Iron-based Nanocrystalline Magnetic Cores For Pulse Transformer

Iron-based Nanocrystalline Pulse Transformer cores:

Toroidal nanocrysalline magnetic cores as pulse transformer for the strictest thyristors, IGBTs, MOSFETs and GTOs control applications. Comparing to the ferrite cores, Iron-based nanocrystalline cores have the features with high saturation, high permeability, low core loss and excellent stability. Pulse transformer cores are mainly used in railway, electrical distribution, navy and renewable energies.

Comparison of typical specification between nanocrystalline cores and ferrite cores:

Basic Parameter	Nanocrystalline Core	Ferrite Core
Saturation Magnetostriction Induction Bs(T)	1.25	0.5
Residual Magnetic Field Density Br (T) (20KHz)	<0.20	0.2
Core Loss (20KHz, 0.2T) (W/kg)	<3.4	7.5
Core Loss (20KHz, 0.5T) (W/kg)	<35	Can not be used
Core Loss (20KHz, 0.3T) (W/kg)	<40	Can not be used
Permeability (20KHz) (Ge//Oe)	>2×104	2×103
Coercive Force (A/m)	<1.60	6
Saturated Magnetostrictive Coefficient λs	<2×10-6	4×10-6
Resistivity (µΩcm)	80	1X106
Curie Temperature (°C)	570	<200
Occupation efficiency	>0.70	—

Features:

1. High saturate induction—reduce volume of transformers.
2. High permeability and low coercivity—improve efficiency, lower exciting power and reduce copper loss.
3. Low core loss—reduce temperature rise of transformers.
4. Excellent temperature stability—with the serving temperature of -55℃~130℃ for long time.

Applications:

• Railway system
• Electrical distribution
• Renewable energy.

Specifications:

Part No.	Core size(mm)			Finished size(mm)			Ac(cm2)	Le(cm)	Weight(g)	Power(KW) 20KHz
	ID	OD	H	ID	OD	H
SC-HFT-002	40	64	20	37	66	23	1.77	16.3	215	0.8—1.4
SC-HFT-004	40	70	25	37	73	28	2.42	17.3	310	1.2—2.0
SC-HFT-008	50	75	25	47	78	28	2.13	19.6	310	1.2—2.1
SC-HFT-009	50	80	20	47	83	23	2.18	20.4	330	1.3—2.2
SC-HFT-010	50	80	25	47	83	28	2.65	20.4	400	1.6—2.7
SC-HFT-006	40	80	30	37	83	33	4.5	18.8	625	2.5—4.2
SC-HFT-007	40	90	20	37	93	23	3.64	20.4	550	2.2—3.8
SC-HFT-011	50	90	30	46	94	34	4.42	21.98	720	3.0—4.8
SC-HFT-013	50	100	25	46	104	29	4.63	23.55	810	3.5—5.2
SC-HFT-019	70	120	30	65	125	35	5.55	29.83	1225	5.8—8.0
SC-HFT-022	80	120	20	75	125	25	2.96	31.4	688	2.8—4.6
SC-HFT-023	80	120	25	75	125	30	3.7	31.4	860	3.5—5.2
SC-HFT-024	80	120	30	75	125	35	4.44	31.4	1032	4.2—7.0
SC-HFT-030	90	130	30	85	136	35	4.44	34.54	1135	5.0—8.0
SC-HFT-031	90	130	50	85	136	55	7.2	34.54	1850	8—13
SC-HFT-041	100	140	40	94	146	30	5.76	37.68	1610	7.0—12