ABSTRACT
The usual configuration for resolver position feedback is to have the resolver geared to the servo drive motor. Computer-aided design programs for hydraulic drive sizing are based on the fact that the hydraulic resonance is the predominant resonance in the servo loop. With electric drives the mechanical time constant is not of prime consideration since it can be compensated for with the drive compensation. These are two important dynamic considerations with electric and hydraulic servo drives using resolver feedback at the servo motor. Since the position feedback resolver is close-coupled to the drive servo motor, all other mechanical resonances and nonlinearities are excluded from the position servo loop. Recommendations for the required indexes of performance (I.P.) are identical with those given in Section 9.2.
