Power supply for DC motors

Discussion in 'General Electronics Chat' started by dmta, Aug 24, 2013.

  1. dmta

    Thread Starter Member

    Mar 24, 2013
    32
    1
    Hi all,

    I need a variable power supply to control 2 H bridges which drive 2 DC motors. The max output current and voltage is 5A and 20V respectively. I have designed the following circuit based on Dave Jones's lab supply where the output voltage and current is set by filtered PWM signals.

    What can I do to improve the stability and quality on this design? Can someone recommend a better power transistor for this as I find it a little hard to choose one. Your input will be most valuable.

    Regards
     
  2. wayneh

    Expert

    Sep 9, 2010
    12,101
    3,036
    You can buy very inexpensive motor controllers on e-bay these days. It's more expensive to build your own.
     
  3. Alan brad

    New Member

    Aug 29, 2013
    9
    0
    I have a 24v/20A supply on the bench right now. It is a Mean-Well SP-480-24...
     
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