交流双馈电机在MT旋转坐标系中的矢量图研究

Study on Vector Diagram of AC Doubly-fed Machine in MT Rotating Coordinate System

根据交流双馈电动机在旋转坐标系中的数学模型,经理论分析,建立了8种不同运转状态下的空间矢量图(由不同运转方向、电动与制动、低同步与超同步3个变量构成的8种状态);给出了空间矢量图的绘制方法;并通过了仿真验证。空间矢量图揭示了在旋转坐标系中转子回路的感应电势、外接变频电源电压、电流之间的关系,为正确设计转子变频器打下良好的理论基础。

Space vector diagrams of 8 kinds of different operation status of AC doubly-fed motor were established based on theoretical analysis according to mathematic model of AC doubly-fed machine in rotating coordinate system. Drawing method of space vector diagram was given, and verified by simulation. Space vector diagram reveals the relationship between induction potential of rotor circuit and voltage as well as current of external variable-frequency power supply, which provides a good theoretical basis for appropriate design of rotor variable-frequency converter.