Pulsed Power Toolbox

This is the start of a collection of Pulsed Power related formulas and calculators that I found usefull. However, whenever I could find resources on the internet already, I tried to refer to them rather than to re-invent the wheel. Consequently you might also find some of the links provided helpful.

calculators for nsPEF-exposure parameters

formulas for the calculation of common inductances

formulas for the calculation of common capacitances

calculation of rise times and peak currents for RCL-circuits

Formulas for the Calculation of Common Capacitances^*)

(unless otherwise noted use SI-units in all presented formulas)
^*) Of course no guarantee is given for the accuracy of the listed formulaes or the calculators although I tried my best to select the formulas carefully from the literature. Please let me know when you find any mistakes.

capacitance

formula

example

parallel plates

A >> d²:

long parallel strips

For w/d < 1:

For w/d > 1:

isolated disk

two spheres of equal size

isolated sphere

concentric spheres

ε_r: relative permittivity
of dielectric between spheres

coaxial cable

ε_r: relative permittivity
of dielectric between conductors

infinetly long, thin wire

For h>>r:

h	=	100	cm
r	=	0.5	mm

C	=	6.7	pF/m

thin wire of finite length

S-factor is computed automatically

(argument 2h/l or l/2h dpending on which is less than unity)

prallel wires over ground

prallel wires remote from ground

parallel wires of finite length
above ground

vertical aligned wires
parallel to ground

calculated like
"parallel wires over ground"
with h = (h₁+h₂)/2

single layer solenoid

N: number of turns

References:

1) F.E. Terman, Radio Engineers' Handbook, McGraw-Hill, New York, 1943.