Department of Electrical Engineering,Huaiying Institute,Huai'an 223001,China;
Department of Electrical Engineering,Huaiying Institute,Huai'an 223001,China;
Department of Electrical Engineering,Huaiying Institute,Huai'an 223001,China;
Department of Electrical Engineering,Huaiying Institute,Huai'an 223001,China;
synchronous machines; electrically excited synchronous motor; direct torque control; space vector modulation; field weakening;