Transfer function for dc motor in labview?

Question

mathematical model to start with

Answer 1

moment_inertia x"(t) + viscous_friction x'(t) + inductance x'(t)= torque(t)

T(s)/RPM(s) = MI s^2 + (VF + L) s

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All values must be in p.u. (per unit).

MI = moment _inertia/nameplate power

VI = viscous friction time constant, i.e, time it takes the motor (and load) to drop 62.3% of full speed.

L = motor inductance time constant, time it takes the current to reach 62.3% of full load.

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