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Dropping 42V to 30V at 9A?

  1. Jul 13, 2012 #1
    Hi everyone,

    I'm in the process of building a CNC machine. It is controlled by 3 stepper motors controlled by a driver board. Each motor uses 3A, and my board can only handle 36V.

    How do I drop my 42V power supply to 30V?
    -I can't find a high amperage, 30V linear regulator.
    -A bunch of diodes in series to drop the voltage would not work because the current will drop when some motors are not in use.
  2. jcsd
  3. Jul 13, 2012 #2


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