  # Inductor Calculator

by
Wenton L. Davis  ## Welcome to Thought Mountain's Inductor Calculator!

An inductor is a coil of wire around some core.  Inductance, L (measured in Henries, H), is the measure of a magnetic field created by a current flowing through a coil of wire.  The properties of an inductor include:

 µ Permeability The permeability is how much the core will allow lines of flux to compress inside of it.  It is measured in Henries per meter (H/m).  When researching permeability, some tables will show µ while other tables will show µr, which is the "relative permeability."  The relative permeability is relative to the permeability of a vacuum, µo=4πx10-7=1.2566x10-6. N Number of turns The number of turns of wire around the core. A Cross-sectional area The area of the core as a cross-section, measured in square meters, m2 l Length of the coil The length of the coil, measured in meters, m. Interesting question: what happens when the length of the coils of wire is significantly less than the length of the core?

L=µN2A/l   Inductor design

Design your inductor based on physical parameters:

 µ: Core material: Free space; µr=1.000 Air; µr=1.000 Iron; µ=6.53x10-3; µr=5200 Steel; µ=8.80x10-3; µr=7000 Other: µ= or µr= N: turns A: m2 l: m   Reach me by email (wenton@ieee.org)