I am a bachelor student and trying to simulate a DC motor based on 3257024CR Faulhaber dc motor. Unfortunately, I have a issue with the motor's parameter. The simulation model needs a parameter called "Viscous frictional coefficient" which I contacted to my motor's company and they said you can pass up this parameter for our dc motor. How can I pass it up?(Consider it zero or one).
I would be grateful if help me to solve these issues.