B66371 datasheet(9/12 Pages) EPCOS

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Ferrites and accessories

Symbols and terms

10/24

L/L

Relative inductance change

Inductance of coil without core

Main inductance

Parallel inductance

Lrev

Reversible inductance

Series inductance

Effective magnetic path length

Average length of turn

Number of turns

PCu

Copper (winding) losses

Ptrans

Transferrable power

Relative core losses

mW/g

Performance factor

Quality factor (Q =

L/Rs = 1/tanL)

Resistance



RCu

Copper (winding) resistance (f = 0)



Hysteresis loss resistance of a core



Rh

Rh change



Internal resistance



Parallel loss resistance of a core



Series loss resistance of a core



Rth

Thermal resistance

K/W

Effective loss resistance of a core



Total air gap

Temperature

°C

T

Temperature difference

Curie temperature

°C

tTime

Pulse duty factor

tan



Loss factor

tan

L

Loss factor of coil

tan

r

(Residual) loss factor at H

 0

tan

e

Relative loss factor

tan

h

Hysteresis loss factor

tan

i

Relative loss factor of material at H

 0

RMS value of voltage

Peak value of voltage

Effective magnetic volume

mm3

Complex impedance



Normalized impedance |Z|n = |Z| /N2   (le/Ae)

mm

Symbol

Meaning

Unit

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