volume | PIER Journals

Abstract

To address the problems of difficulty in adjusting weight coefficients in model predictive torque control of permanent magnet synchronous motors and the large influence of parameters on the motor control performance, a no weighing factor model predictive torque control based on a composite sliding mode disturbance observer is proposed. Firstly, the parallel structure of torque and magnetic chain is designed. The weighting factors are eliminated by choosing a common optimal voltage vector. Secondly, a composite sliding mode perturbation observer is designed to reduce the dependence on an accurate model of the motor. An improved variable gain approximation rate is introduced to eliminate observer jitter. A power exponential term is added to improve the exponential approximation term and to increase the convergence speed of the system state. Finally, the experimental results show that the proposed strategy not only eliminates the cumbersome tuning work of the weight coefficients but also improves the control performance of the motor under parameter mismatch.

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Dr. Yang Zhang

Dr. Chenhui Liu

Dr. Sicheng Li

Dr. Kun Cao

Dr. Yiping Yang

Dr. Zhun Cheng