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The working principle of Electromagnetic Power Relay

by Huyu 05 Jan 2022 0 Comments
When a certain voltage or current is applied to both ends of the electromagnetic relay coil, the magnetic flux generated by the coil passes through the magnetic circuit composed of the iron core, the tie iron, the armature and the working air gap of the magnetic circuit. Under the action of the magnetic field, the armature is attracted to the pole face of the iron core, Therefore, the normally closed contact of the contact is pushed to be disconnected, and the normally open contact is closed; when the voltage or current at both ends of the coil is less than a certain value, and the mechanical reaction force is greater than the electromagnetic attraction force, the armature returns to the initial state, and the normally open contact is disconnected. Normally closed contacts are on.
When a certain voltage or current is applied to both ends of the electromagnetic relay coil, the magnetic flux generated by the coil passes through the magnetic circuit composed of the iron core, the tie iron, the armature, and the working air gap of the magnetic circuit. Under the action of the magnetic field, the armature is attracted to the pole face of the iron core. Thereby, the normally closed contact of the contact is pushed to be disconnected, and the normally open contact is closed; when the voltage or current at both ends of the coil is less than a certain value, and the mechanical reaction force is greater than the electromagnetic attraction force, the armature returns to the initial state, and the normally open contact is disconnected. Normally closed contacts are on.
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