Dear friends
I put a 8 pin deep micro switch to change tha value of torque in DRV8711. By changing the Torque value, fortunately I succeed to obtain the reasonable the sine cuurent graph. But when I change the Vm or PWM frequency this wave is destroyed. In result I must change the value of torque.
1- Is there any relation between the PWM frequency and Torque?
2- Is there any relation between the Vm and Torque?
3- I do the same experints on DRV8825 and this deriver has also the same problem. As you know we need to change the speed of stepper motor in our devices during time.
Pleses help us kindly to deal with this problems.
Many Many Thanks.
Hadi