Hamiltonian model based control algorithm for electromechanical actuator

Abstract

In the paper a control algorithm of an electrical machine, that is based on its hamiltonian mathematical model described in the dq0 reference frame, is introduced. The algorithm is designed to be specifically useful to control Synchronous Reluctance Machines. In the algorithm flux linkage values in the direct and quadrature axis are treated as state variables. Those flux linkage values and the electromagnetic torque are estimated using the aforementioned model. The algorithm is divided into two modes, first to ensure fast reaching of the commanded angular velocity and second to ensure stable operation of the drive when it is obtained. Additional criterion used in the control algorithm is to minimize the ohmic losses in the phase windings. In the paper the way of formulation of the needed mathematical model by the drive controller, based on the measurement results, is also presented. The performance of the algorithm is examined numerically.