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

Bao Binh Pho (Hanoi University of Science and Technology)
Nguyen Van Cao (Hanoi University of Science and Technology)
Tran Minh Hoan (Hanoi University of Science and Technology)
Phuong Vu (Hanoi University of Science and Technology)

International Journal of Power Electronics and Drive Systems (IJPEDS)
Vol 12, No 4: December 2021

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.