Advanced Amorphous Ring Core for Enhanced Transformer Efficiency
Oct 14, 2025
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Amorphous Ring Core Description
An Amorphous Ring Core is a specific form of Amorphous Core. Its core material remains amorphous alloy, featuring high magnetic permeability, low iron loss, and high electrical resistivity. It adopts a "ring-shaped" structure, which minimizes air gaps in the magnetic circuit, reduces magnetic reluctance, and ensures more uniform magnetic field distribution, further enhancing the stability of magnetic properties.

Amorphous alloy Ring Core Feature
Compared with amorphous cores with obvious seams (e.g., C-type and EI-type), the ring structure gives it greater advantages in specific scenarios:
Lower Hysteresis Loss and Eddy Current Loss: The seamless design reduces magnetic circuit interruptions and avoids additional losses caused by magnetic field distortion at the seams. This advantage is particularly prominent in medium-to-high frequency scenarios (e.g., tens of kHz to hundreds of kHz).
Higher Magnetic Permeability and Stability of Magnetic Properties: The ring-shaped magnetic circuit has good closure and low magnetic reluctance. It can generate a stronger magnetic field under the same excitation conditions, with uniform magnetic field distribution, making it suitable for scenarios requiring high signal accuracy.
Smaller Size and Better Heat Dissipation: The ring structure ensures high material utilization, resulting in a smaller size compared to traditional cored cores with seams under the same performance. Additionally, the ring-shaped surface has a relatively larger heat dissipation area, which helps reduce operating temperature.
Amorphous Toroidal Core Application
- High-frequency inductors/chokes: Such as filter inductors in new energy vehicle OBCs (On-Board Chargers) and photovoltaic inverters, which require low loss at high frequencies.
- Precision transformers/sensors: Such as current transformers and voltage transformers, which use high magnetic permeability and low magnetic noise to improve signal measurement accuracy.
- High-frequency transformers: Such as high-frequency transformers in communication power supplies and medical equipment power supplies, which require core solutions with small size and high efficiency.
Amorphous Ring Core specification
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| Magnetic core size(mm) | Protective box size(mm) | Effective cross-sectional area Ae(mm2) | Magnetic path length Ie(mm) | Maximum DC overcurrent class (A) |
||||||
| id | od | ht | ID | OD | HT | |||||
| 14 | 19 | 6.5 | 12 | 22 | 8 | 11.86 | 51.81 | 20 | ||
| 14 | 20 | 10 | 12 | 22.3 | 11.4 | 29.68 | 52.29 | 40 | ||
| 16 | 21 | 10 | 15 | 24 | 12.3 | 24.85 | 57.41 | 60 | ||
| 16 | 23 | 8 | 15 | 24 | 9.7 | 20.44 | 61.23 | 60 | ||
| 16 | 23 | 10 | 15 | 24 | 12.3 | 34.62 | 59.92 | 60 | ||
| 17 | 22 | 10 | 15.3 | 24.4 | 12.3 | 24.86 | 60.59 | 60 | ||
| 17 | 21 | 8 | 15.3 | 24 | 9.7 | 25.56 | 60.67 | 60 | ||
| 17 | 23 | 8 | 15.3 | 24.4 | 9.7 | 26.89 | 61.34 | 60 | ||
| 18 | 23 | 10 | 16.4 | 24.4 | 12.3 | 29.78 | 60.38 | 70 | ||
| 18 | 24 | 9 | 16.4 | 25 | 11.2 | 34.78 | 60.89 | 70 | ||
| 18 | 25 | 10 | 16.4 | 25.9 | 12.3 | 37.97 | 64.56 | 70 | ||
| 19 | 24 | 9 | 17.3 | 25 | 11.2 | 40.39 | 65.32 | 80 | ||
| 19 | 25 | 10 | 17.3 | 26 | 12.3 | 39.42 | 62.31 | 80 | ||
| 19 | 26 | 10 | 17.3 | 27.3 | 12.3 | 48.32 | 69.56 | 80 | ||
| 20 | 25 | 10 | 18.5 | 26.3 | 12.3 | 39.29 | 70.32 | 90 | ||
| 20 | 28 | 10 | 18.5 | 29 | 12.3 | 45.76 | 73.88 | 90 | ||
| 20 | 32 | 10 | 18.5 | 32.3 | 12.3 | 58.91 | 78.75 | 90 | ||
| 21 | 29 | 10 | 18.2 | 31.3 | 12.3 | 39.65 | 77.19 | 100 | ||
| 21 | 26 | 8 | 18.3 | 27.4 | 9.7 | 46.54 | 78.32 | 100 | ||
| 21 | 28 | 10 | 18.3 | 30 | 12.3 | 50.39 | 77.45 | 100 | ||
| 22 | 28 | 10 | 20.5 | 30 | 12.3 | 49.32 | 79.89 | 120 | ||
| 22 | 32 | 10 | 20.5 | 33.4 | 12.3 | 43.58 | 73.43 | 120 | ||
| 23 | 32 | 10 | 21.3 | 33.4 | 12.3 | 44.56 | 74.56 | 120 | ||
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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.
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Over 18 years of success in the iron core industry;
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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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Over 1000 customers in domestic and overseas markets;
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