摘要详情

ID / 提交时间

6 / 2025-03-28 16:55:22

标题

Electromagnetic Interference Evalation and Shielding considerations of Servo Drives

关键字

radiated electromagnetic interference (EMI).,electromagnetic shielding

主题及专题

全体主题

状态

全文待审

作者

Yuming Fan / Xinjiang University

Binbin Xiang / Xinjiang University

Qi Liu / Xinjiang Astronomical Observatory (XAO) of the Chinese Academy of Sciences

Minghui Cai / Xinjiang Astronomical Observatory (XAO) of the Chinese Academy of Sciences

Xiaofeng Li / China Electronics Technology Group 33rd Research Institute

Bingyang Lu / University of Chinese Academy of Sciences；Xinjiang Astronomical Observatory (XAO) of the Chinese Academy of Sciences

摘要

Servo drives are widely used in radio telescope driving systems, yet their power switching devices generate broadband electromagnetic interference due to high-frequency switching characteristics, which adversely affects astronomical observations. This study addresses this issue by employing near-field diagnostic method in an anechoic chamber to analysis the radiation characteristics of critical drive modules, identifying core interference sources through a radiation threshold evaluation model. Experimental results demonstrate that the radiation intensity from inverter circuits significantly exceeds that of rectifier and filter modules, with peak radiation levels surpassing the threshold by about 35 dB. Accordingly, both module-level and system-level electromagnetic protection schemes are proposed. The research results provide theoretical foundations and practical references for electromagnetic shielding design in high-power radio telescope servo control systems.