Goto: Inductance Output Format Notes

Equation Parameters Diagram

Parameter Value Units Special Values Inputs: R (coil radius) inches meters centimeters millimeters micrometers nanometers feet mils yards miles kilometers lightyears angstrom (Å) astronomical unit (AU) fermi (fm) micron (um) nautical mile (nmi) parsec (pc) statute mile (mi) yard (yd) ____________________ H (coil height) inches meters centimeters millimeters micrometers nanometers feet mils yards miles kilometers lightyears angstrom (Å) astronomical unit (AU) fermi (fm) micron (um) nautical mile (nmi) parsec (pc) statute mile (mi) yard (yd) ____________________ N (# of turns) Outputs: L (inductance) nH, nanohenrys H, Henrys mH, millihenrys uH, microhenrys pH, picohenrys ____________________ l (wire length) inches meters centimeters millimeters micrometers nanometers feet mils yards miles kilometers lightyears angstrom (Å) astronomical unit (AU) fermi (fm) micron (um) nautical mile (nmi) parsec (pc) statute mile (mi) yard (yd) ____________________ P (coil pitch) inches meters centimeters millimeters micrometers nanometers feet mils yards miles kilometers lightyears angstrom (Å) astronomical unit (AU) fermi (fm) micron (um) nautical mile (nmi) parsec (pc) statute mile (mi) yard (yd) ____________________

L (inductance)

Select Format: Scientific Engineering Fixed

Inductance is an empirical approximation AFAIK Note that L doesn't depend on wire diameter! Assumes a coil with only a few turns Bruce Weber has compared this formula to one in Lorrain and Corson (E&M textbook) and found agreement when coil length > coil radius. Sources: Inductance from Amateur Radio Handbook My own formulae for length!

Copyright ©2006 Raymond J. Allen