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12v PSU -> 24V or 36V - help needed [Solved]

Discussion in 'Electronic and hardware generally' started by Pit, Jun 14, 2015.

  1. Pit

    Pit - - - - - - - - - - - - - - - - Gold Contributor

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    My Motion Simulator:
    DC motor, Arduino, 6DOF
    @SeatTime tyi what I have reported to Olimex:

    Hello
    Today I got ready my test unit. The first test using 12V passed successfully. The chip became hot (without cooler), but not as hot as I expected. Despite of that I put a cooler on it due to the higher voltage for the next test: unfortunately the 24V test failed. From the very first beginning (first I reduce the power by the Arduino down to 30% and then raise it up) the motor was very jerky and stopped while moving the potentiometer. There was no real movement - only some "cogging". Despite of the (big) cooler the chip became extremely hot, too hot. I stopped the test before the chip would have been blown away.
    Please keep in mind that my motors meet the specs of the VNH3SP30: 130W, 24V, 6.9A max.

    So I have to determine that the BB-VNH3SP30 is not able to handle voltages over 12V respectively over 16V (conclusion ofpololu.com).
  2. Vdub180

    Vdub180 Member

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    Mine have started to be very jurky even in the smc utility motors move but seem to have a lot of interference