High Permeability Nanocrystalline C core

High magnetic induction: the saturation magnetic induction Bs=1.2T, which is twice that of permalloy and 2.5 times that of ferrite. The power density of the iron core is large, which can reach 15 kW to 20 kW/kg.


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Nanocrystalline materials also have the advantages of silicon steel, permalloy, and ferrite. which is:

1. High magnetic induction: the saturation magnetic induction Bs=1.2T, which is twice that of permalloy and 2.5 times that of ferrite. The power density of the iron core is large, which can reach 15 kW to 20 kW/kg.
2. High permeability: The initial static permeability μ0 can be as high as 120,000 to 140,000, which is equivalent to permalloy. The magnetic permeability of the iron core of the power transformer is more than 10 times that of the ferrite, which greatly reduces the excitation power and improves the efficiency of the transformer.
3. Low loss: in the frequency range of 20kHz to 50kHz, it is 1/2 to 1/5 of ferrite, which reduces the temperature rise of the iron core.
4. High Curie temperature: the Curie temperature of nanocrystalline materials reaches 570℃, and the Curie temperature of ferrite is only 180℃~200℃.

Due to the above advantages, the transformer made of nanocrystals is used in the inverter power supply, which has played a great role in improving the reliability of the power supply:

1. The loss is small and the temperature rise of the transformer is low. The long-term practical use of a large number of users has proved that the temperature rise of the nanocrystalline transformer is far lower than that of the IGBT tube
2. The high magnetic permeability of the iron core reduces the excitation power, reduces the copper loss, and improves the efficiency of the transformer. The primary inductance of the transformer is large, which reduces the impact of the current on the IGBT tube during switching.
3. The working magnetic induction is high and the power density is high, which can reach 15Kw/kg. The volume of the iron core is reduced. Especially the high-power inverter power supply, the volume reduction increases the space in the chassis, which is beneficial to the heat dissipation of the IGBT tube.
4. The overload capacity of the transformer is strong. Since the working magnetic inductance is selected at about 40% of the saturation magnetic inductance, when the overload occurs, the heat will only be generated due to the increase of the magnetic inductance, and the IGBT tube will not be damaged due to the saturation of the iron core.
5. The Curie temperature of nanocrystalline materials is high. If the temperature reaches above 100°C, the ferrite transformer can no longer work, and the nanocrystalline transformer can work normally.
These advantages of nanocrystalline have been recognized and adopted by more and more power supply manufacturers. A number of domestic manufacturers have adopted nanocrystalline iron cores and applied them for many years. More and more manufacturers are beginning to use or try it out. At present, it has been widely used in inverter welding machine, communication power supply, electroplating and electrolytic power supply, induction heating power supply, charging power supply and other fields, and there will be a greater increase in the next few years.

Application field

·Inverter reactor, transformer core
·Wide constant permeability inductor core, PFC inductor core
·Intermediate frequency transformer core/distribution
·Transformer core in medical X-ray, ultrasound, MRI.
·Transformer cores in electroplating, welding, induction heating machines.
·Inductors (chokes) for solar, wind, railway electricity.

High Permeability Nanocrystalline C core
High Permeability Nanocrystalline C core

Performance Characteristics

High saturation magnetic induction intensity and high magnetic permeability-high precision, precision, miniaturization, and high linearity of the transformer;
·Good temperature stability - can work at -55~120C for a long time.

1 High saturation induction - reduced core size
2 Rectangular form - easy to install coil
3 Low iron loss - low temperature rise
4 Good stability - can work in -20 -150 o C
5 Broadband - 20KHz to 80KHz
6 Power - 50w to 100kw.

NO.

Item

Unit

Reference value

1

(Bs)
Saturation magnetic flux density

T

1.2

2

(μi
Initial permeability

Gs/Oe

8.5×104

3

(μmax
Maximum permeability

Gs/Oe

40×104

4

(Tc)
Curie temperature

570

5

(ρ)
Density

g/ cm3

7.25

6

(δ )

Resistivity

μΩ·cm

130

7

(K)
Stacking Factor

-

>0.78

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 power grid equipment.

Parameter Curve

High Permeability Nanocrystalline C core
High Permeability Nanocrystalline C core

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