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Nanocrystalline technology innovation is developing rapidly with wireless charging

Nanocrystalline technology innovation is developing rapidly with wireless charging

2021-08-26

Although wireless network wireless charging can improve the importance of customer experience, it also has the problem of slow battery charging, so it is urgent to improve the battery charging output power. However, the traditional ferrite core raw materials are very hot in wireless charging, and the charging requirements of power battery can not be considered for a long time.


In contrast, nanocrystalline raw materials contain a variety of probabilities, and have great potential for application and development in wireless charging in the future. Therefore, in the wireless charging application and Rx touch group design scheme, the advantages of nanocrystalline raw materials are presented vividly.


Nanocrystalline raw materials have a variety of excellent comprehensive magnetic energy, such as high saturation magnetic induction (), permeability > 800, and low high frequency loss under high magnetic induction. They are the best raw materials with comprehensive energy in the sales market at this stage. Nowadays, with its advantages, nanocrystals can stand out in the detection of a variety of important main parameters of magnetic materials, and slowly replace ferrite cores to become a new choice for many wireless charging manufacturers.


According to statistics, the saturated magnetic induction of amorphous nano-m-sheet is far higher than that of ferrite core, and its anti saturation working ability is far higher than that of ferrite core. The magnetic induction intensity of nano-m-sheet raw material does not change much with temperature, it is not easy to be in magnetic saturation state, and the temperature reliability is better than that of ferrite core.

Aluminum alloy amorphous strip

In addition, nano-m-sheet raw material has the characteristics of high saturation magnetic flux, low loss and high thermal conductivity. Under the same wireless charging standard, the temperature of nano-m-sheet raw material is 7 ~ 8 ℃ lower than that of ferrite core. In contrast, the raw materials of ferrite core are very easy to exceed the saturation state. In wireless charging applications, with the increase of temperature, the magnetic induction is reduced, the shielding characteristics are reduced, the vortex is improved, the scalding is more serious, and polarization is generated. The characteristics of nano-m-sheet raw materials are very stable below 80 ℃. With the increase of temperature, although the magnetic induction decreases, the transformation is not strong.


Transmart is a technology company integrating design scheme, product R & D, production, manufacturing and marketing of amorphous and nanocrystalline new soft magnetic materials and electronic devices. Its main business is nanocrystalline strip, ultramicrocrystalline magnetic core, permalloy magnetic core, high-power transformer core, nanocrystalline magnetic ring inductance, electromagnetic ring coil, open and close transformer, common mode inductance coil Precision current transformers and other products have the advantages of good stability and high electrical parameters.


At this stage, the industrial production and processing process of amorphous nano crystalline amorphous strip of the enterprise includes layer by layer process processes such as smelting, belt spraying, belt feeding + Inspection and winding. At this stage, the quenching angular velocity exceeds ~ 30m / s, the thickness of amorphous strip is 18 ~ 37um, and the total width of amorphous strip is.


In order to meet the new sales market challenges and meet the fashion trend of the sales market with high efficiency, low loss and thin specifications, the next product R & D scheme will be carried out in three aspects: the promotion of nanocrystalline commodities, technical improvement and the development and design of new products.

At the level of research and development of nanocrystalline raw materials and products, reduce the soft magnetic material HC and improve BS to improve the alloy composition. Yes, at this stage 18 μ M thin nanocrystalline amorphous strip to reduce eddy current loss, improve frequency network bandwidth and reduce commodity thickness to 12 ~ 15 μ m。 According to the improvement of permeability and commodity consistency, the overall goal of constant support force quenching of nanocrystalline amorphous strip is more than 12000 ~ 15000.


According to statistics, when the nanocrystalline amorphous strip is subjected to crystallization and constant support force quenching and tempering, it will cause magnetic anisotropy, make the long and short directions of the thin strip become difficult to be magnetized axis, and then manipulate the permeability in a large range to produce nanocrystalline soft magnetic materials with different permeability. This low permeability nanocrystalline soft magnetic material has the characteristics of low eddy current loss and can inhibit the reduction of permeability when higher frequency and electromagnetic field coincide. Therefore, it can be applied to DC accumulation in high frequency region.


At the technical level of free on-line insulation coating of nanocrystalline amorphous strip, amorphous will be technically improved by reducing loss, improving frequency network bandwidth and reducing commodity thickness. In the future, the amorphous film will also be developed and designed technically according to the tape casting sheet, which can reduce eddy current loss, improve frequency network bandwidth and reduce commodity thickness μ Grade m soft magnetic powder powder.


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