Amorphous Block Cores
The amorphous block cores made of iron-based amorphous ribbons which are superimposed and immersed in epoxy resin in vacuum. The core of the laminated sheet can work for a long time below 155 degrees. The amorphous block has high Curie temperature, magnetic permeability, magnetic saturation induction strength and low eddy current loss.
Characteristics
High saturation induction of 1.56 Tesla—Reducing component volume.
Low coercivity—Increasing component efficiency.
Low core loss—Reducing temperature rise in devices.
Variable permeability by different heat treatments—Satisfying various application requirements.
Excellent thermal stability—Having a highest service temperature of 130oC.
Physical Properties
| Saturation Magnetization(Bs) | 1.56T | Saturation Magnetostrictive Coefficient(λs) | <27×10-6 |
|---|---|---|---|
| Curie Temperature(Tc) | 410℃ | Density(d) | 7.18g/cm3 |
| Crystallization Temperature(Tx) | 535℃ | Resistivity(ρ) | 130μΩ-cm |
| Hardness(Hv) | 960 | Continuous Operating Temperature Range | -55~130℃ |
Magnetic Properties
| Transverse Field Annealed | No Field Annealed | Longitudinal Field Annealed | |
|---|---|---|---|
| Maximum Permeability μm | >2×104 | >20×104 | 25×104 |
| Saturation Induction BS | 1.5 T | 1.5 T | 1.5 T |
| Remanence Br | <0.5 T | 1.0 T | 1.2 T |
| Coercivity HC | <4A/m | <2.4 A/m | <4A/m |
| Core loss (50 Hz, 1.4 T) | <0.2 W/kg | <0.13 W/kg | <0.3 W/kg |
| Core loss (400 Hz, 1.2 T) | <1.8 W/kg | <1.25 W/kg | <2 W/kg |
| Core loss (8 kHz, 1.0 T) | <80 W/kg | <60 W/kg | <100 W/kg |
| Variation In Loss Between -55oC and 125 oC | <15% | <15% | <15% |
| Variation In Loss At 120 oC for 200 Hours | <15% | <15% | <15% |
Applications
High-power inductors
Medium-low frequency (400Hz-10KHz) transformer
Homogeneous magnetic resonance imaging stack
High-power photovoltaic inverters
Performance Curves
Specification
Core Dimension
L- Core length, T- Core thickness, W- Core width
Lamination factor= 90 ± 3%
Ac= W x Tx 0.90/100 cm2
Weight= L x W x Tx 0.90 x 7.18 / (1000 x 1000) kg
Cores with other specifications can be provided concerning to customer’s demand.
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