IC31132G01

IC31132G01
IC31132G01
IC31132G01

(4)速度检测电路:以装在异步电动机轴机上的速度检测器(tg、plg等)的信号为速度信号，送入运算回路，根据指令和运算可使电动机按指令速度运转。

         　　(5)保护电路:检测主电路的电压、电流等，当发生过载或过电压等异常时，为了防止逆变器和异步电动机损坏，使逆变器停止工作或抑制电压、电流值。

         概述
主电路是给异步电动机提供调压调频电源的电力变换部分，变频器的主电路大体上可分为两类:电压型是将电压源的直流变换为交流的变频器，直流回路的滤波是电容。电流型是将电流源的直流变换为交流的变频器，其直流回路滤波是电感。 它由三部分构成，将工频电源变换为直流功率的“整流器”，吸收在 变流器 和 逆变器 产生的电压脉动的“平波回路”，以及将直流功率变换为交流功率的“逆变器”。

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