Nanocrystalline Common Mode Choke Cores
Nanocrystalline cores have very high permeability over low frequency to high frequency. They are very suitable for common mode chokes used as EMC filters to compress conducted common mode noise. Compared to traditional ferrite cores, nanocrystalline cores have a lot of advantages as high inductance, good filter effective, small size and volume,lower turns of copper wire, lower power consumption and high efficiency.Nanocrystalline cores have very high curie temperature about 560℃, much higher than traditional ferrite core about200℃. High curie temperature make nanocrystalline core excellent thermal stability, and can continuous working at up to120℃ environment. Nanocrystalline cores is the best choice for application of common mode choke.
Characteristics
High initial permeability: Larger insert loss, better inhibiting effect on conducted interference than ferrite.
High saturation induction: about 2-3 times higher than ferrite, hardly magnetized to saturate in the cases of current strong interference.
Excellent temperature stability: higher Curie temperature, the changes in alloy performance obviously lower than ferrite under the circumstance of larger temperature fluctuations, showing excellent temperature stability
Flexible frequency characteristic: More flexible to obtain the required frequency characteristic through adjustment process.
Physical Properties
| Saturation Magnetization(Bs) | 1.25T | Saturation Magnetostrictive Coefficient(λs) | <2×10-6 |
|---|---|---|---|
| Curie Temperature(Tc) | 560℃ | Density(d) | 7.3g/cm3 |
| Crystallization Temperature(Tx) | 510℃ | Resistivity(ρ) | 130μΩ-cm |
| Hardness(Hv) | 800 | Continuous Operating Temperature Range | -55~130℃ |
Magnetic Properties
| Annealing Method | Non-magnetic Annealing |
|---|---|
| Initial Permeability | >150,000 |
| Maximum Permeability | >600,000 |
| Residual Magnetic Flux Density | 0.6T |
| Coercivity | <0.8A/m |
| Iron Loss P(20kHz,0.5T) | <25W/kg |
| Iron Loss P(100kHz,0.3T) | <150W/kg |
| Iron Loss Change Rate (-55℃~125℃) | <15% |
Applications
Frequency converter
Inverter (Inverter Welder, Photovoltaic Inverter)
Converter
Electric vehicle charging pile
Gas insulated switchgear
High energy particle accelerator
UPS
EMC filter
Wind power
Board card
Inverter air conditioner
Flat panel TV
Radiant-cooker
Performance Curves
Core Dimension
OD-Outside Diameter ; ID-Inside Diameter ; HT- Height
Specification
Note: AL is single-turn inductance, test level is 0.3V, and 10-100KHz output inductance in Table is ±25%. AL test instrument is HT2816B. We can make magnetic core coating, and customize products of other dimensions excluded in the Table according to customers’ requirements.
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