Summary
Highlights
Introduction to Solenoids00:00:00
A solenoid is an output device that converts electrical energy into linear mechanical force. They are essential components in many residential devices like washing machines and doorbells, functioning via an electromagnetic coil.
Operation of Plunger Solenoids00:00:41
Plunger solenoids use an internal iron rod. When current flows, the magnetic field pulls the rod into the coil, moving contacts to a closed position. When the current stops, a spring returns the rod to its resting state.
Mechanism of Metallic Arm Solenoids00:01:37
Solenoids can also use a metallic arm to close a switch. When energized, the magnetic field pulls the arm toward the core, connecting contacts to energize a secondary circuit.
Understanding Electromechanical Relays00:02:24
When a solenoid is used to control contacts in another circuit, it is called an electromechanical relay. Relays are vital for isolating low-power signals from high-power circuits or controlling multiple circuits with one signal.