Akademik Veri Yönetim Sistemi
European Control Conference (ECC), London, Kanada, 12 - 15 Temmuz 2022, ss.590-595, (Tam Metin Bildiri)
A concept of nonlinear optimal control is introduced for IPMSM drives. The control configuration remains the same as for the conventional control with three PI controllers for the d and q axes currents and velocity, but these controllers are replaced by corresponding nonlinear optimal controllers. The proposed controllers include linear (with Linear Quadratic Regulator - LQR) parts and nonlinear optimal parts emulating the automatic adjustment of the LQR gains based on operating conditions. The nonlinear parts are designed based on Krasovskiy's optimality criterion leading to an explicit solution of the control design problem. The proposed controller possesses some robustness properties which is explored in simulations. Compared to the conventional system, it allows to reduce velocity overshoot and torque oscillations without extending the transient times. The control concept is validated using a test rig.