Finite control set model predictive control approach of nine switch inverter-based drive systems: Design, analysis, and validation

• Published in: ISA transactions 2021-04, Vol.110, p.283-304
• Main Authors: Gulbudak, Ozan, Gokdag, Mustafa
• Format: Article
• Language: English
• Subjects: Digital control; FPGA; Model predictive control; Multi-step MPC; Nine-switch inverter; Optimal control
• ISSN: 0019-0578; 1879-2022
• DOI: 10.1016/j.isatra.2020.10.037

This paper describes a model predictive control method for Nine-Switch Inverter (NSI)-based AC drive systems. Two separate three-phase AC loads (dual-output mode operation) or a single six-phase load (six-phase mode operation) can be connected to output terminals of an NSI. Three different Finite Control Set Model Predictive Control (FCS-MPC) strategies are presented and described. Firstly, dual-output mode FCS-MPC provides flexible control of detached load stages without any undesirable interaction. When disseminated loads are needed to be controlled, the output terminals of NSI are individually connected to separate load stages. Secondly, six-phase mode FCS-MPC provides robust control of six-phase load current. Thirdly, the predictive control scheme for controlling multiple induction machines is presented. Experimental and simulation tests have demonstrated that the proposed method exhibits a secured converter operation. The proposed predictive control strategies of Nine-Switch Inverter are accomplished using a Field Programmable Gate Arrays (FPGA). •Dual-output mode MPC provides independent control of two seprate loads.•Six-phase mode MPC provides robust control of six-phase load fed by NSI.•Dual-predictive torque control method is experimentaly validated.•Detailed design steps of multi-step MPC of NSI are presented.