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选线和PCB布局可降低感应噪声

固态继电器只需要少量电源即可工作，因此即使有一点感应噪声也足以导致系统故障。
为避免感应噪声，请务必注意威廉希尔官方网站 板布局中正确的导线选择和走线布线。
电线选择
请勿在输入线旁边连接电源线，因为这很容易导致感应噪声影响固态继电器。
如果在固态继电器的输入端子上施加感应噪声，则以下电缆可以提供帮助。
双绞线：减少电磁噪声
屏蔽电缆：减少静电噪音
威廉希尔官方网站 板布局
在布线威廉希尔官方网站 板布局之前，请检查SSR的规格以确定建议的爬电距离和间隙距离。
例如，东芝，TLP175A的数据表中列出了以下设计要求。
备注：
爬电距离是沿绝缘表面测量的两个导体之间（或导体与设备边界表面之间）的最短路径。
间隙距离是通过空气测量的两个导体之间（或导体与设备的边界表面之间）的最短距离。
其他
考虑使用由电容器和电阻器组合而成的滤波器;
这样可以有效降低高频设备产生的噪音。

以上来自于谷歌翻译


以下为原文

        Solid State Relays only require a small amount of power to operate, so even a little inductive noise is enough to result in a system malfunction. To avoid inductive noise, it is important to be aware of proper wire selection and trace routing in your circuit board layout.
  • Wire Selection
    Please do not connect power lines next to input lines because this easily causes inductive noise to affect the solid state relay. If inductive noise is imposed on the input terminals of the solid state relay, the following cables can help.


  • Twisted-pair cable: to reduce electromagnetic noise
  • Shielded cable: to reduce static noise

  • Circuit Board Layout
    Before routing the circuit board layout, please check the SSR’s specification to determine what creepage distance and clearance distance are suggested. For example, Toshiba, TLP175A has the below design requirements listed in its datasheet.


Remarks:
  • Creepage distance is the shortest path between two conductors (or between a conductor and the bounding surface of the equipment) measured along an insulation surface.
  • Clearance distance is the shortest distance between two conductors (or between a conductor and the bounding surface of the equipment) measured through the air.

  • Other
    Consider using a filter which consists of a combination of capacitor and resistor; this will effectively reduce noise generated from high-frequency equipment too.

回帖（3）

倪山骋

2018-10-25 15:33:38
我认为LC滤波器优于RC滤波器。

以上来自于谷歌翻译


以下为原文

        LC filter is better than RC filter , I think.
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卓侨汉

2018-10-25 15:52:17
是的，与LC滤波器相比，RC滤波器会消耗更多功率并显示更差的噪声抑制。
但RC滤波器的成本低于LC滤波器。
RC滤波器本身也没有共振，而LC滤波器可能会在没有适当阻尼的情况下产生共振。

以上来自于谷歌翻译


以下为原文

        Yes, an RC filter will dissipate more power and display worse noise rejection than an LC filter.
But RC filters are less costly than LC filters. RC filters are also inherently free of resonance, while an LC filter may resonate if not properly damped.
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倪山骋

2018-10-25 15:57:43
很难说哪种RC滤波器或LC滤波器会消耗更多功率，这取决于实际应用。

以上来自于谷歌翻译


以下为原文

        It is hard to say which RC filter or LC filter will dissipate more power, it depend on real application.
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