Adaptive gain tuning rule for nonlinear sliding-mode speed control of encoderless three-phase permanent magnet assisted synchronous motor

In this paper, an adaptive gain tuning rule is designed for the nonlinear sliding mode speed control (NSMSC) in order to enhance dynamic performance and robustness of permanent magnet assisted synchronous reluctance motor (PMa-SynRM) with considering parameter uncertainties. A surface whose parameters are altering time at first. The proposed NSMSC can minimize settling without any overshoot via utilizing a low damping ratio starting along high as output approaches target set-point. addition, it eliminates problem singularity upper bound uncertain term that hard be measured practically well ensures rapid convergence finite time, through employing simple adaptation law. Moreover, enhancing system efficiency throughout constant torque region, utilizes maximum per ampere technique. stability assured Lyapunov theory. Furthermore, estimator employed estimating analysis experimental results indicate effectiveness feasibility estimation approach 1.1-kW PMa-SynRM under different references, electrical mechanical disparities, load disturbance conditions.