Model-Free Simplified Predictive Current Control of PMSM Drive with Ultra-Local Model-Based EKF

Emrah Zerdali,Patrick Wheeler

doi:10.1109/gpecom52585.2021.9587527

Abstract

The importance of permanent magnet synchronous machines (PMSMs) is increasing day by day due to trends in the electrification of transportation and the use of wind farms. The predictive current control (PCC) strategy has been widely applied to the control of power converters and electrical machines over the past decade. However, parameter dependency and computational complexity are known disadvantages of the conventional PCC strategy. To deal with the weakness caused by parameter inconsistencies, model-free PCC strategy has been proposed. The simplified PCC strategies have also been applied to reduce computational complexity. In this paper, a model-free simplified PCC (MF-SPCC) strategy combined with the ultra-local model-based extended Kalman filter (EKF) has been proposed for a PMSM drive. The proposed electric drive system has been verified by simulation studies and finally robust control performance has been achieved under parameter mismatches.

Highlights

Compared to other machines, permanent magnet synchronous machines (PMSMs) provide some advantages such as higher power density, lower inertia, higher efficiency, and higher torque-to-weight ratio [1]
The block diagram of the SPMSM drive based on the MFSPCC combined with the extended Kalman filter (EKF) is shown in Fig. 2 and a PMSM
Considering the resulting control performances, it is shown that the proposed PMSM drive based on modelfree simplified PCC (MF-SPCC) with EKF can compensate for the adverse effects of parameter changes

Summary

INTRODUCTION

Permanent magnet synchronous machines (PMSMs) provide some advantages such as higher power density, lower inertia, higher efficiency, and higher torque-to-weight ratio [1]. Despite all advantages of the PCC strategy, it has some drawbacks reported in the literature: current harmonics, variable switching frequency, computational complexity, and parameter dependency [9]. To deal with these problems, effective solutions have been proposed. A model-free simplified PCC strategy combined with EKF-based on the ultra-local model of PMSM has been proposed for PMSM drives. The proposed PMSM drive is robust to parameter changes and its computational load has been reduced by adopting simplified PCC strategy It is validated through extensive simulation studies.

ULTRA-LOCAL MODEL OF PMSM

EKF OBSERVER

MF-SPCC OF PMSM WITH EKF OBSERVER

RESULTS

CONCLUSION