Design and Implementation of Model-Free Predictive Current and Speed Control of Surface Permanent Magnet Synchronous Motor using a Robust Nonlinear Disturbance Observer Against of Variation of Parameters and Disturbances
Subject Areas : electrical and computer engineering
Mohammad Bagher SepahKar
1
,
Abolfazl Halvaei Niasar
2
*
1 - Department of Power, Faculty of Electrical and Computer Engineering, , University of Kashan, Kashan, Iran
2 - Department of Electrical and Computer Engineering, University of Kashan
Keywords: Permanent-magnet synchronous motor (PMSM), model-free predictive control (MFPC), nonlinear disturbance observer (NDO), model-free predictive current and speed control (MFPCSC),
Abstract :
In the drive control of permanent magnet synchronous motors (PMSMs), the control system must be designed to work in different conditions and against of changes in motor parameters and unknown disturbances. In order to enhance the drive performance of PMSM motor, the model-predictive control independent of current and speed model (MFPCSC) is proposed in this article. This method only uses the input and output of the system and does not involve the motor parameters in the drive control, and it is robust to the changes of the motor parameters. The conventional model-independent predictive control method requires setting several control parameters. To improve the performance of the drive system of this motor and make it robust to changes in parameters and disturbances, the proposed MFPCSC method is designed based on the nonlinear disturbance observer (NDO). This observer can estimate system disturbances with more accuracy and stability, and the amount of calculations is small. The simulation and practical test results of the proposed MFPCSC method combined with the NDO show that the proposed control method has high robustness to parameter changes, favorable transient response, small output ripple, and improved transient characteristics, and can accurately and stably estimate system disturbances.
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