ABSTRACT To overcome the challenges of high computational burden and insufficient control accuracy in three‐vector‐based model predictive current control (TV‐MPCC) strategies, this article proposes an improved TV‐MPCC for permanent magnet synchronous motor (PMSM) drive systems fed by 3L‐NPC inverters. By integrating voltage vector preselection with a low‐complexity optimization strategy, the proposed method significantly reduces computational burden while maintaining excellent control performance even under overmodulation conditions. First, a two‐stage voltage vector preselection strategy is developed to efficiently identify candidate vectors, reducing the number of evaluated vectors from 27 to approximately 10 and significantly lowering computational complexity. Meanwhile, a corresponding duty cycle calculation method based on voltage error parameters is designed to reduce the explicit dependence on multiple motor parameters. Furthermore, an optimized voltage vector (VV) combination strategy and a low‐complexity overmodulation method are designed, thereby constructing a unified TV‐MPCC framework applicable over the full modulation range. Finally, experimental results demonstrate that the proposed method significantly shortens computation time, improves voltage utilization, and reduces current harmonic distortion.
Wu et al. (Thu,) studied this question.
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