Abstract

Model predictive control (MPC) is a flexible control method based on accurate system model. However, when MPC is applied in open-winding (OW) permanent magnet synchronous motor (PMSM) system, the optimal voltage vector selection becomes complicated due to the increase of basic voltage vectors. In this paper, a model predictive flux control (MPFC) without weighting factors is proposed in an OW-PMSM system, which eliminates the complicated tuning work. After the characteristics of reference voltage is studied, a simplified optimal voltage vector selection is proposed to decrease the computation burden. Since the parameter mismatch usually exists in actual systems, which leads to inaccurate predictions and deterioration of the control performance. An extended state observer (ESO) is designed to enhance the system's robustness to observer the disturbance caused by parameters mismatch. Simulations verify that the proposed method is insensitive to the parameter uncertainty and performs very well both in steady and dynamic state.

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