To address the problem that permanent magnet synchronous motor speed control is susceptible to external load disturbances and that the control performance of traditional control methods is insufficient, this paper proposes a permanent magnet synchronous motor speed control method based on fixed-time sliding-mode control and fixed-time disturbance observer, which is effectively capable of dealing with external load disturbances and improving the speed control performance. First, to cope with external load disturbances, a fixed-time disturbance observer is designed to observe the unknown disturbances in the ultra-local model. To improve the control performance and ensure the convergence time, a fixed-time sliding mode speed controller is designed based on the fixed-time disturbance observer-based ultra-local model for controlling the speed of the permanent magnet synchronous motor. Then, the fixed-time convergence of the designed fixed-time speed controller and fixed-time observer is proved using the Lyapunov function. Finally, three different control schemes, that is, proportional-integral control, sliding mode control, and the controller designed in this paper, are compared, and the simulation results verify that the method proposed in this paper can effectively control external load disturbances, reduce the overshoot of the system, and accelerate the convergence time of the system.
Speed Control for PMSM Based on Fixed-time Sliding Mode Control With a Fixed-time Disturbances Observer
10.10.2024
541974 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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