The industry status and development prospects of amorphous soft magnetic alloy material

Nm (Nanocrystalline) soft magnetic alloys
Fe-based nanocrystalline alloy of iron, silicon, boron and a small amount of copper, molybdenum, niobium, etc., of which copper and niobium is essential to obtain nanocrystalline structure elements. They were first made of amorphous material, and then properly annealed to form a mixture of microcrystalline and amorphous organization. This material is cheap, but excellent magnetic properties, and amorphous alloys almost the best Co-based amorphous alloys is comparable, but not with the expensive cobalt, industrial and residential high-frequency transformer, transformers, inductors The ideal material is permalloy and ferrite generation product.
The advantages of amorphous soft magnetic alloys
Excellent magnetic properties: compared with traditional metal magnetic materials, amorphous alloys as disordered atomic arrangement, there is no crystal anisotropy, and high resistivity, it has a high permeability ferrite is more than 10 times, low loss (1/5-1/10 is silicon, ferrite loss is 1 / 2 ~ 1 / 5), is an excellent soft magnetic materials, instead of silicon steel, permalloy and ferrite transformers, etc., as core, transformers, sensors, etc., can greatly improve transformer efficiency, reduced size and weight, reduce energy consumption. In fact the magnetic properties of amorphous alloys is by far the most important applications of amorphous alloys.
Amorphous alloy in the manufacture of steel directly after spraying with a single step to produce a thin band on the finished product, saving a lot of valuable energy, while no emissions, is very beneficial to environmental protection. It is because of energy-saving manufacturing process of amorphous alloy, while its excellent magnetic properties, the process used to reduce the loss of the transformer, it is called green materials and 21st-century material.
Amorphous soft magnetic alloy material applications
Power electronics technology:
High-power, high-frequency transformer
Inverter transformer
High-power switching power supply transformer
Communication Technology:
Program-controlled switches, power
Data exchange interface components
Pulse transformer
UPS power supply filtering and storage power, power factor correction chokes, choke the standard
Anti-electromagnetic interference components:
AC, SCR, EMI differential mode, common mode inductance, the output filter inductor
Switching power supply:
Magnetic saturable reactor
Magnetic amplifier
Spike suppressor
Choke
Sensor:
Current and voltage transformers
Zero-sequence current transformer
GFCI transformer
Anti-theft sensor tags
Currently amorphous soft magnetic alloy products, applications include: transformer core, high-power inverter power transformer and the reactor core, the various forms of switching power supply transformer and inductor core, core and other various sensors.
In the low-frequency electromagnetic components, Fe-based amorphous alloys have been widely used in power distribution transformers in the application has achieved good results, as is now the largest production of amorphous alloys. In the high-frequency fields can replace the Co-based amorphous alloys and iron-nickel permalloy.
Nanocrystalline alloys is the largest power transformer core applications. Power transformer is designed on the current measurement and power transmission lines of special transformers.
From the current application and future development of domestic and international perspective, the extensive use of amorphous alloys is still in the power system:
a, distribution transformer core. Fe-based amorphous alloy core with high saturation magnetic induction, low coercivity, low loss (the equivalent of silicon steel, 1 / 3 to 1 / 5), low excitation current, good temperature stability, the amorphous alloy transformer operation during no-load loss is far lower than the silicon steel transformers. This applies in particular to load a long time, low efficiency of the rural electricity grid.
b, the power transformer core. Use a lot of power in the substation transformer, their core material is very demanding, not only for high magnetic indicators (such as high permeability, high saturation magnetic induction, low-loss, etc.), and require core materials must meet the magnetization curve conditions to ensure the transformer in the accuracy of the measurement range. In recent years, amorphous microcrystalline alloy transformer core as the increasingly widespread application of them, with very good results.
c, switching power supply transformer and inductor core. Traditional power supplies are at 50 Hz (called frequency) under the AC converted into direct current. As a result of low frequency, the transformer size, high energy consumption and low efficiency. Switching power supply is from the 1970s to develop a new type of power technology, which uses more than 20 kHz operating frequency, which greatly reduces the size of the transformer, reducing weight, improving efficiency. Use in switching power supply as the core of amorphous alloy-ceramic components are: the main transformers, control transformers, common mode inductance, noise filter, the filter inductor, inductor, choke, magnetic amplifier, peak suppressor, saturated inductance pulse compressor, switch to protect inductors.
d, GFCI transformer core. GFCI is installed in the electrical front, and people used to protect electrical devices electrical safety. When the human body due to equipment or poor insulation of electric shock when the secondary coil of the transformer induces a signal processed so jump gates, cut off the circuit protection of electrical or personal safety. In the past commonly used permalloy (Fe-Ni alloy) as the transformer core. Since the 1980s, began as a residual amorphous alloy transformer core switch, the current domestic consumption significantly.
In the power electronics field, while nanocrystalline soft magnetic alloy with high saturation magnetic induction and low high-frequency loss, and good thermal stability, high-power switching power supply is the best choice for soft magnetic materials. Nanocrystalline core transformer using the conversion of power up to 500kW, volume ratio of ferrite power transformer by 50% or more.
In civilian products, inverter technology will help save energy and reduce the size and weight, are a lot of popularity. However, negative effects can not be ignored, if the lack of necessary frequency interference suppression in part, a large number of high-order harmonic into the grid, so that the total power factor of the grid down. Reduce the power pollution is one of the most effective way to add the inverter power factor correction (PFC) sectors, which are key components of high frequency low loss, high inductance saturation magnetic induction core. Fe-based amorphous alloys in such applications has obvious advantages, green appliances in the frequency play an important role. Currently used in the inverter air conditioner amorphous PFC inductor has become a hot spot.