torque control of a Brushed DC motor

Discussion in 'General Electronics Chat' started by cguy, Jun 16, 2010.

  1. cguy

    Thread Starter New Member

    Dec 20, 2009
    The torque of a Brushed DC motor is proportional with the current passing through the armatures, so I want to control that current with PWM as to achieve a desired torque.

    But how exactly do you control that current? I found out the transfer function I(s)/V(s); a simulation in Matlab (with a step as the input) shows an oscillating response for a while, but eventually settles at 0

    So how do you do it?
  2. SgtWookie


    Jul 17, 2007
    Use an integrator (low-pass filter) to average the current over time.