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Amorphous And Nanocrystalline Switching Power Supply High Power Inductor Common Mode Inductor Power Transformer

Amorphous And Nanocrystalline Switching Power Supply High Power Inductor Common Mode Inductor Power Transformer

Amorphous and nanocrystalline switching power supply high power inductor common mode inductor power transformer Product details It is applied to all kinds of power supply. Magnetic properties of Microcrystalline Alloy common mode inductors Saturation magnetic induction intensity Bs (T) 1.25...

Amorphous and nanocrystalline switching power supply high power inductor common mode inductor power transformer

Product details


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It is applied to all kinds of power supply.

Magnetic properties of Microcrystalline Alloy common mode inductors


Saturation magnetic induction intensity Bs (T) 1.25

Initial permeability I (Gs/Oe). 8 * 104

Maximum permeability m (Gs/Oe). 20 * 104

Coercivity Hc (A/m) <2

Curie temperature Tc (c) 560

Crystallization temperature Tx (c) 500

Saturation magnetostriction coefficient lambda s <2 * 10-6 "2

Continuous working temperature -50~130

Residual magnetic induction intensity Br (T) 0.5~0.8

Iron loss P (20kHz, 0.5T), (W/kg) "25

Iron loss P (100kHz, 0.2T), (W/kg) "70

The change rate of iron loss is P (-50~125 C) (15%).


Amorphous alloy is a new type of alloy material which was invented in the 1970s. It is a kind of amorphous alloy with the characteristics of short-range ordering and long-range disorder in atomic arrangement and combination. The liquid metal is cooled directly by the international advanced super-quenching technology at a cooling rate of 1 *106 c/s to form a solid thin strip with a thickness of 0.02 mm to 0.04 mm. Microstructure does not have the crystal structure of traditional metal materials, so it has different properties from traditional materials, such as excellent soft magnetic properties, corrosion resistance, wear resistance, high hardness, high strength, high resistivity and so on. Because of its excellent performance and simple production process, it has become the focus of research, development and application in the field of material science at home and abroad since the 1980s. It not only develops soft magnetic materials for the electronic industry, but also develops alloys for other uses, such as brazing materials, catalysts, structural materials and so on. In the late 1980s, materials scholars developed nanocrystalline soft magnetic alloys on the basis of amorphous materials, which have better soft magnetic properties.


Characteristics of amorphous common mode inductor:


EMC common-mode inductor filters are made of iron-based nanocrystals (ultrafine crystals) to form EMC common-mode inductor filter iron cores, which have the characteristics of high saturation magnetic induction, high permeability, high inductance, good frequency characteristics and good temperature stability (can be used for a long time in the temperature range of - 50 ~ 130 C). It is suitable for EMC common mode interference filtering and protection of precision electronic equipment in power grid and various power sources.


Scope of application:


The common mode inductor choke is an important part of switching power supply, frequency converter, UPS power supply and so on. Its working principle: when the working current flows through two winding opposite coils, two counteracting magnetic fields H1 and H2 are produced. At this time, the working current is mainly damped by the coil ohmic resistance and the small leakage inductance at negligible operating frequency. If there is interference signal flowing through the coil, the coil presents a high impedance, producing a strong damping effect to attenuate the interference signal.





Common-mode inductance and spike suppressor are both small-signal working conditions, requiring that the larger the inductance, the better, the inductance L is proportional to the effective permeability mu e, the same specifications of iron core, the higher the mu e, the greater the L. Therefore, the size of the common-mode inductor core can be greatly reduced by using ultrafine-grained alloy materials, especially for the common-mode inductor core under high current and high power conditions. It has a good performance-price ratio and can replace ferrite ring. In general, the effective permeability of these ferrites is about 10,000, while the effective permeability of ultrafine grained alloys is about 80-100,000. Under the same inductance, the size of the latter core is only 1/8-1/10 of the former, and the unit valence difference between the two is about 4-5 times. Obviously, the ultrafine grained alloys are more competitive. For example, a military three-phase switching power supply, working current 100A, a 130 90 30 mm ultra-fine crystal alloy core to replace four 130 70 50 high-performance ferrite core.


Spike Suppressor is a common anti-noise interference device in switching power supply. The inductor in this device is small in size and large in inductance. It requires high permeability of magnetic core material. In the past, Co-based amorphous alloy was used to fabricate this kind of small inductance device. Because of the high content of Co, the high price and the difficulty of application, it is now difficult to use ultrafine crystal ribbon. Instead of Co based amorphous alloy, making this kind of small inductance series iron core greatly reduces the cost.


Compared with ferrite inductors, the advantages of amorphous inductors are:


(1) due to the low power consumption of Fe based nanocrystalline alloys, the working magnetic density is allowed to be higher than 200mT. With the decrease of core section and volume, the number of coil turns, the amount of copper and iron used in medium and high frequency electronic transformers will be reduced, and the overall cost will be reduced.


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