Amorphous and Nanocrystalline C Core E Core Block for Power Transformer
Oct 22, 2025
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Amorphous and nanocrystalline power transformer cores are high-performance magnetic cores available in C-core, E-core, and block designs, known for their high efficiency and low losses in applications like solar inverters, common mode chokes, and high-frequency transformers. Nanocrystalline cores are an advanced, higher-performance version of amorphous cores, offering superior properties like higher saturation flux density and higher permeability, leading to even smaller and more efficient transformers.
C-Core
Description: A "cut core" made by winding a ribbon of amorphous or nanocrystalline material and then cutting it into two halves to form a "C" shape.
Advantages: Allows for easy winding of coils onto the legs after assembly, and it can be used for single-phase and three-phase transformer designs.
Applications: Common mode chokes, power transformers, and current transformers.
E-Core
Description: A core formed from a ribbon of amorphous or nanocrystalline material, which is then cut into two pieces that are assembled together to form an "E" shape.
Advantages: The "E" core shape makes it easy to wind coils onto the core, and it's a common design for many power conversion applications.
Applications: Power transformers, inductors, and current transformers.
Block
Description: A core assembled from layers of ribbon to create a rectangular block shape.
Advantages: Easy to install and wind with copper wire, suitable for high-power applications.
Applications: High-frequency transformers, inductors, and common mode chokes.
Key distinctions between amorphous and nanocrystalline materials
|
Feature |
Amorphous |
Nanocrystalline |
|---|---|---|
|
Definition |
A non-crystalline (glassy) structure of rapidly cooled metal alloys. |
A nanocrystalline structure where the alloy is rapidly quenched and then annealed to create tiny crystalline grains. |
|
Saturation Flux Density |
Lower. |
Higher, enabling smaller component sizes. |
|
Permeability |
High. |
Very high, leading to higher accuracy in current transformers. |
|
Core Losses |
Lower than conventional cores. |
Lower than conventional cores and sometimes lower than amorphous cores, depending on frequency. |
|
Frequency Range |
High. |
Higher frequency applications are better suited for nanocrystalline materials. |
Amorphous and nanocrystalline c core specification
| Core Build | Window Width | Core Height | Core Width | Core Length | |||||
| a(mm) | ± | b(mm) | c(mm) | d(mm) | ± | e(mm) | ± | f(mm) | ± |
| 9 | 0.5 | 10 | 32.8 | 15 | 0.5 | 28 | 1 | 50.8 | 1.25 |
| 10 | 0.5 | 11 | 33 | 20 | 0.5 | 31 | 1 | 53 | 2 |
| 11 | 0.5 | 13 | 30 | 20 | 0.5 | 35 | 1 | 52 | 2 |
| 11 | 0.5 | 13 | 40 | 20 | 0.5 | 35 | 1 | 62 | 2 |
| 11 | 0.5 | 13 | 40 | 25 | 0.5 | 35 | 1 | 62 | 2 |
| 11 | 0.8 | 13 | 50 | 25 | 0.5 | 35 | 1 | 72 | 2 |
| 11 | 0.8 | 13 | 50 | 30 | 0.5 | 35 | 1 | 72 | 2 |
| 13 | 0.8 | 15 | 56 | 25 | 0.5 | 41 | 1 | 82 | 2 |
| 13 | 0.8 | 15 | 56 | 30 | 0.5 | 41 | 1 | 82 | 2 |
| 13 | 0.8 | 15 | 56 | 35 | 0.5 | 41 | 1 | 82 | 2 |
| 16 | 0.8 | 20 | 70 | 25 | 0.5 | 52 | 1 | 102 | 3 |
| 16 | 1 | 20 | 70 | 30 | 0.5 | 52 | 1 | 102 | 3 |
| 16 | 1 | 20 | 70 | 40 | 0.5 | 52 | 1 | 102 | 3 |
| 16 | 1 | 20 | 70 | 45 | 1 | 52 | 1 | 102 | 3 |
| 19 | 1 | 25 | 83 | 35 | 1 | 63 | 1 | 121 | 3 |
| 19 | 1 | 25 | 83 | 40 | 1 | 63 | 1 | 121 | 3 |
| 19 | 1 | 25 | 83 | 50 | 1 | 63 | 1 | 121 | 3 |
| 19 | 1 | 25 | 90 | 60 | 1 | 63 | 1 | 128 | 3 |
| 22 | 1 | 35 | 85 | 50 | 1 | 79 | 1 | 129 | 4 |
| 22 | 1 | 35 | 85 | 65 | 1 | 79 | 1 | 129 | 4 |
| 25 | 1 | 40 | 85 | 55 | 1 | 90 | 1 | 135 | 4 |
| 25 | 1 | 40 | 85 | 70 | 1 | 90 | 1 | 135 | 4 |
| 25 | 1 | 40 | 85 | 85 | 1.5 | 90 | 1 | 135 | 4 |
| 30 | 1 | 40 | 85 | 85 | 1.5 | 100 | 1 | 155 | 4 |
| 33 | 1 | 40 | 105 | 85 | 1.5 | 106 | 1 | 171 | 5 |
| Note: Additional sizes can be customized to meet specific customer requirements. | |||||||||
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Gnee provides premium iron cores to the world. Our cores can be selected in a wide range of materials, shapes, applications, manufacturing techniques, etc., to meet customers' diverse demands. Explore our wide product range now~
Manufacturing Process
1. Raw Material Sourcing
2. Slitting
3. Punching
4. Laminating
5. Core Forming
6. testing
GNEE EC
Founded in 2008 and located in Anyang in China, Gnee Electric is a high-tech enterprise specializing in researching and manufacturing iron core products.
The company currently occupies over 20,000 square meters and employs more than 200 people, including over 80 professionals. After more than 18 years of development, we have built our own magnetic material production base and independently develope, produce, and sell various kinds of iron cores. The common types include silicon steel cores, motor cores, transformer cores, toroidal iron cores, special-shaped cores, custom cores, and others. Our cores are widely applied in different sectors including transformers, motors, mutual inductors, voltage stabilizers, welding machines, magnetic amplifiers, and instrumentation, providing diverse core solutions to global customers.
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GNEE EC was founded in 2008, which is a National High-tech Enterprise & Famous Brand Enterprise in China, developing into a professional manufacturer and supplier of high-quality iron cores.
18+
Over 18 years of success in the iron core industry;
National High-tech Enterprise & Famous Brand Enterprises in China;
200+
Over 200 employees;
The R&D team has more than 80 experienced engineers and the production team has more than 100 skilled staffs;
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Annual turnover up to 35 million dollor per year;
Owns many sets of highly automatic winding, annealing, and assembling machines;
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Over 1000 customers in domestic and overseas markets;
core Products are exported to more than 70 countries in the world;
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With 18 Years of industry experience, we focus on the research, development, and manufacturing of high-quality iron cores for electricity, industrial control, new energy, and automotive markets