Nanocrystalline Cores for High Frequency Transformers, Inverter Welding Machine

FT3-L finemet Nanocrystalline Cores for High Frequency Transformer

Nanocrystalline Transformer Core has very high permeability, high saturation induction, low coercivity, low core loss. Suitable for high frequency transformer of inverter welding equipment, solar inverter, and high power transformer in Kw range.

 

Features

 

Material: Fe-based Nanocrystalline core
Saturation flux density induction: 1.25T
Permeability @ 10KHz: > 20000
Curie temperature(℃): 560
Stacking factor: 0.78
Saturation magnetostriction(*10^-6): <2
Resistivity (μΩ.cm): 90
Ribbon thickness: 25μm
Core shapes: Toroidal core

High saturation flux density – you can reduce volume of transformers vs tranditional Ferrite
High permeability – improve efficiency,lower exciting power and reduce copper loss
Low coercivity and Low core loss – low temperature rise
Excellent thermal stability – working temperature of -40 – 130℃

 

Applications

 

>> Inverter welding machines
>> Electrolytic plating power supplies
>> High Power Laser power supplies
>> Communication, high-speed railway power supplies
>> High frequency heating systems
>> High frequency and high power switched mode power supply

 

Characteristics comparision

 

Properties Nanophous cores Ferrite cores
Saturation Flux density(T) 1.25 0.5
Remanence (T) (20KHz) <0.3 0.2
Core loss (20KHz/0.2T) (W/Kg) <3.4 7.5
Core loss (20KHz/0.5T) (W/Kg) <30 can not use
Core loss (50KHz/0.3T) (W/Kg) <40 can not use
Permeability (20KHz) >20,000 2000
Coercivity (A/m) <2.0 6
Saturation magnetostriction(*10^-6) <2 4
Resistivity (μΩ.cm) 90 10^6
Curie temperature(℃) 560 <200
Stacking factor >0.75 n/a

Core dimensions and Power capacity

 

Part No. Core dimensions Case dimensions Effictive
cross
section
Mean
path
length
Weight Power
@
20KHz
Case type*
od id h OD ID H AFe lFe mFe P
mm mm mm mm mm mm cm2 cm g KW
KMN503220T 50 32 20 53.8 28.5 24 1.40 12.9 131 0.5-1 O
KMN644020T 64 40 20 68.2 37 23.5 1.87 16.3 222 1-3 O
KMN805025T 80 50 25 83.5 47.2 28.8 2.93 20.4 433 3-5 O
KMN805025T-2 80 50 25 83.5 47.2 28.8 2.93 20.4 433 3-5 Ω
KMN1006020T 100 60 20 106 55 25 3.12 25.1 568 5-7 O
KMN1006020T-2 100 60 20 106 55 25 3.12 25.1 568 5-7 Ω
KMN1207020T 120 70 20 125 65 25 3.90 29.8 843 7-10 O
KMN1207020T-2 120 70 20 125 65 25 3.90 29.8 843 7-10 Π
KMN1207030T 120 70 30 125 65 36 5.85 2.98 1265 10-15 O
KMN1207030T-2 120 70 30 125 65 36 5.85 2.98 1265 10-15 Π
KMN1308040T 130 80 40 136 75 46 7.80 33.0 1864 15-20 O
KMN1308040T-4 130 80 40 136 75 46 7.80 33.0 1864 15-20 H
KMN1308050T 130 80 50 136 75 56 9.75 33.0 2331 20-25 O
KMN1308050T-4 130 80 50 136 75 56 9.75 33.0 2331 20-25 H

Power @ 20KHz only for reference, actual output power will depend on your design.
Other specifications are available according to customer’s requirements.

*  Case Type Notes:

O – Toroidal type nanocrystalline core;

Toroidal nanocrystalline transformer core KMN644020T
Ω – Toroidal nanocrystalline core with two legs.

Toroidal nanocrystalline cores with two legs

 

Π – Toroidal nanocrystalline core with two legs.

High frequency nanocrystalline transformer core KMN1207020T-2

H – Toroidal nanocrystalline core with four legs.

Transformer nano core with four legs KMN1308050T-4

 

Nanocrystalline cores for EMC common mode chokes: http://www.kingmagnetics.com/nanocrystalline-core.html

Nanocrystalline Cores for High Frequency Transformers, Inverter Welding Machine