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RSS FeedsEnergies, Vol. 15, Pages 7200: Cascade-Free Modulated Predictive Direct Speed Control of PMSM Drives (Energies)

 
 

30 september 2022 12:56:33

 
Energies, Vol. 15, Pages 7200: Cascade-Free Modulated Predictive Direct Speed Control of PMSM Drives (Energies)
 


Conventional predictive control for permanent magnet synchronous motors (PMSMs) contains dual speed and current loops, and has a complex structure and multiple parameters to be tuned. Conventional predictive direct speed control (PDSC) exhibits an unsatisfactory steady-state performance. To tackle these issues, this paper presents a cascade-free modulated PDSC (MPDSC) scheme for PMSM drives. First, a speed predictive model is built, where a second-order sliding mode observer is employed to quickly and robustly estimate the load torque. Then, a dual objective cost function with speed and stator current tracking is designed, which improves the system’s steady-state performance. Furthermore, the analytical solution of the constrained optimal voltage vector is derived and it is synthesized by space vector modulation, resulting in a fixed switching frequency. Experimental results show that the proposed MPDSC has stronger robustness, and lower torque ripples and stator current harmonics compared to conventional PDSC.


 
107 viewsCategory: Biophysics, Biotechnology, Physics
 
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