Nanocrystalline Cores for High Frequency Transformers, Inverter Welding Machine

Nanocrystalline Transformer Core has 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
KMN805025S	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
KMN1006020S	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
KMN1207020S	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
KMN1207030S	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
KMN1308040S	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
KMN1308050S	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;

Ω – Toroidal nanocrystalline core with two legs.