Assume that the coupling between the motor and the inertial load of Problem 19.25 is flexible (e.g., a long shaft). This can be modeled by adding a torsional spring between the motor inertia and the load inertia. Now we can no longer lump together the two inertias and damping coefficients as if they were one; we need to write separate equations for the two inertias. In total, there will be three equations in this system: the motor electrical equation, the motor mechanical equation (Jm and Bm), and the load mechanical equation (J and B).
Find:
The dynamic equations of the system and the transfer function from input voltage to load inertia speed.
Assumptions:
The energy conversion is ideal.
Analysis:
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