Qi Xin, Xiao Houxiu, Peng Tao, Han Xiaotao, Li Liang
Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan, China.
Rev Sci Instrum. 2018 Dec;89(12):124705. doi: 10.1063/1.5051385.
Due to extreme operating conditions, the failure of a magnet frequently occurs in pulsed magnetic field facilities, which not only will disable magnets but also may trigger a violent explosion. Insulation failure occurs more frequently and usually before mechanical failure. Detecting the insulation failure of pulsed magnets is an important issue for pulsed high magnetic field systems. The Partial Discharge (PD) signal is usually used as an insulation monitoring tool. However, the weak PD signals are hidden in the strong / background signals, which are difficult to be separated. This paper will present a differential PD pick-up coil scheme, and the characteristics and mechanism of the PD signals are discussed based on the experimental results.
由于极端的运行条件，脉冲磁场设施中磁体故障频繁发生，这不仅会使磁体失效，还可能引发剧烈爆炸。绝缘故障发生更为频繁，且通常早于机械故障。检测脉冲磁体的绝缘故障是脉冲高磁场系统的一个重要问题。局部放电（PD）信号通常用作绝缘监测工具。然而，微弱的PD信号隐藏在强/背景信号中，难以分离。本文将提出一种差分PD拾取线圈方案，并根据实验结果讨论PD信号的特性和机理。
