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http://dx.doi.org/10.6113/JPE.2019.19.2.497

Robust Predictive Speed Control for SPMSM Drives Based on Extended State Observers  

Xu, Yanping (Department of Electrical Engineering, Xi'an University of Technology)
Hou, Yongle (Department of Electrical Engineering, Xi'an University of Technology)
Li, Zehui (Department of Electrical Engineering, Xi'an University of Technology)
Publication Information
Journal of Power Electronics / v.19, no.2, 2019 , pp. 497-508 More about this Journal
Abstract
The predictive speed control (PSC) strategy can realize the simultaneous control of speed and current by using one cost function. As a model-based control method, the performance of the PSC is vulnerable to model mismatches such as load torque disturbances and parameter uncertainties. To solve this problem, this paper presents a robust predictive speed control (RPSC) strategy for surface-mounted permanent magnet synchronous motor (SPMSM) drives. The proposed RPSC uses extended state observers (ESOs) to estimate the lumped disturbances caused by load torque changes and parameter mismatches. The observer-based prediction model is then compensated by using the estimated disturbances. The introduction of ESOs can achieve robustness against predictive model uncertainties. In addition, a modified cost function is designed to further suppress load torque disturbances. The performance of the proposed RPSC scheme has been corroborated by experimental results under the condition of load torque changes and parameter mismatches.
Keywords
Cost function; Extended state observer (ESO); Model mismatch; Permanent magnet synchronous motor (PMSM); Predictive speed control (PSC);
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