主要介绍三种坐标变换的基本原理，包括3-2变换，d-q变换等，进行变换结构比较，-Introduces the basic principles of three kinds of coordinate transformation, including 3-2 transformation, dq transform, transform structure comparison,

采用幅值恒等原则建立的三相到两相静止坐标系和两相静止坐标系到三相坐标系的变换-Constant amplitude using the principles established by the three-phase to two-phase stationary coordinate system and the two-phase stationary coordinate system to transform the three-phase coordinate system