Modified multistep model predictive control for three-phase induction motor drive system considering the common-mode voltage minimization

Bao Binh Pho, Nguyen Van Cao, Tran Minh Hoan, Phuong Vu


It is acknowledged that the common-mode voltage may have detrimental effects on an induction motor (IM) drive system if not properly addressed. Therefore, in this paper, a modified multistep model predictive control method for IM drive system considering the common-mode voltage minimization is proposed. This research uses a multi-objective cost function, before applying the Sphere Decoding Algorithm to find the optimal control input. The results show that the proposed control method not only reduces the common-mode voltage significantly but also mitigates the computational burden of the microprocessor without affecting the system performance. The proposed control method is simulated by MATLAB-Simulink for an IM drive system with an 11-level cascaded H-bridge inverter.


Cascaded H-Bridge Inveter; Common-mode voltage; Field oriented control; Multistep predictive current control; Sphere decoder

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