An improved delay-suppressed sliding-mode observer for sensorless vector-controlled PMSM

Chao Gong, Yihua Hu, Jinqiu Gao, Yangang Wang, Liming Yan

科研成果: 期刊稿件文章同行评审

341 引用 (Scopus)

摘要

This article presents a delay-suppressed sliding-mode observer (SMO) to observe the real-time rotor position of a permanent magnet synchronous machine (PMSM) controlled by vector control algorithms. First, in order to solve the low-pass filter (LPF) delay problem existing in the traditional signum function-based SMO, a brand new hyperbolic function is initially selected as the switching function. Because a hyperbolic function with a proper boundary layer is capable of reducing the chattering phenomenon of an SMO, it is not necessary to reemploy LPFs to eliminate the adverse impacts of chattering on the position estimation accuracy. In order to ensure the reachability and stability of the hyperbolic-function-based SMO, the observer gain is calculated by the means of a Lyapunov function in this article. Second, to solve the problem of calculation delay caused by digital computation, a current precompensation scheme based on dual-sampling strategy in one switching period is proposed. After compensating the calculation delay, the accuracy of position estimation as well as the motor control performance can be improved. Finally, the proposed SMOs with and without delay compensation are verified by both simulation and experiments that are conducted on a three-phase 1.5-kW PMSM drive prototype.

源语言英语
文章编号8901982
页(从-至)5913-5923
页数11
期刊IEEE Transactions on Industrial Electronics
67
7
DOI
出版状态已出版 - 7月 2020
已对外发布

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