electromagnetic relay

The working principle of electromagnetic relay is ： When the coil is energized , The iron core is magnetized to produce enough electromagnetic force , Suck the armature and drive the reed , Make the moving contact and the static contact close or separate , That is, the originally closed contact is disconnected , The original open contact is closed ; When the coil is de energized , Electromagnetic suction disappears , The armature returns to its original position , The moving contact and the static contact return to the original closed or separated state . When applied, just connect the circuit to be controlled to the contact , The relay can be used to achieve the purpose of control .

The excellent relay mode of electromagnetic relay generally belongs to physical contact mode , Therefore, the observation conditions for relay action in use are generally good , However, the process from electromagnetic generation to adsorption switching on requires a certain amount of time , It is not applicable to working conditions with high requirements for time accuracy .

Electromagnetic relay is one of the commonly used relay types , It is often used in equipment control nodes that do not need to consider electromagnetic interference , Appear as the secondary control node of the equipment , It can realize semi-automatic switch closing operation . It has a wide range of applications . The price and cost are relatively excellent , But because of its electromagnetic characteristics , Some working conditions requiring anti magnetic field need to be used with caution .