Design of predictive controllers for fault-tolerant surface-mounted PMSM drive systems

This study proposes the design of speed and current predictive controllers for fault-tolerant surface-mounted permanent magnet synchronous motor (PMSM) drive systems. Two faults that can occur in an inverter, open-circuit and short-circuit, are investigated. To improve dynamic responses during open-circuit and short-circuit conditions, predictive controllers are proposed. A systematic design for predictive controllers is presented here. By using predictive controllers, PMSM drive systems yield better responses than with proportional–integral controllers, including faster recovery time and a smaller drop in speed when the inverter is in a faulty state. A 32-bit digital signal processor, TMS 320F2808, is used to execute the control algorithms. Several measured results demonstrate the proposed method, which can be easily applied in industry due to its simplicity and superiority.