Journal of Dalian Maritime University >
2016 , Vol. 42 >Issue 2: 75 - 82
DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2016.02.013
Load disturbance rejection based dual sliding mode control of permanent magnet synchronous motors
Received date: 2015-06-23
Revised date: 2015-07-20
Online published: 2015-08-21
In order to improve the load disturbance rejection of the vector control system of a permanent magnet synchronous motor (PMSM), a double sliding mode control (DSMC) scheme of PMSM was proposed by using incorporating sliding mode speed controller and sliding mode load torque observer. The DSMC scheme can effectively reduce the static error by adding integral term of speed error in sliding surface. Meanwhile, the convergence rate of system state variables can be improved by employing an exponential reaching law. Moreover, the sliding mode load torque observer was designed to estimate load torque and motor speed, which would be further fed forward to the sliding mode speed controller, and the amplitude of the discontinuous item was reduced. In this context, the chattering pertaining to the sliding mode speed controller can be suppressed, and thereby enhancing the dynamic and robust performance with remarkable ability of disturbance rejection. Simulation results demonstrate the effectiveness and superiority of the proposed control scheme.
WANG Ning , LIU Xing-yong . Load disturbance rejection based dual sliding mode control of permanent magnet synchronous motors[J]. Journal of Dalian Maritime University, 2016 , 42(2) : 75 -82 . DOI: 10.16411/j.cnki.issn1006-7736.2016.02.013
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