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電壓與電流變換器工作原理的區別?

發表時間:2021-02-26 18:09【 閱讀量:-查看手機網址
掃一掃!電壓與電流變換器工作原理的區別?掃一掃!

  在工業控制和許多傳感器的應用電路中,摸擬信號輸出時,一般是以電壓輸出。在以電壓方式長距離傳輸模擬信號時,信號源電阻或傳輸線路的直流電阻等會引起電壓衰減,信號接收端的輸入電阻越低,電壓衰減越大。


  電壓互感器是通過電磁感應原理輸出信號為交流信號,電壓變換器通過專電磁感應原理和整流電路輸屬出直流電流信號或電壓信號。簡介:電壓互感器(TV)是隔離高電壓,供繼電保護、自動裝置和測量儀表獲取一次電壓信息的傳感器。是一種特殊型式的變換器。變換器,是將信源發出的信息按一定的目的進行變換。


  互感器是按比例變換電壓或電流的設備。主要是將高電壓或大電流按比例變換成標準低電壓或標準小電流(5A或10A,均指額定值),以便實現測量儀表、保護設備及自動控制設備的標準化、小型化。同時互感器還可用來隔開高電壓系統,以保證人身和設備的安全。按比例變換電壓或電流的設備。交流變換器是利用電磁感應原理做成的能夠變換電壓的設備。它可以用作升壓,降壓,進行隔離等作用。


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