Electromagnatic SOLENOIDS

Electromagnetic Solenoids are electromagnetic switches with a movable core that converts current flow into mechanical movement.

• In a (pulling) type solenoid, the magnetic field pulls a core into a coil. These solenoids are called magnetic switches.
  A pull-in coil "pulls" the core into the coil, and a hold-in coil (holds) the core in place.

• In a (push-pull) type solenoid, a permanent magnet is used for the core. By changing the direction of current flow, the core is (pulled in) or (pushed out). A typical use is on electric door locks

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