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技术指导 5 - 现代交流传动系统中的轴承电流
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内容
第1章 - 介绍 ....................................................................................................................................................7
概述 ....................................................................................................................................................7
消除轴承电流 ..................................................................................................................................7
第 2章 - 轴承电流的产生 ...........................................................................................................................8
高频电流脉冲 .................................................................................................................................8
快速开关 ..........................................................................................................................................9
高频轴承电流是怎样产生的? ...................................................................................................9
环流 ..............................................................................................................................................9
轴接地电流 .................................................................................................................................9
容性放电电流 ......................................................................................................................... 10
共模电路 ....................................................................................................................................... 10
寄生电容 ......................................................................................................................................... 11
电流怎样流过系统? ................................................................................................................... 12
电压落差 ......................................................................................................................................... 12
共模变压器 ..................................................................................................................................... 13
电容分压器 ..................................................................................................................................... 15
第3章 - 如何防止高频轴承电流的危害 ........................................................................................... 17
三种途径.......................................................................................................................................... 17
使用多芯电机电缆 ............................................................................................................... 17
降低接地阻抗 ........................................................................................................................ 17
高频接地屏蔽电缆 .............................................................................................................. 18
遵循产品使用指导 ..................................................................................................................... 19
附加的解决方案 ................................................................................................................... 19
测量高频轴承电流 ...................................................................................................................... 19
专家测量 ......................................................................................................................................... 20