Reduction of common-mode voltage using a simplified FSC-MPC for a five-phase induction motor drive

Abstract

This paper presents a cascaded closed-loop control of a five-phase induction motor (IM) drive system with common-mode voltage reduction capability. The outer loop uses standard PI regulators for speed reference tracking, while the inner control loop is implemented using a reduced order finite-state model-based current predictive approach. Establishing certain constraints, different combinations of switching state vectors are obtained, leading to the generation of different magnitudes of common-mode voltages. As a result, precise speed and current control is achieved in addition to the reduction of common-mode voltage and computational burden. Experimental results are presented to validate the concept.

Keywords

• predictive control
• induction motor drives
• closed loop systems
• control system synthesis
• PI control
• electric current control
• induction motors
• machine control
• cascaded closed-loop control
• standard PI regulators
• outer loop
• common-mode voltage reduction capability
• five-phase induction motor drive system
• closed-loop control
• simplified FSC-MPC
• current control
• reduced order finite-state model-based current predictive approach
• inner control loop
• speed reference tracking