Material Properties
Characteristics of iron powder core:
So as to obtain a new metallic powder core with constant permeability and low core loss up to higher frequency range, we have tried to prepare the amorphous alloy powder cores by using the Fe[70]Al[5]Ga[2]P[9.65]C[5.75]B[4.6]Si[3] glassy alloy powders that have a wide supercooled liquid region (ΔTx) below crystallization temperature (Tx). The iron powder core had a constant permeability of about 110 up to 10 MHz, and a lowest core loss of 610 kW/m3 at Bm = 0.1 T and f = 100 kHz in any other metallic powder cores. These excellent magnetic properties of the iron powder core in a higher frequency range are presumably due to an extremely low coercive force (He) derived from sufficient elimination of internal stress by annealing at near the ΔTx and its higher electrical resistivity (p) of about 1.60 µΩm for the Fe[70]Al[5]Ga[2]P[9.65]C[5.75]B[4.6]Si[3] glassy alloy. For the excellent magnetic properties of the iron powder core, therefore, allows us to expect that this toroidal core will be suitable for high frequency drive magnetic devices such as a choke coil, reactor and so on.
1.MATERIAL PROPERTIES OF THE IRON POWDER CORE
Characteristics \ Material | 35 | 55 | 75 | 22 | 33 | 60 | 75a |
---|---|---|---|---|---|---|---|
Permeability µ | 35 | 55 | 75 | 22 | 33 | 60 | 75 |
Temp.Coef.of Perm(+ppm/oC) |
250 | 360 | 825 | 410 | 600 | 950 | 650 |
Color Code | Yellow/red | Green/red | Yellow/white | Gray/green | Gray/yellow | Green/yellow | Green/blue |
2.SIZE TOLERANCE(mm) OF THE IRON POWDER CORE
Yuxiang Part Number | OD(mm) | ID(mm) | Ht(mm) |
---|---|---|---|
YT30-YT38 | ±0.35 | ±0.35 | ±0.35 |
YT44-YT72 | ±0.50 | ±0.50 | ±0.50 |
YT80-YT141 | ±0.50 | ±0.50 | ±0.60 |
YT150-YT225 | ±0.60 | ±0.60 | ±0.75 |
YT249-YT300 | ±0.75 | ±0.75 | ±0.75 |
3.MATERIAL PROPERTIES OF OTHER METALLIC POWDER CORE
Type | Material | µ | Q | Temp.Coeff. (-65~125) oC (ppm) | Density (g/cm3) | Grey Color | Bs (Gs) | Inductance coeff. Tolerance Al |
---|---|---|---|---|---|---|---|---|
T3H | FeNi50 | 60 | ≥20 | ≤300 | 7.6 | Blue | 13000 | ±15% |
T4H | FeNi50 | 125 | ≥5 | ≤300 | 7.6 | Blue | 13000 | ±15% |
SHAPE
SYMBOL AND FORMULA
Le - Effective magnetic path length(cm)
N - Winding turns
AL -Inductance rated value (nH/N2)of one core,during frequency
10KHz and AC flus density 10 gauss(lmT)
L - Inductance
µe - Effective Permeability
π - 3.14