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A Three-Vector-Based Model Predictive Flux Control for PMSM Drives
Xu Yanping,Hu Miaomiao,Yan Zhongqiao,Zhang Yanping,Ma Hao 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.5
The model predictive fl ux control (MPFC) strategy is an improved method for the weighting factor that is diffi cult to adjust in the traditional model predictive torque control (MPTC). By analyzing the relationship among torque, stator fl ux and load angle, the simultaneous control of torque and stator fl ux amplitude is converted into the control of equivalent references stator fl ux vector, which eliminates directly the weighting factor. However, MPFC also suff ers from high torque and fl ux ripples if only one voltage vector is applied during each control period. In order to solve this problem, a three-vector-based model predictive fl ux control strategy is proposed for permanent magnet synchronous motor in this paper. Three voltage vectors are applied in one control cycle to achieve good control performance of torque and fl ux, and the durations of three vectors are determined based on the principle of stator fl ux deadbeat control. The experimental results show that, compared with the model predictive fl ux control strategy and the optimal duty model predictive fl ux control strategy, the three-vector-based model predictive fl ux control strategy can eff ectively reduce the torque and fl ux ripples, improve the system’s steady-state performance.
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