Current Control for SPMSM in Field-Weakening Region Based on Final-State Control

Abstract

SPMSMs (Surface Permanent Magnet Synchronous Motors) are employed for many industrial applications. SPMSM drive systems should realize a quick torque response and have a wide operating range. For quick current response in field-weakening region, a new current control based on final-state control is proposed in this study. Final-state control settles state variables in a final state from an initial state with feedforward input during finite time. In addition, current response under voltage limit is analyzed by the voltage limit circle of SPMSM with transient term.