Position Sensorless Control of Switched Reluctance Motor Drives Based on a New Sliding Mode Observer Using Fourier Flux Linkage Model

• Published in: IEEE transactions on energy conversion Vol. 37; no. 2; pp. 978 - 988
• Main Authors: Sun, Xiaodong, Tang, Xingtao, Tian, Xiang, Wu, Jiangling, Zhu, Jianguo
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.06.2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Couplings; Dynamic tests; Electric motors; Error analysis; Fourier flux linkage model (FFLM); Mathematical models; nonlinear modeling; Observers; Polynomials; Position sensing; Position sensorless control; Reluctance; Reluctance motors; Robustness (mathematics); Rotors; Sliding mode control; sliding-mode observer; switched reluctance motor; Torque; Windings
• ISSN: 0885-8969; 1558-0059
• DOI: 10.1109/TEC.2021.3125494

This paper proposes a new position sensorless method for switched reluctance motor (SRM) drive control based on a sliding mode observer using nonlinear Fourier flux linkage model. First, to obtain an accurate mathematical model of SRM for establishment of sliding mode position observer (SMPO), an analytical method based on Fourier polynomial function is introduced to regress the nonlinear relationship between flux linkage, position and current. Then, a new SMPO is designed in detail to estimate the rotor position, including the establishment of SRM model of sliding mode observer, and analysis of estimation error and convergence conditions of SMPO. Finally, position sensorless control of SRM drive based on SMPO is carried out in terms of accuracy and robustness in simulation. Experiments are also given on a dynamic testing platform to verify the effectiveness of the proposed position sensorless scheme.