TY - JOUR
T1 - An improved delay-suppressed sliding-mode observer for sensorless vector-controlled PMSM
AU - Gong, Chao
AU - Hu, Yihua
AU - Gao, Jinqiu
AU - Wang, Yangang
AU - Yan, Liming
N1 - Publisher Copyright:
© 1982-2012 IEEE.
PY - 2020/7
Y1 - 2020/7
N2 - 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.
AB - 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.
KW - Delay compensation
KW - permanent magnet synchronous machine (PMSM)
KW - sensorless control
KW - sliding-mode observer (SMO)
KW - switching function
UR - http://www.scopus.com/inward/record.url?scp=85081724835&partnerID=8YFLogxK
U2 - 10.1109/TIE.2019.2952824
DO - 10.1109/TIE.2019.2952824
M3 - 文章
AN - SCOPUS:85081724835
SN - 0278-0046
VL - 67
SP - 5913
EP - 5923
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 7
M1 - 8901982
ER -