Noise Suppression Spike Killer Cores

MSK series

Cores of the MSK series are made of a thin amorphous tape (18 ± 2 μm) based on cobalt AMAG 172, have a rectangular hysteresis loop and significantly higher magnetic permeability compared to cores made of permalloy alloys based on Fe-Ni and ferrite analogs.

Having a very high inductance at the moment of current zero crossing, these products effectively block rapid changes in electrical current that could lead to electrical noise and interference, as well as damage to semiconductor devices by short high-potential surges.

This class of products provides a higher effective suppression of interference, essentially eliminating the cause of their occurrence, significantly reduces losses compared to classic RC dampers and ferrite cores of similar purpose.

 

 

 

 

You can find more details about the benefits in the article:

"Application of small-sized noise suppressing cores made of amorphous metal alloys"

 

DESIGN:

The twisted tape magnetic core is placed in a rigid protective container made of glass-filled polyamide and mechanically fixed with silicone sealant. The container provides reliable mechanical protection of the amorphous material and the preservation of its properties.

 

BASIC PROPERTIES OF THE USED AMORPHOUS MATERIAL AMAG 172:

  • Amplitude of induction, Bm (25°C) 0,60 T
  • Amplitude of induction, Вm (90°C) 0,54 Tл
  • Squareness coefficient Br/Bm (at 100 kHz, 80 A / m), not less than 0.94
  • Curie temperature, Tс 235°C
  • Operating temperature range from –60 °C to +100 °C
  • Magnetostriction less 0,1x10-6

APPLICATION:

  • Switching power supplies
  • Voltage converters
  • Electric motor control circuits
  • Switching semiconductor devices
  • Miniature Common Mode Filters
  • Semiconductor protection

ADVANTAGES:

  • Higher efficiency of blocking changes in electric current
    Low losses
    Low ripple output voltage from switching power supplies
    Simplicity of design

EXAMPLE RECORD:

MSK-10S-N, where:

  • MS - MSTATOR;
  • K - application (Spike Killer);
  • 10 - outer diameter, mm;
  • S - sectional designation;
  • N - heat treatment without magnetic field.

 

Overall dimensions and basic parameters

Core name   Dimensions
in container 1)
(without container)
(mm)		 Middle line length
Lm
(mm)

Effective section

Ас
(mm2)

Coeff. inductance

AL 2)
(μH / turn2)

 2Fm×Aw 3)
(μWb × mm2)		 Dynamic parameters
@ F = 100 kHz, Nm = 1 Oe (80 A/m), 25 °C
Full flow
2Fm
(μBb)		 Coercive force
Hc
(A/m)		 Coeff.
rectangular
Br/Bm
(%)
Nominal Nominal Nominal Min Nominal ±15% Max Min
MSK-09S-N ​​ 10,7 - 5,5 - 6,3
(9,0 - 7,0 - 4,5)		 25,0 3,5 1,8 93,6 3,9 25 94
MSK-10S-N ​​ 11,9 - 5,8 - 6,3
(10,0 - 7,3 - 4,5)		 27,0 4,7 2,2 137,8 5,3
MSK-12A-N ​​ 14,0 - 6,6 - 4,8
(12,0 - 8,0 - 3,0)		 31,0 4,7 1,9 176,8 5,2
MSK-12S-N ​​ 14,0 - 6,6 - 6,3
(12,0 - 8,0 - 4,5)		 31,0 7,0 2,8 268,6 7,9
MSK-15A-N ​​ 16,7 - 10,5 - 6,3
(15,0 - 12,0 - 4,5)		 42,2 5,3 1,6 513,3 5,9
MSK-15S-N ​​ 16,9 - 8,6 - 6,5
(15,0 - 10,0 - 4,5)		 38,7 8,8 2,8 578,2 9,8
MSK-18S-N ​​ 19,8 - 10,4 - 6,4
(18,0 - 12,0 - 4,5)		 46,5 10,5 2,8 1003,0 11,8
MSK-21S-N ​​ 22,8 - 12,4 - 6,3
(21,0 - 14,0 - 4,5)		 54,2 12,3 2,8 1669,8 13,8

Note:

  • 1) Outside diameter - inside diameter - height.
  • 2) At F = 50 kHz, Urms = 1 V, T = 25 °C.
  • 3) 2Fm - Maximum magnetic flux in the magnetic circuit [µVb]; Aw - Window for winding [mm2].
  • 4) Operating temperature range from -60 °C to +100 °C.

 

​ Application Information (MSK series)

​ Program for calculating interference suppression chokes