Transmart - Professional Transformer Core Manufacturers In China Supplying Custom Nanocrystalline Core And Toroidal Transformer Core

Characteristics of Nanocrystalline Materials -

by:Transmart     2023-01-11

Characteristics of nanocrystalline materials 1. High magnetic induction: 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 high, which can reach 15 kW to 20 kW/kg. 2.
High magnetic permeability: The static initial magnetic permeability μ0 can be as high as 120,000 to 140,000, which is comparable to permalloy. The magnetic permeability of the iron core used in power transformers is more than 10 times that of 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 that of ferrite, which reduces the temperature rise of the iron core. 4. High Curie temperature: The Curie temperature of nanocrystalline materials reaches 570°C, while that of ferrite is only 180°C-200°C. Due to the above advantages, the transformer made of nanocrystalline is applied to the inverter power supply, which has played a great role in improving the reliability of the power supply: 1. The loss is small, the temperature rise of the transformer is low, and the long-term actual use of a large number of users has proved that the nanocrystalline transformer The temperature rise is much lower than that of the IGBT tube. 2. The magnetic permeability of the iron core is high, which reduces the excitation power, reduces 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 when 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 for high-power inverter power supply, the reduced volume increases the space in the chassis, which is beneficial to the heat dissipation of IGBT tubes. 4. The transformer has a strong overload capacity. Since the working magnetic inductance is selected to be about 40% of the saturation magnetic inductance, when overload occurs, it will only generate heat due to the increase in the magnetic induction, and will not damage the IGBT tube due to the saturation of the iron core. 5. The Curie temperature of nanocrystalline materials is high. Assuming that the temperature reaches above 100°C, the ferrite transformer can no longer work, but the nanocrystalline transformer can work normally. 6. There are atomic-sized nuclei on the surface of the nanocrystalline polymeric sphere, which transform the fouling substances dissolved in water into tiny nanocrystals; 7. Once the crystals grow to a certain size on the surface of the nanocrystalline polymeric sphere, they are Automatically falls off into the water, and the crystals will never scale again. 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 have used them for many years. More and more manufacturers are beginning to use or trial. At present, it has been widely used in inverter welding machine, communication power supply, electroplating electrolysis power supply, induction heating power supply, charging power supply and other fields, and there will be a greater increase in the next few years.
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