Principle of electromagnetic door lock

- Apr 30, 2019-

The magnetic lock, also called the suction lock, generates a huge magnetic force after the power is applied. Any object with an iron is attracted, and the size of the magnetic force is more related to the contact area. The suction force of the iron object is larger. The more fully, it is not easy to pull open. The magnetic force is converted into magnetic force. The magnetic force itself is a force. Then the force has the size and the size of the magnetic force. It can be designed according to the needs, so the electromagnetic lock is also powerfully limited in terms of setting. There are 180kg, 280kg, 380kg, etc. This magnetic force, if we have enough strength, can also pull the magnetic force away, that is, the electromagnetic lock is separated.


The design of the electromagnetic lock (or electromagnetic lock) is the same as that of the electromagnet. It uses the principle of electromagnetism. When the current passes through the silicon steel sheet, the electromagnetic lock will produce a strong suction force and tightly attract the adsorption iron plate to achieve the effect of locking the door. . A very small current will also cause a large magnetic force to be generated by the electromagnetic lock. The effective control of the access control system of the electromagnetic lock power supply will be powered off, and the electromagnetic lock will lose its suction to open the door. Because the electromagnetic lock has no complicated mechanical structure and the structure of the bolt, it is suitable for the passage control of the escape door or the fire door. The inside of the lock body is protected by infusion of epoxy. At present, the suction strength of the electromagnetic lock is expressed in lb (lbs), and the test method is static pressurization. The so-called static pressurization is to gradually increase the pulling force on the adsorbed iron plate after the electromagnetic lock is energized. When the suction force of the electromagnetic lock is exceeded, the adsorbed iron plate is pulled open instantaneously, and the data of the pulling force is the pulling force value of the electromagnetic lock. Moreover, the force of the electromagnetic lock and the absorbing iron plate must be face to face and a collinear load test, so that the holding force of the electromagnetic lock is the largest. The adsorbed iron plate may be temporarily magnetized because of the magnetic induction of the electromagnet for a long time.