上分对方更好地山丹上单地方很舒服郭德纲大哥山东干上单感受到法国水电费大范甘迪 个(In AC speed regulation, direct torque control (DTC) has become a research hotspot in the field because of its novelty, simple structure, direct control and dynamic characteristics. The basic idea is to control the stator flux through voltage, to control the torque directly, and to control and adjust the speed.)