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Ring-shaped nanocrystalline cores are mainly for processing transformers magnetic amplifiers, chokes, energy storage inductors, filter inductors, common mode chokes and peak suppressors operated at single-ended, push-pull, and full-bridge/high-frequency modes. These cores exhibit:
- High saturation induction (which can effectively reduce the size of transformers)
- High permeability and low coercivity (which can improve the efficiency, and reduce the exciting power and the coil distribution parameters of transformers)
- Low core loss and magnetostriction coefficient
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Cores (Ring-Shaped) Table
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Core Code
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Core dimension (mm)
ID/OD×H
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Case dimension (mm)
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S (cm2)
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L (cm)
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OD
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ID
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H
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CSPT-01
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Φ6.5/9.8×4.5
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11.5
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4.6
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6.5
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0.056
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2.56
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CSPT-02
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Φ 8.2/12×5
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12.6
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6.8
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7.1
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0.065
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3.22
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CSPT-03
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Φ 12/25×5
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21
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10
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9
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0.14
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5.03
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CSPT-04
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Φ 16/26×5
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30.6
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14.2
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9.9
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0.163
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6.6
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CSPT-05
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Φ 9/12×10
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17
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7
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13
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0.105
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3.3
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CSPT-06
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Φ 14/19×10
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23
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12
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13
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0.175
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5.18
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CSPT-07
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Φ 12/20×5
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24.8
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10.4
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8.6
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0.14
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5.03
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CSPT-08
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Φ 12/20×8
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24.8
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10.4
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11.6
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0.2
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5.03
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CSPT-09
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Φ 12/20×10
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24.8
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10.4
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13.5
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0.26
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5.03
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CSPT-10
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Φ 15/24×15
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28
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13
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18.5
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0.47
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6.12
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CSPT-11
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Φ 16/26×10
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30.6
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14
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13.6
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0.625
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6.6
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CSPT-12
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Φ 20/30×10
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36.7
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18
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13.6
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0.35
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7.85
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CSPT-13
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Φ 20/32×10
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38.7
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18
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13.6
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0.39
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8.17
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CSPT-14
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Φ 20/30×15
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36.7
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18
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18.6
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0.525
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7.85
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CSPT-15
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Φ 25/40×10
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45
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22.6
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13.6
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0.488
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10.2
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CSPT-16
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Φ 25/40×15
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45
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29.6
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16.8
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0.732
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10.2
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CSPT-17
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Φ 32/50×10
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55.3
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29.6
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11.8
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0.585
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12.9
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CSPT-18
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Φ 32/50×15
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55.3
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29.6
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16.8
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0.88
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12.9
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OD = Outside diameter, ID = Inside diameter, H = Height
S = Effective cross-sectional area
L = Average length of the magnetic circuit
Typical physical properties of iron-based nanocrystalline, iron-based amorphous,
and ferrite cores
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Physical parameter
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Core Material
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Fe-based nanocrystalline
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Co-based amorphous
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Ferrite
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Saturation induction Bs (Tesla)
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1.25
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0.6-0.8
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0.5
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Saturation magnetostriction lS (ppm)
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< 2
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0
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4
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Resistivity (μΩ·cm)
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130
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130
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106
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Curie temperature (¡æ)
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320
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570
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< 200
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Remanence Br (Tesla)
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0.20-1.0
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0.1-0.6
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0.20
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Initial permeability (Gauss/Oe) (103)
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> 80
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> 10
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£
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Maximum permeability (Gauss/Oe) (103)
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> 600
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> 200
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< 20
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Coercivity HC (A/m)
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< 2
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< 2
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6
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Core loss (20 kHz, 0.5 Tesla) (W/Kg)
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< 25
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< 25
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N/A
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Core loss (100 kHz, 0.2 Tesla) (W/Kg)
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< 60
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< 60
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N/A
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Power loss of switch power transformers made by amorphous and nanocrystalline
iron-based ribbons and operated at different remanence regimes
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Ribbon Type
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BS(T)
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Low Br/BS regime
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Medium Br/BS regime
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High Br/BS regime
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Br/BS
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P (W/Kg)
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Br/BS
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P (W/Kg)
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Br/BS
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P (W/Kg)
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Amorphous
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1.56
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≤ 0.2
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P0.35/10K ≤ 18
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0.6
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P0.35/10K ≤ 20
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≥ 0.9
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P0.35/10K ≤ 25
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Nanocrystalline
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1.25
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≤ 0.2
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P0.3/100K ≤ 120
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0.6
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P0.3/100K ≤ 150
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≥ 0.85
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P0.3/100K ≤ 200
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