I'm looking to potentially build my own small solenoids, I thought perhaps that I could take an Air core inductor, a spring, piece of plastic, and conductive core and build my own. Is there a way to determine force based on inductance and current (or power).
Answer
Force calculation:
\$F=(N*I)^2\mu_0\dfrac{A}{(2g^2)}\$
Where:
\$\mu_0=4\pi*10^{-7}\$
\$F\$ is the force in Newtons
\$N\$ is the number of turns
\$I\$ is the current in Amps
\$A\$ is the area in length units squared
\$g\$ is the length of the gap between the solenoid and a piece of metal
From this calculator
Inductance calculation:
\$L=\dfrac{d^2*n^2}{18d+40l}\$
Where:
\$L\$ is inductance in micro Henrys
\$d\$ is coil diameter in inches
\$l\$ is coil length in inches
\$n\$ is number of turns.
From this calculator
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