Is it possible to control the output torque of a brushed DC motor using PWM?
From my understanding the speed is directly proportional to voltage applied and torque is proportional to current drawn. So if the load of the motor increases it will just simply draw more current (if the load is within its torque limit). Since I do not have any current controller in my motor driver board there is no way I can control the output torque of the motor. How can I solve this problem? I read that a hardware feedback loop using an operational amplifier can be used to keep the current proportional to the reference voltage. Is this correct? And is it possible to make such a circuit for a 90W, 24V DC motor?
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