International Journal of Frontiers in Engineering Technology, 1969, 8(1); doi: 10.25236/IJFET.2026.080105.
Aoxiang Tian1, Shuaishuai Su2,3
1College of Information Science and Engineering, Northeastern University, Shenyang, 110001, China
2State Key Laboratory of Optical Field Manipulation Science and Technology, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209, China
3University of Chinese Academy of Sciences, Beijing, 100049, China
To address the chattering that often occurs in position-sensorless control systems using sliding-mode observers (SMOs) for surface-mounted permanent-magnet synchronous motors (SPMSMs) at medium and high speeds, this paper proposes an improved integral sliding-mode observer. The traditional discontinuous sign function is replaced by a continuous, smooth saturation function, and the observer is reformulated with a derived algorithm. Using an SPMSM as the test object, both the conventional SMO and the proposed integral SMO are simulated and compared in MATLAB. Results show that the new observer reduces the speed-tracking error to less than 12.5% of that of the conventional SMO, markedly improving accuracy. The proposed method offers stronger speed-tracking capability, enhanced stability, and higher precision, effectively mitigating chattering.
Novel Integral SMO, SPMSM, Position Sensorless Control, Chattering Suppression
Aoxiang Tian, Shuaishuai Su. Position-Sensorless Control of SPMSM Based on Novel Integral SMO. International Journal of Frontiers in Engineering Technology (2026), Vol. 8, Issue 1: 31-37. https://doi.org/10.25236/IJFET.2026.080105.
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