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  • Dongguan Fangxiong Electric Co., Ltd. | Communication Relay | General Power Relay | Automotive Relay | Magnetic Holding Relay
  • Dongguan Fangxiong Electric Co., Ltd. | Communication Relay | General Power Relay | Automotive Relay | Magnetic Holding Relay
  • Dongguan Fangxiong Electric Co., Ltd. | Communication Relay | General Power Relay | Automotive Relay | Magnetic Holding Relay
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Dongguan Fangxiong Electric Co., Ltd.

Phone: 0769-85963872

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Industry NewsCurrent Location: Home- > Industry News

What is the principle of electromagnetic relay

点击率: Release time: 2018-04-13 14: 19: 45Click to rate:

The relay is an electromechanical switch. It uses enameled copper wire to wind a few hundred to thousands of turns on a round iron core. When a current flows in the coil, the round iron core generates a magnetic field. The iron plate of the contact piece is sucked, which makes it open the first contact and make the second switch contact. When the coil is de-energized, the core loses its magnetism. Due to the elastic effect of contacting the copper sheet, the iron plate leaves the core and resumes the connection with the first contact. Therefore, a small current can be used to control the switches of other circuits. The entire relay is protected by a plastic or plexiglass dust cover, and some are fully sealed to prevent electrical oxidation.

As shown in the figure above, when the switch K in the control circuit is closed, the electromagnet has magnetism, the armature is sucked down, the relay contact is contacted, and the power circuit connected to the contact is turned on; when the control switch K is turned off At that time, the magnetism of the electromagnet is cancelled, the relay contacts pop open, and the power circuit is also disconnected.

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