Robust cascade‐free predictive speed control for PMSM drives based on Extended State Observer

The direct predictive speed controller (DPSC) deals with the prediction of motor based on precise mechanical parameters. However, parameters are dependent practical applications and may not match their actual values, which leads to inaccurate behaviour deteriorates performance algorithm. A three-order Extended State Observer is designed for a permanent magnet synchronous observe unknown overall disturbance system compensate error, reduces usage constants improves robustness against parameter uncertainties, accurate become unessential. To improve current dynamics, by using proper weighting position angle observation along disturbance, new incorporated in control law developed PSC strategy. proposed strategy evaluated through experimental results two-level voltage source inverter. Finally, work experimentally compared control, considering several indices.