.
    I have 3 Meanwell RSP-1500-24V PSU 63A , but probable only use 1 or 2.

    https://www.xsimulator.net/communit...or-flight-and-space-gaming.19571/#post-257438

    The reason for choosing these controllers was price. (I got them for 115 euro) compared to sabertooth (275 euro for 2)

    My question is protection against regenerative current , and maybe other electrical problems
    I only have basic electrical/soldering skills


    The cryton manual states:
    If Switching Power Supply is being used as power source for MD30C, we recommend parallel it with same voltage battery. This is to absorb the re-gen power from motor. DC brushed motor will become generator when it is slow down and rotate by external force.

    -2 equal 12V battries connected in series would give me 24V (24V are not common here)
    is it ok to use 2x12v instead of one 24V?
    How many Ampera hour (Ah) does it need to be?

    -Another option like Sebastian2 on his build thread with modified shunt regulators with trim pods and load resistors for each psu/controller/motor unit. It looks like a lot of wiring and soldering, going this way

    -On the sabertooth controller you can only use load resistors is that possible with the cytron MD30C?
    This looks like a very simple and inexpensive solution.
    - Also see the use of diodes on some builds.

    Can anyone help me out on what choosing the best and safe setup.

    Thanks
    SaintFrank, Sep 7, 2025 at 09:07
    #1