Electromagnet has many advantages: the magnetism of the electromagnet can be controlled by the on and off current; the size of the magnetism can be controlled by the strength of the current or the number of turns of the coil; can also be controlled by changing the resistance to control the size of the current to control the size of the magnetism; the magnetic poles can be changed by the direction of the current to control, and so on. That is: the strength of the magnetism can be changed, the presence or absence of magnetism can be controlled, the direction of the magnetic pole can be changed, the magnetism can be due to the disappearance of the current and disappear. Electromagnet is an application of current magnetic effect (electrically generated magnetism), and life is closely linked, such as electromagnetic relays, electromagnetic cranes, magnetic levitation trains, electronic door locks, intelligent channel ramp, electromagnetic flow meter and so on.
(1) crane: for industrial use of powerful electromagnet, through the high current, can be used to lift steel plates, containers, scrap iron and so on.
(2)Telephone
(3)Ampere meter, volt meter, current checker
(4)Electric bell and so on.
(5) Automation control equipment
(6) Industrial automation control, office automation.
(7)Packaging machinery, medical equipment, food machinery, textile machinery and so on.
(8)Electromagnetic relay
(9)Magnetic levitation train