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TOROIDAL CORES

Toroidal Cores are made from Iron based Soft magnetic material. These are derived from Crystalline Amorphous ribbon and subsequent heat treatment around 500-600° C .The typical grain size is only 10 nanometers hence the name Nano Crystalline.

There appears to be no limitation to the type of cores that can be manufactured from Nano Crystalline material: C-cores, E-cores , Uncased Toroids, Cased Toroids, Multiple cuts Gapped Toroids, etc.

Applications

  • Common mode chokes used in EMC/EMI filters for SMPS and inverter drives
  • Transformer Cores for high frequency Switched mode power supplies
  • Electrical welding power sources
  • X-ray generators
  • Battery chargers
  • Solar generators
  • Sensor Cores
  • AC to DC or DC to DC converters
  • Cores used in Power supplies in the automotive industry
  • Cores for saturable reactors, magnetic amplifiers, beads and pulse compressors
  • Railway Transportation Systems
  • Electronic Watt-Hour Meters
  • Transformer cores for Earth leakage circuit breakers (ground fault interrupters)

Benefits

  • Significantly smaller build volume (up to more than a factor of 3)
  • Satisfy both high saturation magnetic flux density and high permeability long with low coercivity
  • Makes the single stage filter designs possible
  • Low core loss (approximately 1/5th of the Fe based amorphous metal)
  • Low magnetostriction, thus less affected by mechanical stress
  • Low number of turns required for high L, thus reducing number of filter stages
  • High efficiency, hence low power loss and hence less use of material makes it eco friendly
  • Very low audible noise emission
  • Less copper loss due to reduced number of turns
  • Aging effects are very small unlike Cobalt amorphous metals
  • Epoxy coated fiber glass tape/casing is resistant against mechanical stress
  • Excellent high frequency characteristics as the values of permeability and core losses remain high and low respectively at very wide range of frequencies.
  • Extended temperature range from -25… + 120ᵒC (standard) /180ᵒC (special) due to high curie temperature, thus making material properties nearly independent of temperature

MAGNETIC PROPERTIES

Material Grade UMNT-V UMNT-A
Initial Permeability >3x104 >1x104
Maximum Permeability >8x104 >6x104
Coercitivity <3Ax m >1.6A/ m
Core Loss (100Khz, 0.3T) <80W/kg >150W/kg

PHYSICAL PROPERTIES

Material Grade UMNT-V UMNT-A
Saturation Flux Density 1.20T 1.25T
Curie Temperature 570ᵒC 570ᵒC
Crystallization Temperature 500ᵒC 510ᵒC
Hardness Hv 800kg/mm2 880kg/mm2
Saturation Magnetostriction <3x10-6 <2.7x10-6
Density 7.35g/cm3 7.25g/cm3
Resistivity 115ᵒµ-ohm-cm 130ᵒµ-ohm-cm
Continuous Upper Operation Temperature 130ᵒC 130ᵒC
PRODUCT MADE BY NANO CRYSTALLINE MATERIAL
Part No. Bare Dimension (mm) With Reinforcement dimensions (mm) Im* (cm) Ac* (cm) Wa*
(cm)
Mfe*
(g)
AL**
(µH)±30%
OD ID Height OD ID Height
UMNT-A0131005 12.50 9.50 5.00 14.50 7.50 6.80 3.46 .06 .71 1.4 5.45
UMNT-A0201308 20.10 12.70 8.00 22.00 10.70 9.80 5.15 .22 1.27 8.3 14.44
UMNT-A0201310 20.10 12.70 10.00 22.50 10.20 12.30 5.14 .28 1.27 10.3 18.05
UMNT-A0261910 25.60 19.10 10.00 28.10 16.60 12.30 7.02 .25 2.87 12.6 11.63
UMNT-A0252015 25.00 20.00 15.00 27.60 17.40 17.40 7.07 .29 3.14 14.6 16.00
UMNT-A0302010 30.00 20.00 10.00 33.00 17.20 12.40 7.85 .38 3.14 21.6 19.20
UMNT-A0402520 40.00 25.00 20.00 43.40 21.60 23.20 10.21 1.14 4.91 84.4 44.31
UMNT-A0504020 50.00 40.00 20.00 53.40 36.60 23.70 14.14 .76 12.57 77.9 21.33
UMNT-A0645025 64.00 50.00 25.00 67.40 46.60 28.20 17.91 1.33 19.63 172.7 29.47
UMNT-A0645030 64.00 50.00 30.00 67.40 46.60 33.20 17.91 1.60 19.63 207.2 35.37
UMNT-A0755030 75.00 50.00 30.00 78.40 46.60 33.20 19.63 2.85 19.63 405.7 57.60
UMNT-A0805030 80.00 50.00 30.00 83.40 46.60 33.20 20.42 3.42 19.63 506.3 66.46
UMNT-A0906030 90.00 60.00 30.00 93.40 56.60 33.20 23.56 3.42 28.27 584.2 57.6
UMNT-A1008030 100.00 80.00 30.00 103.40 76.60 33.20 28.27 2.82 50.27 467.4 32.00
PRODUCT MADE BY VAC MATERIAL
Part No. Bare Dimension (mm) With Reinforcement dimensions (mm) Im* (cm) Ac* (cm) Wa*
(cm)
Mfe*
(g)
AL**
(µH)±30%
OD ID Height OD ID Height
UMNT-V0131005 12.50 9.50 5.00 14.50 7.50 6.80 3.46 .06 .71 1.5 12.00
UMNT-V0201308 20.00 12.70 8.00 22.00 10.70 9.80 5.14 .22 1.27 8.4 31.43
UMNT-V0201310 20.00 12.70 10.00 22.50 10.20 12.30 5.14 .28 1.27 10.5 39.19
UMNT-V0261910 25.60 19.10 10.00 28.10 16.60 12.30 7.02 .25 2.87 12.8 27.92
UMNT-V0252015 25.00 20.00 15.00 27.60 17.40 17.40 7.07 .29 3.14 14.9 32.0
UMNT-V0251620 25.00 16.00 20.00 28.00 13.20 22.80 6.44 .68 2.01 32.6 84.29
UMNT-V0252020 25.00 20.00 20.00 28.00 17.20 22.80 7.07 .38 3.14 19.9 92.67
UMNT-V0302010 30.00 20.00 10.00 33.00 17.20 12.80 7.85 .38 3.14 22.1 38.40
UMNT-V0402520 40.00 25.00 20.00 43.40 21.60 23.20 10.21 1.14 4.91 86.1 88.62
UMNT-V0504020 50.00 40.00 20.00 53.40 36.60 23.20 14.14 .76 12.57 79.5 42.67
UMNT-V0504025 50.00 40.00 25.00 53.40 36.60 28.20 14.14 .95 12.57 99.4 53.33
UMNT-V0645025 64.00 50.00 25.00 67.40 46.60 28.20 17.91 1.33 19.63 176.2 58.95
UMNT-V0645030 64.00 50.00 30.00 67.40 46.60 33.20 17.91 1.60 19.63 211.5 70.74
UMNT-V0755030 75.00 50.00 30.00 78.40 46.60 33.20 19.63 2.85 19.63 414.4 115.2
UMNT-V0805030 80.00 50.00 30.00 83.40 46.60 33.20 20.42 3.42 19.63 516.8 132.92
UMNT-V0906030 90.00 60.00 30.00 93.40 56.60 33.20 23.56 3.42 28.27 596.3 115.2
UMNT-V1008020 100.00 80.00 20.00 103.40 76.60 23.20 28.27 1.52 50.27 318.0 42.67

USHA AMORPHOUS METALS LTD.

486-487 Udyog Vihar; Phase – III
Sector – 20; Gurgaon – 122016, (Haryana) INDIA

  • GST NO: 06AAACU1272B1ZW
  • CIN NO: U27310HR1988PLC044023