1785-L60L
1785-L60L
吸引型電磁系儀表的工作原理如圖3-4所示。當被測電流通過固定線圈時,在線圈的附近就產生磁場,其方向可用右手螺旋定則判定.在磁場中,可動鐵片被磁化.由于磁化方向與磁場方向相同,使可動鐵片靠近線圈一端的極性恰與線圈右側的極性相反,從而對可動鐵片產生吸引力[見圖3-4(a)],形成轉動力矩,帶動指針偏轉.當轉動力矩與游絲所產生的反作用力矩相等時,指針便停止在某一平衡位置,指示出被測電量(電流或電壓)的大小.當固定線圈中的電流方向改變時[見圖3-4(b)],磁場方向和可動鐵片的極性同時跟著改變,吸引力的方向不變,故指針偏轉的方向也就不會隨電流方向的不同而改變.可見,這種儀表既可用來測量交流電量,又可用于直流測量.
◆ 企業(yè)名稱:廈門泰尼電氣有限公司
◆ 主營業(yè)務:DCS,PLC
◆ 經營模式: 貿易
◆ 貿易地區(qū): 全國
◆ : 小黃《女士》
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