GM515B
Magnetic properties toroidal boxed magnetic cores from amorphous and nanocrystalline alloys
GAMMAMET® 515B
Magnetic cores GAMMAMET® 515B 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 Co. After thermal processing in a cross-section magnetic field magnetic cores have high linearity of a curve of magnetization, a low residual and low specific magnetic losses.
Magnetic cores may be produced with any standard sizes with external diameter up to 140 mm, with internal diameter not less than 8 mm, proportional 5 mm at height and are delivered in protective containers.
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® 515B replace soft magnetic alloys Fe- and Ni- alloys and ferrite with a linear curve of magnetization. Next table of magnetic parameters is agreed with specifications ТУ 1261-030-12287107-2007:
| Magnetic core | Squareness ratio Kp800, not less | Coercive force, A/m, not more | Magnetic induction В800, T, not less |
|---|---|---|---|
| GM 515B | 0,05 | 4 | 0,9 |
Use area: high frequency transformers, pulse transformers, match transformers, broadband transformers, measuring transformers of a current and voltage.
GAMMAMET® owns following patents of Russia which are used at manufacture of magnetic cores GM515B: 2187573, 2190275.
The detailed information about magnetic properties of GM515B can be found in the book: Starodubtsev J.N., Belozerov V.J. "Magnetic properties amorphous and nanocrystalline alloys"
| Magnetic induction of saturation B800 | 0,95 T |
|---|---|
| Initial relative magnetic permeability | 1500 |
| Maximum permeability | 1550 |
| Coercive force | 1,5 A/m |
| Squareness ratio Br/B800 | <0,01 |
| Saturation magnetostriction | <0,2×10-6 |
| Specific electroresistance | 1,3×10-6 Om×m |
| Density | 7900 kg/m3 |
| Curie temperature | 500°C |
| Specific magnetic losses at frequency3<f<200 kHz | |
| P = 5,4×10-6f1,8Bm2 (W/kg) | |
| f – frequency (Hz), Вm – maximal magnetic induction (T) | |
Loop of a magnetic hysteresis
Curves of magnetization
Magnetic permeability
