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制動電阻器如何工作,制動電阻器的電路連接工作原理?

發表時間:2022-04-22 16:43【 閱讀量:-查看手機網址
掃一掃!制動電阻器如何工作,制動電阻器的電路連接工作原理?掃一掃!

 有許多方法可以避免制動電阻器因過載情況而失效,例如制動斬波器晶體管監控板、使用熱敏開關的制動電阻器和本質安全的制動電阻器。從這三種方法中,我們將解釋其中一種方法,例如使用熱敏開關的制動電阻器。


 制動電阻器與熱敏開關一起使用,以檢測潛在的過載情況。一旦制動電阻器過載,它就會試圖散發比設計時更多的熱量。因此在這種情況下,一旦電阻器的溫度變得非常高,就可以釋放熱敏開關。因此,中斷電阻器或VFD的高壓電源之一,實現了以下兩個圖表

20220422164417.png

 在上述電路中,熱敏開關在極端高溫下打開。主承包商使用的控制電壓可能會中斷。因此,這會打開主接觸器并從VFD上斷開電源。

20220422164446.png

 熱敏開關會因過熱而打開??梢灾袛嘤糜陉P閉接觸器向制動電阻器的控制電壓。因此,這會打開接觸器并在VFD保持供電的同時從電阻器上斷開電源。

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