The primary function of a solenoid is to convert electrical energy into mechanical motion through electromagnetic force. When an electrical current passes through the solenoid's coil, it generates a magnetic field that pulls or pushes a metal component called the armature. This movement is used to operate mechanical devices such as valves, switches, or relays.
This function is widely used in solenoid valves (for controlling the flow of air, gas, or liquid), locks, and other automated systems.
2. Switching Function:
Solenoids are also used as electrical switches. By moving the armature, the solenoid either opens or closes a set of contacts. This allows the solenoid to control circuits, such as turning a device on or off, or switching between different electrical pathways.
For example, in solenoid-controlled valves, the solenoid acts as a switch that opens or closes the valve to direct fluid flow when the solenoid is energized or de-energized.
In summary, the two main functions of a solenoid are:
Electromagnetic actuation to generate movement for mechanical tasks.
Switching function to control electrical circuits or components.