机械与电子2025，Vol.43Issue(12)：52-58,67,8.
一种连续可导滑模切换函数的PMSM无传感控制
A Continuously Differentiable Switching Function-based Sensorless Control Strategy for PMSM
刘旺 1王春梅 1李秀 1李佳鑫1
作者信息
- 1. 贵州师范大学机械与电气工程学院,贵州 贵阳 550025
- 折叠
摘要
Abstract
To address the issues of high-frequency chattering and low estimation accuracy in conven-tional sliding mode observers(SMOs)used for sensorless control of permanent magnet synchronous mo-tors(PMSMs),this paper proposes a continuously differentiable super-twisting observer enhanced with a phase-locked loop(PLL)for precise rotor position extraction.The approach replaces the traditional dis-continuous sign function with a smooth switching function that is both continuously differentiable and sat-urated,effectively suppressing chattering while improving robustness to external disturbances.A compre-hensive control model is developed in MATLAB/Simulink to evaluate the proposed method against the conventional SMO based on hyperbolic tangent functions.Simulation results demonstrate that the im-proved observer exhibits near-zero overshoot in speed tracking,faster recovery under load disturbances,and significantly reduced steady-state errors.Rotor position estimation error peaks are reduced by over 60%,and the observed trajectory smoothly and closely matches the actual position.Torque ripple is nearly halved,and three-phase current profiles maintain high symmetry and stability.These findings confirm that the proposed method offers notable advantages in dynamic response,estimation precision,and system robustness,making it a promising solution for sensorless PMSM control in complex operating conditions.关键词
永磁同步电机/无位置传感控制/滑模观测器/超螺旋算法/锁相环/连续可导函数Key words
permanent magnet synchronous motor/sensorless control/sliding mode observer/super-twisting algorithm/phase-locked loop/continuously differentiable function分类
信息技术与安全科学引用本文复制引用
刘旺,王春梅,李秀,李佳鑫..一种连续可导滑模切换函数的PMSM无传感控制[J].机械与电子,2025,43(12):52-58,67,8.
