When it comes to oil immersed transformer series, understanding the materials used in their cores is crucial for both industry professionals and potential buyers. As a trusted supplier of oil immersed transformer series, I'm excited to share in - depth knowledge about the core materials and their significance.
1. Silicon Steel
Silicon steel, also known as electrical steel, is the most commonly used material in the core of oil - immersed transformers. This is due to its excellent magnetic properties. Silicon steel has a high magnetic permeability, which means it can easily conduct magnetic flux. This property reduces the amount of energy lost as heat during the magnetization and demagnetization process.
When an alternating current passes through the transformer's winding, it creates a changing magnetic field. The core needs to efficiently carry this magnetic field to transfer energy from the primary winding to the secondary winding. Silicon steel's low core loss characteristic is vital here. Core loss consists of hysteresis loss and eddy - current loss.
Hysteresis loss occurs because the magnetic domains in the core material need to realign with the changing magnetic field. Silicon steel has a narrow hysteresis loop, which means less energy is wasted in this realignment process. Eddy - current loss, on the other hand, is caused by the induced currents in the core material itself. To reduce eddy - current loss, silicon steel is usually made into thin laminations. These laminations are insulated from each other, which breaks up the path of the eddy currents and thus reduces the loss.
Our Nx1 Oil - immersed Transformer uses high - quality silicon steel in its core. This ensures high efficiency and reliable performance, making it suitable for a wide range of applications, from industrial power distribution to commercial buildings.
2. Amorphous Metal
Amorphous metal is another advanced material that is increasingly being used in the cores of oil - immersed transformers. Unlike silicon steel, which has a crystalline structure, amorphous metal has a disordered atomic structure. This unique structure gives amorphous metal extremely low core losses.
The core loss of amorphous metal can be up to 70% lower than that of traditional silicon steel. This significant reduction in core loss leads to lower operating costs over the long term. In addition, amorphous metal has a high saturation flux density, which allows for a more compact transformer design.
However, amorphous metal also has some limitations. It is more brittle than silicon steel, which makes it more difficult to process. Also, it is generally more expensive. Despite these challenges, the long - term energy savings make it an attractive option for many applications. Our Nx2 Oil - immersed Transformer incorporates amorphous metal in its core, offering high - efficiency performance for applications where energy conservation is a top priority.
3. Nanocrystalline Alloys
Nanocrystalline alloys are a relatively new class of materials for transformer cores. These alloys consist of nanoscale crystalline grains embedded in an amorphous matrix. This unique microstructure combines the advantages of both amorphous and crystalline materials.
Nanocrystalline alloys have very high magnetic permeability, even higher than that of silicon steel. This results in lower magnetizing current and reduced core loss. They also have excellent thermal stability, which means they can maintain their magnetic properties over a wide range of temperatures.
Compared to amorphous metal, nanocrystalline alloys are less brittle and easier to process. However, they are still relatively expensive. Our Nx3 Oil - immersed Transformer uses nanocrystalline alloys in its core for applications that require high - performance and high - precision energy transfer.
4. Design Considerations for Core Materials
The choice of core material depends on several factors. Cost is an important consideration. Silicon steel is generally the most cost - effective option, especially for large - scale production. Amorphous metal and nanocrystalline alloys are more expensive but offer significant energy savings, which can offset the initial investment over time.
The application requirements also play a crucial role. For applications where energy efficiency is the main concern, such as in power grids or large industrial plants, amorphous metal or nanocrystalline alloys may be the better choice. For less demanding applications, silicon steel can provide a good balance between performance and cost.
The size and weight of the transformer are also factors. Amorphous metal and nanocrystalline alloys allow for more compact designs, which can be beneficial in applications where space is limited.
5. Quality Control and Testing
As a supplier of oil - immersed transformer series, we place great emphasis on quality control and testing of the core materials. Before using any material in our transformers, we conduct a series of tests to ensure its magnetic properties, electrical conductivity, and mechanical strength meet our strict standards.
We use advanced testing equipment to measure the core loss, magnetic permeability, and saturation flux density of the materials. We also perform visual inspections and non - destructive testing to check for any defects in the material. Only after passing all these tests can the materials be used in the production of our transformers.
6. Contact for Procurement
If you are interested in our oil - immersed transformer series and want to learn more about the core materials or place an order, we are here to assist you. Our team of experts can provide detailed technical information and help you choose the right transformer for your specific needs. Whether you need a transformer with high - efficiency silicon steel core, an energy - saving amorphous metal core, or a high - performance nanocrystalline alloy core, we have the solutions for you. Contact us today to start the procurement process and take advantage of our high - quality products and excellent customer service.
References
- Grover, F. W. (1946). Inductance Calculations: Working Formulas and Tables. Dover Publications.
- Chapman, S. J. (2012). Electric Machinery Fundamentals. McGraw - Hill Education.
- International Electrotechnical Commission (IEC). (2019). IEC 60076 - 1: Power transformers - Part 1: General.
