Anti-Windup Compensator Designs for Nonsalient Permanent-Magnet Synchronous Motor Speed Regulators

This paper presents and compares a number of anti-windup compensator designs which address the problem of current saturation within high-performance permanent-magnet synchronous motor applications. The compensator variants include an integrator reset scheme, back calculation and tracking, and an optimally synthesized low-order dynamic compensator. Performance is compared first through simulation tests using a nonlinear nonsalient machine model with multirate discrete time control loops. Second, the results of tests repeated on a hardware implementation are shown. In both simulation and experiment, the back calculation and tracking and low-order designs are shown to exhibit clear performance advantages over the reset strategy.