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如何选择导电滑环材料
2022-07-01 05:03:00 【xiaohouzi007】
通过向电机制造业的从业人员了解,我们知道导电滑环的材料对电机的关键水平有着很大的影响。优质合适的滑环材料是保证电机长期稳定运行的关键因素之一。因此,通常情况下,在选择合适的导电滑环材料时,我们需要充分考虑诸多的因素,具体可以总结为以下几点:
一般情况下,在选择导电滑环材料时,应首先考虑电流和电压,特别是对于开关电源的原理来说,要考虑或超出现阶段的电压电流水准。另外,针对高电平数据信号的导电滑环而言,电源电路是另外一个必须考虑的因素,因为高电平电源电路的关键影响是噪声。电子信号的工作电压不稳定等不良特性被称为电气设备噪声。而短路的原因的来自于导电滑环电源电路的内部噪声或磁感应噪声。
目前,默孚龙科技导电滑环电源电路磁感应噪声的产生原因是开关电源原理与数据信号电源电路,如变频器、伺服控制器等过于接近;内部噪声的主要原因是导电滑环与电机碳刷表面特性阻抗的变化。因为不同材料的导电性不同,表面就会具有不同的特性阻抗,所以低成本滑环具有较高的原始特性阻抗。当导电滑环在转动时,其特性阻抗会产生微小的变化。电流量根据过渡的特性阻抗引起开关操作电压,数据信噪比由工作电压的变化决定。除了数据信号特性以外,在选择导电滑环材料时,还要考虑环境因素。例如,在极端的自然环境下,如高低温、高腐蚀,就有必要采用先进的材料来减少环境对导电滑环电机电刷表面的影响。
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