EPRO PR6423/00D-030 振動傳感器+CON021

EPRO PR6423/00D-030 振動傳感器+CON021

學習用可編程控制器控制交流異步電動機正反轉，并對電動機正反轉進行接線。

二、實驗器材：

1．個人電腦PC。

2．PLC程控器實驗裝置。

3．RS—232數據通信線。

4．繼電控制裝置實驗板。

5．異步電動機一臺。

6．導線若干。

三、實驗內容說明

吊車或某些生產機械的提升機構需要作左右上下兩個方向的運動，拖動它們的電動機必須能作正、反兩個方向的旋轉。由異步電動機的工作原理可知，要使電動機反向旋轉，需對調三根電源線中的兩根以改變定子電流的相序。因此實現電動機的正、反轉需要兩個接觸器

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