MAGNETIC ALLOY POWDER CORES
IRON BASED AMORPHOUS ALLOY POWDER CORES
Summary
Micrometal Alloy Powder Magnetics has developed and is proud to release a new soft magnetic powder. Core product composed of an Iron based amorphous alloy powder. The low core loss and excellent DC bias characteristic of this amorphous powder contributes to highly efficient switching. This new material also offers significant size & weight reduction compared with existing powder core materials such as MPP, High Flux™, Super-MSS™ and Iron-Silicon (Fe-Si)™. This Size reduction is a direct result of higher saturationflux density and lower volumetric losses.
Described as s “Holy Grail Material”, the new Amorphous powder cores provides a never seen before combination of the low core loss characteristic of MPP and the excellent flux saturation capability of High-Flux™ or Iron-Silicon (Fe-Si)™.
Material Property Comparison
Benefits:
- Smaller Size.
- Lighter Weight.
- High Saturation FLux Density 15,000 Gauss (1.5 Tesla).
- Excellent DC Bias.
- Lower core Loss (60μ – 300~400 mw/cc @ 0.1 tesla, 50KHZ).
Applications:
- Switched Mode Powder supply.
- Common Mode Chokes.
- Telecom Interface Transformers and Signal Filters.
- High Accuracy current transformers.
- PFC chokes for Telecom, Networking and General Industrial applications.
- O/P chokes Telecom and General industrial applications.
- DC/DC Converter chokes.
Core Geometries
Micrometal Alloy Powder Cores Magentics can supply a wide range of standard toroid O.D sizes from 0.14 inch (3.6 mm) to 5.218 inch (133 mm), identical to the existing Micrometals Alloy Powder Cores MPP, High-FLux™ and Super-MSS™ and Fe-Si™ powder core series. Micrometals Alloy Powder Cores is also capable of providing non-standard, customer-specified physical dimensions.
Typical Incremental Premability vs D.C. Bias
The DC bias curves (below) demonstrate that the Iron base amorphous alloy powder core is excellent when compared with SMSS (Sendust) and MPP cores around 120 Oe and even can bear comparison with High flux and Iron Silicon powder cores at 200 Oe and above on similar permeabilities and size. The curves presented here are measured based on standard 1.06 inch OD toroid core samples using a signal of 10 KHZ and 100 mA AC.
Permeability versus Temperature
Micrometals Alloy Powder Cores Iron base amorphous alloy powder cores are stable with temperature compared to common ferrite cores and tape wound cores.
Typical Core Loss Curves
The Core loss curves (below) demonstrate that Iron base amorphous alloy powder cores are excellent when compared with SMSS (Sendust), High flux and Iron silicon cores and close to MPP core loss performance on similar permeabilities and size. The curves presented here are measured based on standard 1.06 inch OD toroid cores.
Typical Permeability vs. Frequency
The inductance versus frequency graph (below) demonstrates the near linear performance of Iron-Silicon powder cores to 1 MHz. Roll-off in permeability from low frequencies to 1 MHz is less than 2.0 percent!
