GEEPLUS Inc. Three Position Solenoid C3PF Series

The 3-position solenoid allows a mechanism to be moved accurately to 3 stable points. For selection mechanism, this permits higher functionality to be achieved withing a restricted space. The most common (standard) configuration is center-neutral type which is described. In the de-energized condition the armature is moved to the center position by springs. If Coil 1 is energized, the armature moves out to the maximum extension, if Coil 2 is energized, the armature moves in the the minimum extension. Because all 3 positions are controlled by mechanical stops, they are highly repeatable. The solenoid comprises of two separate coil assemblies mounted end-to-end which move the armature to either end-position when energized, and a spring operated centering mechanism. The centering mechanism provides a positive center position from which the armature will not move until deflection force exceeds the spring preload, this it will not shift with small changes in load. Control of the solenoid requires only two switches to regulate power applied to either coil. To achieve similar function with a conventional solenoid, two solenoids would be required, plus a complex spring and linkage mechanism. To use a motor to achieve similar function, gearing and position sensing would be required, plus a more complex drive circuit. The 3-position solenoid can be produced n open-frame construction, or in tubular construction. Three different spring options are offered for most types. Option A is standard and will work with any duty cycle. Options B and C have stronger springs and will generally only work at intermittent duty cycle.