TERMINOLOGY
| SYMB. | DESCRIPTION |
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H
|
Magnetic Field Strength |
|
The externally applied magnetizing force that induces magnetic flux in a magnetic material. |
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Hs
|
Saturation Field Strength |
|
The magnetic force (H) needed to achieve saturation. |
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Hc
|
Coercive Force |
|
The magnetic force required to reduce the magnetic induction (Br) to zero. |
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B
|
Flux Density |
|
The flux per unit area induced by a field strength (H). |
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Bs
|
Saturation |
|
The value of magnetic flux density atl saturation. |
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Br
|
Remanance |
|
The residual magnetic induction (B) in a material after the magnetizing force (H) is reduced to zero. |
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m
|
Permeability (relative) |
|
The capacity of a material to conduct a magnetic flux in relation to air. (Air is assumed to have permeability of 1), or the magnetic flux (B) divided by the magnetic force (H). |
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|
mi
|
Permeability (initial) |
|
The relative permeability at very low magnetic field strength. |
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me
|
Permeability (effective) |
|
The relative permeability of a core including any air gaps. |
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map
|
Permeability (apparent) |
|
The inductance of a winding with a core divided by the inductance of the same winding without the core. (map=L/Lo) |
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AL
|
Inductance Factor |
|
The inductance in nH of 1 turn. (B< 0,25 mT or 2,5 Gauss) |
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Tc
|
Curie Temperature |
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The temperature at which the material looses all of its magnetic properties. Permeability falls to 1, that of free air. |
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Le
|
Effective Length of Magnetic Field |
|
The length that the magnetic flux takes through a core. |
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Ae
|
Effective Area |
|
The normalized core area perpendicular to the magnetic flux. |
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Ve
|
Effective Volume |
|
The effective magnetic volume of a core. |
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S
I/A
|
Core Factor |
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TF
|
Temperature Factor |
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DF
|
Disaccommodation Factor |
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PP
|
Core Loss (power) |
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hB
|
Hysteresis Constant |
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r
|
Density |
|
tan
d/mi
|
Dissipation Factor |