volume | PIER Journals

Abstract

The finite set model predictive control (FCS-MPC) method for quasi-Z-source inverter-permanent magnet synchronous motor (QZSI-PMSM) system suffers from the problems of unclear linkage between control objectives, complex control system, and poor control performance. A three-phase duty cycle modulation-based model predictive control (TDCM-MPC) strategy without cost function is proposed. In this strategy, the control objectives are converted firstly to make a connection between the control variables of inverter-side and motor-side, and based on it construct a system of nonhomogeneous linear equations to calculate the three-phase duty cycle. In addition, the three-phase duty cycles may have a secondary correction according to the size of the capacitor voltage error to realize the overall control of the four control variables. Finally, the driving pulse is generated based on space vector modulation (SVM) to obtain smaller steady-state ripples. The experimental results show that, compared with the conventional FCS-MPC, the proposed TDCM-MPC strategy reduces the computation of the control system and can obtain better control performance.

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Dr. Yang Zhang

Dr. Kun Cao

Dr. Wenjing Yi

Dr. Yuwei Meng

Dr. Zhun Cheng