Research on Adaptive Sliding Mode Sensorless Observer Based on A Novel Deadbeat Predictive Torque Control Strategy for PMSM

摘要

In this paper, considering the disadvantages such as large torque ripple and unfixed switching frequency of the traditional direct torque control (TDTC), a deadbeat predictive torque control strategy (DB-PTC) based on stator flux coordinate was proposed. The DB-PTC can effectively reduce the torque ripple with simple implementation. Secondly, in the sensorless control of the DB-PTC, the adaptive sliding mode observer (ASMO) was designed to overcome the problems such as poor anti-interference of model reference adaptive observer (MRAS) and large switching jitter of sliding mode observer (SMO). By comparing these three kinds of observers, in addition to effectively eliminating the switching jitter, the ASMO had a strong parameter robustness on the basis of high-precision recognition of speed and rotor position. Finally, the correctness of the theoretical analysis was verified by simulation studies.