Deadbeat control of permanent magnet synchronous motor based on sliding active disturbance rejection controller

Abstract

Due to its high effiency and high power density, the permanent magnet synchronous motor (PMSM) widely is used in servo drive systems. However, the PMSM position loop is vulnerable to be affected by the uncertainties of motor parameter variations and load disturbances. This paper proposes a new deadbeat control strategy for PMSM, in which a sliding active disturbance rejection controller is adopted. When the moment of inertia and the load is used as a disturbance and the rotor angle is used as state variables, sliding mode extended state observer can be developed, which provides a high frequency channel for the high frequency component. It reduces the chattering effect and compensates the system losses due to disturbance. So, the proposed control system has strong robustness to the internal disturbance, external disturbance and parameter variation. Also, the deadbeat voltage control law is obtained. Simulated results are given for verification.