GM11DC
Magnetic properties of toroidal encapsulated magnetic cores from amorphous and nanocrystalline alloys
GAMMAMET® 11DC
Magnetic cores GAMMAMET® 11DC are made from 25 microns thick ribbon of soft magnetic amorphous alloy on a Co–basis. The ribbon is produced by technology of molten metal rapidly quenching. Magnetic cores have high initial permeability and low core losses. Over a core the covering from polymer material is put. The encapsulated cores have enhanced strength and can be used without protective boxes.
The various sizes of cores are available with outer diameter up to 600 mm. Magnetic cores GAMMAMET® 11DC are preferably used in frequency range up to 200 kHz.
Sizes list of magnetic cores DC you can see in Table 2. Weight and geometrical sizes of toroidal encapsulated magnetic cores
Class of thermal stability is A (105°C).
The service life of cores is 30 years.
Magnetic cores GAMMAMET® 11DC substitute for cores of soft magnetic nickel-iron alloys and ferrites. The specification TU 1261-031-12287107-2008 assures the following initial permeability:
| Magnetic core | Initial relative magnetic permeability, no less | ||
|---|---|---|---|
| 1 class | 2 class | 3 class | |
| GM 11DC | 30000 | 50000 | 70000 |
The order is in full carried out on the magnetic cores GM 11DC – 1 class. More high-class cores choose from current production.
Use area: high-frequency transformers, measuring current transformers, matching transformers, magnetic modulators, high sensitive sensors.
GAMMAMET® owns following patents of Russia which are used at manufacture of magnetic cores GM11DC: 2009246, 2009248, 200949.
The detailed information about magnetic properties of GM 11DC can be found in the book: Starodubtsev J.N., Belozerov V.J. "Magnetic properties amorphous and nanocrystalline alloys"
Numerical values of magnetic properties in DC magnetic cores correspond to geometric cross-sectional area or volume of a core. And thus in electrotechnical calculations the lamination factor of core is accepted to equal unit.
| Magnetic induction of saturation В800 | 0,32 T |
|---|---|
| Initial relative magnetic permeability | 50000 |
| Maximal relative magnetic permeability | 150000 |
| Coercive force | 0,4 A/m |
| Squareness ratio Вr/В800 | 0,5 |
| Saturation magnetostriction | <0,2×10-6 |
| Specific electroresistance | 1,4×10-6 Om×m |
| Density | 5400 kg/m3 |
| Curie temperature | 160°C |
| Specific core losses at frequency f<3000 kHz | |
| P=2,2f1,2Bm2 (W/m3) | |
| Specific core losses at frequency 3000<f<200000 kHz | |
| P=0,025f1,8Bm2,2 (W/m3) | |
| f - frequency (Hz), Вm - maximum magnetic induction (T) | |
Loop of a magnetic hysteresis
Curves of magnetization
Magnetic permeability
