Design and Simulation of Coordinated Speed Controller for Multiple Electrically Excited Synchronous Motors

Abstract

This study is focused on the design and simulation of coordinated speed controllers for multiple electrically excited synchronous motors (EESMs). The mathematical modeling representing the multiple electrically excited synchronous motors was developed using physical modeling in which the dynamic nature and the non-linear effect between electrically excited synchronous motors was considered. The model was then used to design a controller in order to coordinate the speed of the electrically exci ted synchronous motors through cross coupling techniques in which speed and current signals of the motors were all taken as cross-feedback signal and the interval matrix was used to set parameters boundary. The controller designed and the traditional proportional integral (PI) controller were compared by simulation using MATLAB Simulink program and the results shows that the designed controller has a better control performance with smaller overshoot of 0.34% and smaller synchronization error of 0.11rpm as compared to PI controller which have overshoot of 0.88% and synchronization error of 0.36rpm.