Accurate torque-sensorless control approach for interior permanent-magnet synchronous machine based on cascaded sliding mode observer

The Journal of Engineering

Jing He²  Kai-Hui Zhao²  Tao Li²  Jiang-Hua Feng²  Chang-Fan Zhang⁴  Xiang-Fei Li⁴  Jian-Hua Liu⁴ 

[1] CRRC Zhuzhou Institute Co., Ltd, Zhuzhou 412007, People'School of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, People'School of Traffic Engineering, Hunan University of Technology, Zhuzhou 412007, People's Republic of China

关键词: cascaded observer design;    stator resistance;    variable gain adaptive SMO;    speed estimation;    Lyapunov stability analysis;    vector control;    system parameters variations;    external disturbances;    d–q reference frame;    α–β reference frame;    rotor position estimation;    surface-mounted permanent-magnet synchronous machine;    interior permanent-magnet synchronous machine;    IPMSM model;    torque-sensorless control;    active flux SMO;    chattering reduction;    cascaded sliding mode observer;    global asymptotic stability;    cascaded SMO;   

DOI  :  10.1049/joe.2017.0160

学科分类：工程和技术（综合）

来源: IET

【 摘 要 】

To improve the accuracy of torque control for vector control of interior permanent-magnet synchronous machine (IPMSM), this study proposes a torque-sensorless control method based on cascaded sliding mode observer (SMO). First, the active flux model is discussed, which converts the model of IPMSM into the equivalent model of surface-mounted permanent-magnet synchronous machine. Second, to reduce chattering caused by system parameters variations and external disturbances, the cascaded observer is designed, which is composed of a variable gain adaptive SMO and an active flux SMO. The variable gain adaptive SMO is designed to estimate the speed, rotor position and stator resistance in the d–q reference frame. The active flux SMO is designed to estimate the active flux and torque in the α–β reference frame. Global asymptotic stability of the observers is guaranteed by the Lyapunov stability analysis. Finally, simulations and experiments are carried out to verify the effectiveness of the proposed control scheme.

【 授权许可】

CC BY