부산대학교 도서관

In this paper, a flux linkage adaptive direct torque control (DTC) method for permanent magnet synchronous motor (PMSM) drive is investigated to increase power factor without stabilizing stator flux at a constant value. Using this method, the stator flux linkage amplitude will be changed adaptively according to load variation. The control system scheme and analysis model for this method are presented and studied. A prototype PMSM is employed for the experiments under different load. The experimental comparison between the traditional and presented methods shows that the flux linkage adaptive DTC can improve the dynamic performance of the system and effectively increase power factor.