What is a relay and what is his working principle?

What is a relay and what is his working principle?

A relay is an electrical control device that is used in an electrical output circuit when the change in input (excitation) reaches the specified requirements.An appliance that causes a predetermined step change in the controlled quantity. It has the interaction between the control system (also known as the input loop) and the controlled system (also known as the output loop)relationship. Often used in automated control circuits, it is actually an “automatic switch” that uses small currents to control large current operation. Therefore, it plays a role in the circuit.Dynamic adjustment, safety protection, conversion circuit, etc.
The working principle of the relay generally refers to the electromagnetic relay, which is the kind of mechanical action. The essence of the relay is to use a loop (usually a small current) to control Another circuit (generally a large current) is turned on and off, and in this control process, the two circuits are generally isolated, and its basic principle is to use electromagnetic Effect to control the mechanical contact to achieve the purpose of switching, energizing the coil with the iron core – the coil current generates a magnetic field – the magnetic field absorbs the armature action on and off contact, the whole process is”Small current – magneto-mechanical – high current” is a process.

Zhejiang Feileisi Electrical Technology Co., Ltd. was established in 2008, is a professional manufacturer
of automotive relays, flashers, switches, Auto Relay,sensors, DC contactor, wiring harness and other automotive electrical
products.The company passed the ISO/TS16949: 2009 quality system certification in 2015. The products passed  inspection in the Ningbo auto parts testing center。


Post time: Jul-01-2019
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