Electromagnetic switch, as the name suggests, is a switch controlled by electromagnet, that is, the combination of electromagnet and switch. When the electromagnetic iron coil is energized, it will generate electromagnetic force, and the movable iron core will push or pull the switch contact to close, so as to connect the controlled circuit. Electromagnetic switches are widely used in various industries. The most common one is the contactor in the industrial field. The electromagnetic switch is the control switch on the starter and one of the three major components of the starter (DC motor, transmission meshing mechanism and electromagnetic switch). Its working principle is that the coil generates electromagnetic suction after being energized to move the movable iron core. On the one hand, the transmission meshing mechanism is pulled to move the starter pinion forward to mesh with the engine flywheel ring gear. On the other hand, the switch contact is pushed to connect to power on the DC motor for operation, this will drive the engine to start.

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