Nanocrsytalline Core
Nanocrystalline Core
Nanocrystalline Core solutions engineered by DG Focus deliver ultra-high permeability and exceptionally low core loss across a wide frequency range. They enable higher efficiency and smaller footprints in modern power electronics.
DG Focus Technology Co., Ltd. · Custom designs · Fast sampling · Reliable mass production
About DG Focus Technology Co., Ltd.
DG Focus specializes in the research, development, and manufacturing of high-performance magnetic cores for power electronics, energy management, and precision measurement.
Our product families use advanced magnetic materials: Nanocrystalline, Amorphous, and Permalloy (80% Nickel-Iron alloy). These materials are engineered for strong magnetic properties, high efficiency, and reliability.
Why Nanocrystalline from DG Focus
Ultra-high permeability
Typical μr 80k–150k for higher inductance and smaller size.
Very low core loss
Low loss in the mid- to high-frequency range reduces temperature rise and boosts efficiency.
High saturation flux
Typical Bs ≈ 1.2 T to handle higher current without early saturation.
Wide bandwidth
Stable performance from line frequency to hundreds of kHz for diverse topologies.
Thermal stability
Operating range −40–150 °C with low temperature drift.
EMI suppression
Excellent for common- and differential-mode noise attenuation.
Flexible form factors
Toroid, C/E shapes, and non-standard custom geometries.
Turnkey service
Design optimization, gapping, winding, varnish/potting, and quick sampling.
Typical Applications
PFC / Energy Storage Chokes
Server PSUs, chargers, industrial drives
EMI Filters
Common-mode & differential-mode inductors
Welding / Induction Heating
High-frequency, high-current environments
PV / ESS / UPS Inverters
DC-Link and LCL filtering
On-board Chargers & DC Fast Charging
High power density with low loss
Current Sensing
CTs and precision measurement
Key Specifications
| Material | Fe-based nanocrystalline alloy (rapidly quenched; similar to FINEMET) |
|---|---|
| Relative Permeability μr (typ.) | 80,000–150,000 (tuned per application & heat treatment) |
| Saturation Flux Density Bs (typ.) | ≈ 1.2 T |
| Core Loss | Low loss in mid-/high-frequency range; ideal for high-switching topologies |
| Curie Temperature | High, with good thermal stability |
| Operating Temperature | −40–150 °C (consult for higher ranges) |
| Form Factors | Toroid, C/E cores, custom non-standard sizes |
| Ribbon Thickness | Commonly 14–35 µm |
| Insulation / Varnish | Multiple classes available to meet safety and Hi-Pot requirements |
We provide typical engineering ranges. Please refer to final datasheets and drawings for ordering.
FAQ
How do nanocrystalline cores compare with amorphous and permalloy?
Nanocrystalline combines higher permeability with lower loss at mid-/high-frequencies. Amorphous is cost-effective for larger sizes and low frequency. Permalloy offers ultra-low loss and excellent stability for precision sensing.
What size range can you support?
From compact toroids to large C/E assemblies. Outer diameters from a few centimeters to >150 mm are common. Non-standard sizes are welcome.
How do you estimate loss and temperature rise?
Share the frequency, flux density, waveform, ambient, and mechanical limits. We will provide loss curves, thermal estimates, and winding/cooling optimization.
Need a quick recommendation or sample?
Tell us your target inductance, frequency, current, size limits, and thermal targets. We will propose material grade, core geometry, gap, and turns with a loss/temperature estimate.