MSSN series saturable toroidal cores, made of thin (25 +- 5microns) Fe-based nanocrystalline ribbon represent a new class of production with unique properties. They complement the long-standing saturable cores of the Co-based amorphous alloy, traditionally used for high-quality multi-channel power supplies based on magnetic amplifiers.

 

By careful materials and thermomagnetic treatment modes selection they achieve excellent soft magnetic properties at high (up to 300 kHz) operating frequencies (coercivity and losses are close to the characteristics of Co-based amorphous alloys) in combination with very high saturation induction - 1.2 T, typical for Fe-based alloys. In addition, a new soft magnetic material with square hysteresis loop has very high squareness ratio, its thermal stability is higher than that of amorphous materials, as well as increased operating temperatures (up to 120 ° C). The specific properties of new materials contribute to the reliability of magnetic amplifiers circuits, improve their performance and minimize size.

 

CONFIGURATION:

Ribbon wound magnetic core is placed into hard protective container of glass-polyamide and mechanically fixed with silicone sealant.The container has rounded edges and is designed for direct winding of a thick wire. The container provides reliable mechanical protection and preservation of amorphous material's properties. All materials comply with UL94V-1 / 0.

 

KEY FEATURES OF THE MATERIAL:

  • Induction amplitude, Bm (25°C) 1.2 T
  • Induction amplitude, Bm (90°C) 1.098 T
  • Squareness ratio Br/Bm (@ 100 kHz, 80A/m), at least 0.97
  • Squareness ratio Br/Bm (@ 1 kHz, 80A/m), at least 0.93
  • Ore power loss rating (@ 50 kHz, 0.4 T), no more than 130 W/kg
  • Curie temperature, Tc 570°C
  • Operating temperature range -60°C ... 120°C
  • Saturation magnetostriction (@ 25°C) less than 0.5´10^-6

 

ADVANTAGES:

  • High squareness (magamp choke dead time reduction and improved adjustment mode)
  • Very high saturation induction (choke size reduction)
  • Low coercitive force (reduction in reverse recovery current and overheating control components)
  • Low core loss (increasing operating frequencies)
  • Increased maximum operating temperature: up to 120°C (operation at high frequencies)

 

APPLICATION:

  • Magamps for SMPS
  • Magamps for DC/DC converters
  • Computer power supplies
  • Pulse transformers
  • Saturable transformers for self-exciting invertors
  • Other saturable applications

 

ENTRY EXAMPLE:

MSSN-10B-L, where:

  • MS – MSTATOR;
  • S – application (saturable);
  • N – material reference code;
  • 10 – outer diameter in mm;
  • B – cross section reference code;
  • L – thermal treatment type (longitudinal field).

 

DIMENSIONS AND KEY FEATURES:

TYPE

Dimensions, mm

(O.D. – I.D. - H)

Mean line length

Lm, cm

Cross-section

Ac, cm2

Window area Wa, cm2 WaAc, cm4

Weight,

gr

B-H loop parameters @ F=100 kHz,

Hm=1 Oe (80 A/m), 25°C

Total flux

2Фm ( µWb)

Coercitive force

Hc (A/m)

Squareness ratio

Br/Bm (%)

Without container With container Nominal Nominal Nominal Nominal Nominal +-13% Max. Min.
MSSN-10В-L 10.0-6.8-4.5 11.9-5.8-6.3 26.39 0.0562 0.26 0.0146 1.09 13.5 35,0 97,0
MSSN-11S-L 11.0-8.0-4.5 14.0-6.6-6.3 29.85 0.0527 0.34 0.0179 1.15 12.6
MSSN-13В-L 12.8-9.5-3.2 14.7-7.8-5.1 35.03 0.0412 0.49 0.020 1.06 9.9
MSSN-15S-L 15.0-10.0-4.5 16.9-8.6-6.5 46.18 0.0948 0.59 0.052 2.53 21.1
MSSN-18S-L 17.4-12.0-4.5 19.8-10.4-6.4 46.18 0.0948 0.85 0.080 3.22 22.7

* - Squareness ratio Br/Bm @ 1 kHz, 80 A/m: 97%
Operating temperature range -60°C ... 120°C

ADDITIONAL PARAMETERS AND CHARACTERISTICS: