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课本中电磁继电器的结构和工作电路 :图 1 结构 :Ａ电磁铁 ;Ｂ衔铁 ;Ｃ弹簧 ;Ｄ动触点 ;Ｅ静触点。见图 1。工作原理 :电磁铁通电时 ,把衔铁吸下来 ,使Ｄ和Ｅ接触 ,工作电路闭合。电磁铁断电时失去磁性 ,弹簧把衔铁拉起来切断工作电路。优点 :低压电路的通断控制高压电路。?
The structure and working circuit of the electromagnetic relay in the textbook: Figure 1 Structure: A electromagnet; B armature; C spring; D moving contact; E static contact. see picture 1. Working principle: When the electromagnet is energized, the armature is sucked down to contact D and E, and the working circuit is closed. When the solenoid loses its power, it loses its magnetism. The spring pulls the armature to cut off the working circuit. Advantages: Low-voltage circuit on-off control high-voltage circuit. ?