A Dynamic Flux Observation Compensator Design of PMLSM Direct Thrust Force Control

In the direct thrust force control of PMLSM, the changes of the primary resistance can generate deviation of flux linkage observation value from its actual value, which is likely to cause the wrong choice of voltage vector and lead to the worsening and even failure of the control performance of the system. In the paper, a new type of dynamic flux compensator is designed after the pros and cons of PI regulator and adaptive observer are considered. Its compensating performance is also stimulated. The result indicates that the compensator has good robustness and dynamic performance under the parameter perturbations.