A model predictive control strategy for field-circuit coupled model of PMSM
by Zhang Zhiyan; Guo Pengyao; Liu Yan; Shi Hang; Zhu Yingjie; Liu Hua
International Journal of Computer Applications in Technology (IJCAT), Vol. 67, No. 2/3, 2021

Abstract: Based on the analysis of the mathematical equations and drive circuit of Permanent Magnet Synchronous Motor (PMSM), a model predictive control strategy for the controller of PMSM is proposed. The stator current discretisation model and the cost function of model predictive control are established, and voltage vector selection is derived. Then, the coupling mechanism among motor, driver and controller is analysed, and the field-circuit coupled model of a 1kW PMSM using model predictive control is set up. Next, the starting performance, load characteristics and electromagnetic field of the motor are obtained. Good speed and electromagnetic characteristics verify the effectiveness of the PMSM control strategy and the correctness of the PMSM field-circuit coupled model. Finally, the back EMF waveforms and its harmonics of the field-circuit coupled model and the finite-element model without drive circuit and controller are compared and analysed. The simulation results show that the amplitude of back EMF in both models is basically the same while the field-circuit coupled model has high THD value, which can simulate the practical conditions.

Online publication date: Thu, 17-Mar-2022

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