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Nanocrystalline technology innovation with the rapid development of wireless charging

by:Transmart     2022-05-04

With the rapid development of wireless charging, many industries such as smart phones, smart wearable devices, smart home systems, new energy vehicles and many other industries are now blooming. However, there are many difficulties in wireless charging, which also causes headaches for the manufacturing industry personnel. The entire industry chain has developed towards the five levels of simplicity, fast charging, temperature control, intelligence, and playability.u200bu200b

Recently, mobile phone manufacturers such as Huawei mobile phones have increased the output power of wireless network wireless charging to 15W, which has greatly encouraged the entire manufacturing industry. To maintain power wireless charging, wireless charging practitioners are facing many challenges at this stage, including: high conversion efficiency in the middle of electromagnetic induction, tighter and tighter magnetic coupling, magnetic interference, thermoelectric effect, part correction, and load adjustment. This will cause several problems such as the inability to point the charging part of the battery for wireless charging, the high efficiency of battery charging conversion, and the long charging time of the battery.u200b

As one of the important components of wireless charging technology, wireless charging equipment plays the role of improving the magnetic induction electromagnetic field and shielding electromagnetic coil interference. Therefore, wireless charging equipment has the function of permanent magnet material, product specifications, and availability. Reliability and other requirements are high.u200b

Although cross-generational products attract attention, their uniqueness and fun are not the key to gaining the sales market. In the end, customers still care about their feelings. Although wireless network wireless charging can improve the importance of customer experience, it also has the problem of slow battery charging, so there is an urgent need to improve battery charging output power. However, the traditional ferrite core material has a serious problem of overheating in wireless charging, and the charging requirements of power batteries cannot be considered for a long time.u200bu200b

In comparison, nanocrystalline raw materials contain a variety of possibilities and have great potential for application and development in wireless charging in the future. Therefore, in the wireless charging application and RX module design scheme, the advantages of nanocrystalline raw materials are fully presented. Nanocrystalline raw materials have high saturation state magnetic induction (), magnetic permeability> 800, high frequency loss under high magnetic induction and other excellent comprehensive magnetic energy. Nowadays, nanocrystalline can excel in the detection of many important main parameters of magnetic materials by virtue of its advantages, and gradually replace ferrite cores and become the new choice of many wireless charging manufacturers.u200b

According to statistics, the saturation state magnetic induction of amorphous Nano-M-Sheet is far more than that of ferrite core, and its anti-saturation state working ability is far superior to that of ferrite core. The magnetic induction intensity of Nano-M-Sheet raw materials does not change greatly with temperature, it is not easy to be in a state of magnetic saturation, and the temperature reliability is better than that of ferrite cores.u200b

In addition to the aluminum alloy amorphous strip, the Nano-M-Sheet raw material has the characteristics of high saturation state magnetic flux, low loss and excellent thermal conductivity. Under the same wireless charging work standard, Nano-M-Sheet The temperature of the sheet material is 7~8°C lower than that of the ferrite core. In contrast, the raw materials of ferrite cores are very easy to exceed the saturation state. In wireless charging applications, as the temperature rises, the magnetic induction decreases, the shielding characteristics decrease, the vortex increases, and the heat is more serious, resulting in polarization. The characteristics of Nano-M-Sheet raw materials are very stable below 80 ° C. With the increase of temperature, although the magnetic induction decreases, the transformation is not strong.u200b
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