Principle of electromagnetic contactor

The principle of the electromagnetic contactor is that when the electromagnetic coil of the contactor is energized, it will generate a strong magnetic field, causing the static iron core to generate electromagnetic attraction to attract the armature and drive the contact action: the normally closed contact is disconnected, and the normally open contact is closed. The two are linked. When the coil is de-energized, the electromagnetic attraction force disappears, and the armature is released under the action of the release spring to restore the contacts: the normally closed contact is closed, and the normally open contact is disconnected. In industrial electrical, there are many types of contactors, the current ranges from 5A to 1000A, and their usefulness is quite extensive. In electrical engineering, a contactor is an automatic switcher used to connect or disconnect a load-carrying AC/DC main circuit or a large-capacity control circuit. The main control object is a motor. In addition, it is also used for other electrical loads, such as electric heating. Adapters, welding machines, lighting equipment, and contactors can not only connect and cut off the circuit, but also have a low-voltage release protection function. The contactor has a large control capacity. Suitable for frequent operation and remote control. It is one of the important components in the automatic control system.