从矢量的角度讲解交流电机矢量控制

Teaching of the Vector Control for AC Motors from View of Vector Point

为适合于少学时"交流调速系统"课程教学的需要,使学生容易理解矢量控制在交流电机调速以外的应用,本文提出了从矢量的角度讲解交流电机矢量控制的思路。从电磁转矩关于定、转子电流和转子位置角的瞬时值表达式入手,推导出了电磁转矩关于定子电流矢量和三个磁链矢量的表达式。利用这些表达式和矢量图,直观阐释了经磁场定向后定子电流转矩分量与励磁分量实现解耦的机理。

To meet the requirement of AC drives system teaching and to make students easy to understand the other applications of the vector control,a novel way to teach Vector Control of AC Motors is presented using vector analysis in this paper.Electrical torque equations expressed by stator current vector and flux vectors are deduced.The discoupling of torque component and magnetizing component of stator current are visually explained by the deduced equations and the complex vector diagram.So the vector control system of AC motors is easily understood.