Practical results on asynchronous motor optimal control in field weakening regime

Abstract

This paper illustrates the importance of control on energy saving opportunity for electrical drives systems. The paper's objective is to present the results for a real time implementation of optimal control law for an electrical drive system with induction machine at variable flux. The optimal control is based on numerical integration of the Matrix Riccati Differential Equation and the optimal control theory. According to Bellman's theorem of optimality, the solution has been checked for different de-excitations (100%, 66 %, respectively 33%) and obtaining the reduction of the absorbed energy consumption in the case of the proposed optimal control in relation to conventional control. The optimal proposed control was also implemented on an experimental test bench and it was obtained small differences between the required signal and the acquired trajectory.