Ceramic Magnetics, Inc. A THOMAS & SKINNER COMPANY 16 Law Drive • Fairfield, New Jersey 07004 • USA Phone: (973) 227 4222 • Fax: (973) 227 6735
Magnetic Design Formulas
Peak Flux Density:
B E f N Ae
= = = = =
Peak flux density [G] RMS sine wave voltage [V] Frequency [Hz] Number of turns Effective area [mm2]
Peak Magnetizing Force (Magnetic Flux Intensity):
H N Ip le
= = = =
Peak magnetizing force [Oe] Number of turns Peak current [A] Magnetic path length [mm]
Inductance:
L µi N C1
Inductance [µH] Initial permeability Number of turns Core constant [mm-1]
L µi OD ID HT N
= = = = = =
Inductance [µH] Initial permeability Core outer diameter [mm] Core inner diameter [mm] Core height [mm] Number of turns
AL L N
= = =
Inductance factor [nH] Inductance [µH] Number of turns
Conversion Factors:
1 G
=
10-4 T
1 Oe
79.58 A/m
1 in
25.4 mm
1 µH
10-6 H
1 nH
10-9 H
