Solenoids: Generating a Controlled Magnetic Field
How Solenoids WorkA solenoid consists of a coil and a movable iron core called the armature. When current flows through a wire, a magnetic field is set up around the wire. If we make a coil of many turns of wire, this magnetic field becomes times stronger, flowing around the coil and through its center in a doughnut shape.
When the coil of the solenoid is energized with current, the core moves to increase the flux linkage by closing the air gap between the cores. The movable core is usally spring-loaded to allow the core to retract when the current is switched off. The force generated is approximately proportional to the square of the current and inversely proportional to the square of the length of the air gap. Jameco offers a variety of solenoids, which transform an electrical input signal into motion, in a range of sizes and voltages. There are many applications in today's industries where different magnetic fields, coils resistance and amps are needed.
Open Frame Solenoids
ReliaPro Tubular Pull Solenoid