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OpenSpecEngineering

Open data for a field built on precision

Solenoid Force

Attractive (pull-in) force of an electromagnet across an air gap, from the magnetic circuit energy method: F = (NI)²·μ₀·A/(2g²). Valid for the simplified case of a single air gap with negligible core reluctance and no fringing.

N, I g (air gap) F
Coil pulls the armature across the air gap g toward the core.

Solution

History