Electromagnetic relays are fundamental components in modern electrical and electronic systems, serving as switches that control the flow of electricity in various applications. These devices rely on the magnetic field generated by an electric current to operate a mechanical switch, which in turn opens or closes electrical contacts. The versatility, reliability, and efficiency of electromagnetic relays have made them indispensable in industries ranging from automation and telecommunications to power systems and consumer electronics.
Working Principle of Electromagnetic Relays The working principle of an electromagnetic relay is based on the interaction between electricity and magnetism. When an electric current flows through the coil of the relay, it generates a magnetic field around the coil. This magnetic field causes a movable armature to either attract or repel, depending on the direction of the current. The movement of the armature operates a set of electrical contacts, opening or closing them to control the flow of power in a circuit. The relay consists of several key components： Coil (Electromagnet)： The coil is the central part of the relay. When current passes through it, it becomes an electromagnet and creates a magnetic field.