GM414
Magnetic properties toroidal boxed magnetic cores from amorphous and nanocrystalline alloys
GAMMAMET® 414
Magnetic cores GAMMAMET® 414A are made of a ribbon by thickness 25 microns with nanocrystalline structure. The ribbon is produce by means of fast incandescence from an alloy on the basis of iron. The alloy has high initial magnetic permeability and induction of saturation, low coercive force and specific magnetic losses.
Magnetic cores may be produced with any standard sizes with external diameter up to 600 mm, with internal diameter not less than 8 mm, proportional 5 mm at height and are delivered in protective containers. Magnetic cores GAMMAMET® 414A it is preferable to use on frequency up to 100 kHz.
Sizes list of magnetic cores in protective containers you can see in Table 1. Weight and geometrical sizes of toroidal boxed magnetic cores
All magnetic cores have a class of thermal stability A (105°C). At will of the customer also magnetic cores may be produced with class F (155°C).
Full service life of magnetic cores - 30 years.
Magnetic cores GAMMAMET® 412А replace soft magnetic alloys Fe-, Ni- alloys and ferrite with a rectangular loop of a magnetic hysteresis. Next table of magnetic parameters is agreed with specifications ТУ 1261-030-12287107-2007:
| Magnetic core | Initial relative magnetic permeability, not less | Coercive force, A/m, not more | B800, T, not less | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 class | 2 class | 3 class | 1 class | 2 class | 3 class | 1 class | 2 class | 3 class | |
| GM 414 | 15000 | 45000 | 70000 | 2,5 | 2 | 1,5 | 1,15 | 1,15 | 1,15 |
In full the order may be carried out only for magnetic cores GM414 - 2 class. Magnetic cores of higher class are choose from available production.
Use area: Low and high frequency power transformers, measuring transformers of a current and voltage, broadband transformers, matching transformers.
GAMMAMET® owns following patents of Russia which are used at manufacture of magnetic cores GM414: 2009258, 2033649, 2117714.
The detailed information about magnetic properties of GM414 can be found in the book: Starodubtsev J.N., Belozerov V.J. "Magnetic properties amorphous and nanocrystalline alloys"
| Magnetic induction, В800 | 1,17 T |
|---|---|
| Squareness ratio Br/B800 | 0,6 |
| Saturation magnetostriction | 1,5×10-6 |
| Specific electroresistance | 1,25×10-6 Ом×m |
| Density | 7400 kg/m3 |
| Curie temperature | 600°C |
| Magnetic parameters | 1 class | 2 class | 3 class |
|---|---|---|---|
| Initial relative magnetic permeability | 30000 | 60000 | 90000 |
| Maximum permeability | 200000 | 300000 | 400000 |
| Coercive force | 1,4 | 1,0 | 0,6 |
| Specific magnetic losses P at frequency 3<f<200 kHz | 7,5×10-6f1,7Bm2 | 5,5×10-6f1,7Bm2 | 4,3×10-6f1,7Bm2 |
| In formulas for calculation of specific magnetic losses it is necessary to use frequency in Hz and the maximal in T then specific magnetic losses turn out in watts on kg. | |||
Set of static loops of a magnetic hysteresis
Dynamic curves of magnetization
By digits on curves designate frequency in kHz. The curve f = 0 corresponds to the basic curve of magnetization
Magnetic permeability at the maximal Bm = 0,01 T
Influence of temperature
