TERMINOLOGY



Ferrites: list of parameters Initial magnetic permeability
Ferrites: list of parameters Top marginal loop hysteresis
Ferrites: list of parameters Residual induction
Ferrites: list of parameters Coercive force
Ferrites: list of parameters loss rate
Ferrites: list of parameters Relative tangent of the magnetic loss
Ferrites: list of parameters resistivity
Ferrites: the list of the parameters Relative temperature coefficient of the initial magnetic permeability
Ferrites: list of parameters the Curie Point
Ferrites: list of parameters Density
Ferrites: list of parameters Losses in the core
Ferrites: list of parameters Ratio of primary inductance
Ferrites: list of parameters Effective parameters of core



Ferrites: list of parameters Initial magnetic permeability, µn:
this is a limit described by the expression:
initial magnetic permeability ferrites
where:
µo–the magnetic permeability of vacuum (4px107of the A/m);
H–the tension of alternating magnetic field;
B–the value of the magnetic induction on the alternating current.
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Ferrites: list of parameters Top limit of the hysteresis loop, Bs:
a value of the magnetic induction in conditions of saturation, remaining practically constant at the further increase of the values of tension переменого of the magnetic field (Fig. 1.).
the top limit of the hysteresis loop ferrite
Fig. 1.
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Ferrites: list of parameters Residual induction, Br:
a value of the magnetic induction after the removal of the magnetic field under the condition of cao of the magnetization reversal of a ferromagnetic (Fig. 1.).
residual induction ferrite
Fig. 1.
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Ferrites: list of parameters Coercive force, He:
the tension He of the magnetic field, in which the ferromagnetic sample, initially magnetized up to saturation, размагничивается (Fig. 1.).
coercive force ferrite
Fig. 1.
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Ferrites: list of parameters Loss factor tanδ:
the Amount of losses on hysteresis and eddy currents
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Ferrites: list of parameters Relative tangent of the angle of the magnetic losses, tan δ/µn
the Ratio of the coefficient of losses to the initial magnetic permeability
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Ferrites: list of parameters Resistivity, ρ
The electrical resistance of the material length of 1 m and cross-sectional area of 1 m2
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Ferrites: list of parameters Relative temperature coefficient of the initial magnetic permeability, αµ
The dependence of the initial magnetic permeability of temperature, defned by the expression:
relative temperature coefficient of the initial magnetic permeability ferrites
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Ferrites: list of parameters The Curie Point
the Critical temperature at which ferromagnetics pass in парамагнетики (Fig. 2.)
the Curie point for ferrites
Fig. 2.
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Ferrites: list of parameters Density, δ:
the Ratio of the mass (W) to the volume (V):
the density of ferrites
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Ferrites: list of parameters Losses in the core, Pe:
Loss in a closed магнитопроводе when the value of induction, determined by expression:
losses in ферритовом core with induction B
where:
V–the voltage drop on the side of a magnetic core, Volts;
f–ac frequency, Hz;
N–the number of turns;
Ae–effective cross-section of the core, cm2.
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Ferrites: list of parameters Ratio of primary inductance (одновитковая inductance) – A1
the Ratio of the measured values of inductance (H) to the square of the number of turns.
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Ferrites: list of parameters Effective parameters:
C1: permanent core;
le: the effective length of the magnetic path, cm;
Ae: effective cross-section of the core, cm2and
Ve: the effective capacity of the core, cm3.