Common mode choke made of Nanocrystalline Cores

Nanocrystalline cores feature very high permeability over low frequency to high frequency up to 30Mhz. They are very suitable for common mode choke to be used as EMC filter to compress conducted common mode noise. Compared to traditional ferrite core, nanocrystalline core has a lot of advantages as high inductance, good filter effective, small size and volume, less turns of copper wire, lower power consumption and high efficiency.

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Nanocrystalline cores feature very high permeability over wide frequency. They are very suitable for common mode choke to be used as EMC filter to compress conducted common mode noise. Compared to traditional ferrite core, nanocrystalline core has a lot of advantages as high inductance, good filter effective, small size and volume, less turns of copper wire, lower power consumption and high efficiency. Curie temperature of nanocrystalline core is about 560℃, much higher than traditional ferrite core about 200℃. High curie temperature make nanocrystalline core excellent thermal stability, and can continuous working at up to 120℃ environment.Nanocrystalline cores is the best choice soft magnetic material for common mode choke. Features: Material: Fe-based Nanocrystalline core Saturation flux density induction: 1.25T Permeability @ 10KHz: 80000 (Typical value) Permeability @ 100KHz: 20000 (Typical value) Curie temperature(℃): 560 Stacking factor: 0.78 Saturation magnetostriction(*10^-6): <2 Resistivity (μΩ.cm): 115 Ribbon thickness: 18~25μm Core shapes: Toroidal core Applications EMC Filter Switched mode power supply Computer power supply Communication and network power supply Laser and X-ray power supply Welding equipment and Electrical plating power supply Solar energy equipment and Wind power generator Household electrical appliance Uninterruptable power supply (UPS) Frequency converter Inducted heating equipment high-speed railway power supplies Craftsmanship Nanocrystalline alloys are formed by adding a certain amount of glass forming agent to the molten metal, and rapidly quenching and casting using a narrow ceramic nozzle under high temperature melting conditions. Amorphous alloys have the similar characteristics of glass structure, which not only make them have excellent mechanical properties, physical properties and chemical properties, but more importantly, the new technology of producing amorphous alloys using this rapid quenching method is less than the cold-rolled silicon steel sheet process. 6 to 8 processes can save energy consumption by 60% to 80%, which is an energy-saving, time-saving and efficient metallurgical method. Moreover, the amorphous alloy has low coercivity and high magnetic permeability, and its core loss is significantly lower than that of oriented cold-rolled silicon steel sheet, and its no-load loss can be reduced by about 75%. Therefore, the use of amorphous alloys instead of silicon steel sheets to manufacture transformer cores is one of the main means to save energy and reduce consumption in today’s powergrid equipment.

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