EM Shield Calculator
Industrial/Aerospace/Military Specifications
Designs by the inventor of the Slotless Wide Airgap Motor
Concentric Cylindrical Magnetic Shields with Conductive Interleaves
with One Cylinder
D
s
shield inside diameter
cm
L
s
shield length
cm
t
1
magnetic shield thickness
cm
µ
r1
initial permeability of magnetic shield
f
field frequency
Hz
r
1
inside radius of equivalent sphere
cm
R
o1
radius of equivalent sphere
cm
R
o1
/r
1
R1
shield outside radius
cm
Bo/Bs
interior attenuation with first magnetic shield
db
with Two Cylinders
c
2
conductive interleave shield thickness
cm
rho
interleave resistivity
Ohms cm
t
2
magnetic shield thickness
cm
µ
r2
initial permeability of magnetic shield
eps
skin depth
cm
R
o2
radius of equivalent sphere
cm
R
o2
/r
1
R2
shield outside radius
cm
Bo/Bs
interior attenuation with second magnetic shield
db
with Three Cylinders
c
3
conductive interleave shield thickness
cm
rho
interleave resistivity
Ohms cm
t
3
magnetic shield thickness
cm
µ
r3
initial permeability of magnetic shield
eps
skin depth
cm
R
o3
radius of equivalent sphere
cm
R
o3
/r
1
R3
shield outside radius
cm
Bo/Bs
interior attenuation with third magnetic shield
db
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