Abstract
This paper presents a novel model-free sliding mode control (MFSMC) method to improve the speed response of permanent magnet synchronous machine (PMSM) drive system. The ultra-local model (ULM) is first derived based on the input and the output of the PMSM. Then, the novel MFSMC method is presented, and the controller is designed based on ULM and MFSMC. A sliding mode observer (SMO) is constructed to estimate the unknown part of the ULM. The estimated unknown part is feedbacked to MFSMC controller to perform compensation for parameter perturbations and external disturbances. Compared with the sliding mode control (SMC) method, the results of simulation and experiment demonstrate that the presented MFSMC method improves the dynamic response and robustness of the PMSM drive system.
Highlights
Permanent magnet synchronous motor (PMSM) has been widely used in industrial drives, railway transportation, and electric vehicles (EVs) due to its simple structure, energy-saving, and high efficiency [1]
This paper presents a novel model-free sliding mode control (MFSMC) method based on ultra-local model (ULM)
This paper presented a novel MFSMC method to improve the speed response and robustness of the PMSM drive system
Summary
Permanent magnet synchronous motor (PMSM) has been widely used in industrial drives, railway transportation, and electric vehicles (EVs) due to its simple structure, energy-saving, and high efficiency [1]. The variations of PMSM parameters and unknown external disturbance [2,3] can cause unstable operation in the PMSM drive system. The conventional PI control method cannot satisfy higher performance control of the motor [4,5]. Many control strategies have been presented to improve the robustness and the reliability of the control of PMSM drive system, such as sliding mode control (SMC) [5–8], predictive control, fuzzy logic control, and so on. SMC is widely used for its insensitive to parameter perturbation and is easy to be implemented in engineering. A new SMC with variable speed reaching law was presented to reduce the
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