Current Control of Triple-Redundancy PMSM Using Deadbeat Active Disturbance Rejection Control

In digital control systems, a one-step delay is observed in the PWM duty cycle update. In order to eliminate the effect of delay and improve the dynamic response of the current loop, the classical deadbeat current control (DBCC) is introduced based on decoupled multistator (DMS) modeling. As the classical DBCC is contingent upon the precision of the motor parameters, the deadbeat active disturbance rejection control (DB-ADRC) is employed. An extended state observer (ESO) is proposed to observe and compensate for dynamic changes and unknown disturbances of the control system. The stability and parameter robustness of the current closed-loop are enhanced. Effectiveness of the proposed method is verified by simulation results.