EAST极向场电源控制系统EMC屏蔽设计与应用

The Shielding Design and Application of EAST Poloidal Power Supply for EMC

屏蔽是指对两个空间区域间进行金属隔离,以控制电场、磁场和电磁波由一个区域对另一个区域的感应和辐射。介绍了极向场电源系统在超导托卡马克(EAST)装置中的工作情况和工作环境的特殊性,电源系统运行中遇到的各种干扰问题,结合电磁兼容(EMC)理论,充分考虑屏蔽设计在控制系统中的重要性,对设备的干扰源进行近场和远场的定性分析,根据场源性质采取相对应的屏蔽措施。并结合EMC理论中的接地和滤波器设计,将各种干扰幅度降至最低。

Shielding is to provide metallic isolation between two areas to control the induction and radiation caused by electric field,magnetic field and electro-magnetic field from one area to another.This paper introduces the specific condition and different interference of poloidal field power supply in EAST.Then with the consideration of shileding analysis on electromagnetic compatibility（EMC） theory, this paper determines different shielding meausurements according to the field analysis on difference interference.With the theory on grounding and filter from EMC, the author designs a system to minimize the interfere.The operation illustrates the design.