Electromagnetic lock adsorption induction principle

The working principle of electromagnetic lock itself

(or electromagnetic lock) is designed in the same way as electromagnet, which uses the principle of electromagnetism. When the current passes through the silicon steel sheet, the electromagnetic lock will generate a strong suction force to tightly absorb the adsorption iron plate to achieve the function of locking the door. Only a small current is needed for the electromagnetic lock to generate a huge magnetic force. The access control system that controls the power supply of the electromagnetic lock will cut off the power after the person is recognized correctly. The electromagnetic lock loses the suction force and the door can be opened. Because the electromagnetic lock does not have a complicated mechanical structure and the structure of the lock tongue, it is suitable for the passage control of escape doors or fire doors. The lock body is protected by the injection of epoxy resin (epoxy) inside. The suction strength of the electromagnetic lock is now indicated in LB (pounds), and the test method is static pressure. The so-called static pressure means that the electromagnetic lock gradually increases the pulling force on the adsorption iron plate after the electromagnetic lock is powered on. When it exceeds the suction force of the electromagnetic lock, the adsorption iron plate is instantly opened. The data of this pulling force is the pulling force value of the electromagnetic lock. In addition, the force between the electromagnetic lock and the adsorption iron plate must be face-to-face and linearly pressurized (collinear load test), so that the holding force of the electromagnetic lock is the largest. The adsorption iron plate may be magnetized for a short time due to the long-term magnetic induction of the electromagnet.

In order to avoid the failure of access control after power outage, you can choose a power supply with a backup battery, which can generally maintain a working time of 5-8 hours, enough to have a satisfactory time to deal with the control after the power outage. The design of the electromagnetic lock (or electromagnetic lock) is the same as the electromagnet. It uses the principle of electromagnetism. When the current passes through the silicon steel sheet, the electromagnetic lock will generate a strong suction force to tightly absorb the adsorption iron plate to achieve the function of locking the door.

Only a small current electromagnetic lock will generate a huge magnetic force. The access control system that controls the power supply of the electromagnetic lock will cut off the power after the person is recognized correctly. The electromagnetic lock loses the suction force and the door can be opened. Because the electromagnetic lock does not have a complicated mechanical structure and the structure of the lock tongue, it is suitable for the passage control of escape doors or fire doors. The lock body is protected by the injection of epoxy resin inside.