Split Nanocrsytalline Core
Gapped / Split Nanocrystalline Core
Precision-gapped and split Nanocrystalline Core for stable inductance, easy assembly, and high current handling. Ultra-high permeability with engineered air gaps delivers low loss, wide frequency performance and controlled saturation.
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DG Focus Technology Co., Ltd. · Custom gaps · Fast sampling · Reliable mass production
Key Highlights
Calibrated air gap
Precise effective permeability for accurate inductance and controlled saturation current.
Split construction
Open-core design simplifies winding and assembly; ideal for retrofits and thick wire.
Low core loss
Nanocrystalline ribbon delivers low loss from mid- to high-frequency for cooler operation.
Thermal stability
Reliable performance from −40–150 °C with low temperature drift.
EMI suppression
Excellent common-/differential-mode noise attenuation across wide bandwidth.
Flexible forms
Split toroid, C-core, coated or cased options; custom sizes and gap tolerance on request.
Typical Applications
PFC / Storage Chokes
Higher DC bias tolerance with calibrated gap
EMI Filters
Common-/differential-mode inductors with stable inductance
PV / ESS / UPS Inverters
LCL and DC-Link filtering
EV OBC & Fast Charging
High current, compact builds
Current Transformers / Sensors
Split toroids for easy installation
Welding / Induction Heating
High-frequency, high-current environments
Key Specifications
| Core Material | Fe-based Nanocrystalline alloy (rapidly quenched; similar to FINEMET) |
|---|---|
| Effective Permeability μe | Custom per gap: typical 500–20,000; tighter ranges available on request |
| Ungapped μr (reference) | 80,000–150,000 (material), tuned via heat treatment |
| Saturation Flux Density Bs (typ.) | ≈ 1.2 T |
| Gap Options | Machined fixed gap / shim-calibrated gap / epoxy filled; tolerance as tight as ±0.02–0.05 mm depending on size |
| Ribbon Thickness | 18–25 µm standard (14–35 µm optional) |
| Operating Temperature | −40–150 °C (consult for higher ranges) |
| Forms | Split toroid, C-core; coated or cased versions |
| Compliance | RoHS / REACH friendly; Hi-Pot insulation options available |
Values shown are typical engineering ranges; final datasheets and drawings prevail for ordering.
FAQ
Why add an air gap to nanocrystalline cores?
A calibrated gap lowers effective permeability, increases saturation current, and stabilizes inductance under DC bias—essential for chokes and power filters.
Split vs. solid toroid?
Split construction simplifies winding and field installation (e.g., CTs). Solid toroids offer maximum magnetic continuity for the same size. Choose based on assembly method and performance target.
How do you define the required gap?
Share inductance, current/ΔI, frequency, window limits, and allowable temperature rise. We will compute μe, gap length, turns and provide loss/thermal estimates.
Need a precise gap or special size?
Tell us your target inductance, DC bias, frequency, size limits, and thermal targets. We will propose core grade, geometry, gap and turns with a loss/temperature estimate.
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