The stroke is the usable distance travelled by the plunger from its initial position to the end of travel. As the stroke is increased the force is reduced and vice versa.
6.1. Start of Stroke
This is the position of the plunger before it starts its travel. It is also the position when it returns upon conclusion of the complete cycle.
Usually, the correct solenoid for a given application is the smallest one that has adequate magnetic force.
Contrary to an alternating current (AC) solenoid, the power consumption of a direct current (DC) solenoid is independent of the position of the plunger. DC solenoids are also characterised by soft and hard operation. Inherently longer cycling times can be reduced by special circuitry. It is also possible to modify the stroke-force characteristics. High switching frequencies do not cause dangerously high thermal loads in DC solenoids; the maximum switching frequency is only limited by the pull-in and drop-out times.
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