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一、绪言三相感应电动机由于控制技术的进步,使它进到一直使用直流机的领域,而它的控制理论多是根据矢量控制理论。矢量控制理论是西德提出的,使发生转矩的机构与直流机类似,以滋通与二次磁势正交为基础。进行三相二相的座标变换用等效二相机说明磁通与二次磁势的正交性。按照转矩指令确定等效二相机的一次电流,再把它反变换到三相座标,确定它的一次电流。矢量变换本来是电流型控制,因为座标变换它的理论和控制电路都过于复杂。矢量控制的另一问题是对电磁暂态现象没有充分考虑。
I. INTRODUCTION As the control technology advances, the three-phase induction motor has brought it into the field of using the direct current machine all the time and its control theory is mostly based on vector control theory. Vector control theory is proposed by West Germany, so that the torque generating mechanism and DC machine is similar to ZOOM and the quadrature quadrature basis. Coordinate transformation of three-phase two-phase Equivalent two cameras illustrate the orthogonality of the flux and the secondary magnetic potential. According to the torque command to determine the equivalent of two primary camera current, then inverse transform it to three-phase coordinates, to determine its primary current. Vector conversion was originally current-mode control, because of its coordinate transformation theory and control circuits are too complicated. Another problem with vector control is that electromagnetic transient phenomena are not adequately considered.