关键词: 车辆工程；永磁同步电机；滑模自抗扰控制；趋近律；偏差解耦；鲁棒性

Abstract: A sliding mode active disturbance rejection decoupling control method of permanent magnet synchronous motor (PMSM) based on current deviation was proposed to address the problem of poor dynamic decoupling effect when there was current coupling and inductance parameter mismatch during the operation of PMSM. The proposed method was based on the mathematical model of the motor in the coordinate system of synchronous rotation of d and q axes. The deviation decoupling control was used to compensate the current coupling terms of d and q axes of the motor. In order to accelerate the time for the system to stabilize during startup and reduce output chattering, a new approach law including system state was designed by introducing hyperbolic tangent function through the integral sliding mode control. The difference between the estimated current value and the actual value was used as an expansion observation to comprehensively observe and compensate for disturbances, and the stability of the proposed controller was theoretically analyzed and proved. The simulation and experiment results show that the proposed method improves the rapidity and dynamic control performance of the motor, and thus realizes the approximate complete decoupling of d and q axis currents.

Key words: vehicle engineering; permanent magnet synchronous motor; sliding mode active disturbance rejection control; approach law; deviation decoupling; robustness