B64290P0709 Datasheet, PDF (5/7 Pages) TDK Electronics – Ferrites and accessories

Ferrites and accessories
Symbols and terms
Symbol
ΔL/L
L₀
L_H
L_p
L_rev
L_s
l_e
l_N
N
P_Cu
P_trans
P_V
PF
Q
R
R_Cu
R_h
ΔR_h
R_i
R_p
R_s
R_th
R_V
s
T
ΔT
T_C
t
t_v
tan δ
tan δ_L
tan δ_r
tan δ_e
tan δ_h
tan δ/μ_i
U
Û
V_e
Z
Z_n
Meaning
Relative inductance change
Inductance of coil without core
Main inductance
Parallel inductance
Reversible inductance
Series inductance
Effective magnetic path length
Average length of turn
Number of turns
Copper (winding) losses
Transferrable power
Relative core losses
Performance factor
Quality factor (Q = ωL/R_s = 1/tan δ_L)
Resistance
Copper (winding) resistance (f = 0)
Hysteresis loss resistance of a core
R_h change
Internal resistance
Parallel loss resistance of a core
Series loss resistance of a core
Thermal resistance
Effective loss resistance of a core
Total air gap
Temperature
Temperature difference
Curie temperature
Time
Pulse duty factor
Loss factor
Loss factor of coil
(Residual) loss factor at H → 0
Relative loss factor
Hysteresis loss factor
Relative loss factor of material at H → 0
RMS value of voltage
Peak value of voltage
Effective magnetic volume
Complex impedance
Normalized impedance |Z|_n = |Z| /N² × ε (l_e/A_e)
5 07/14
Unit
H
H
H
H
H
H
mm
mm
W
W
mW/g
Ω
Ω
Ω
Ω
Ω
Ω
Ω
K/W
Ω
mm
°C
K
°C
s
V
V
mm³
Ω
Ω/mm