1K107 Nanocrystalline Core Ring Type Cores for Electric Transformer
Oct 27, 2025
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The nanocrystalline ring-type iron core for electric transformers is a toroidal soft magnetic component specifically designed for power transformers. It is made from iron-based nanocrystalline alloy ribbons through continuous winding, low-temperature annealing, and precision forming processes. Its core value lies in integrating the low iron loss and high magnetic permeability of nanocrystalline materials with the closed magnetic circuit and low magnetic leakage advantages of the toroidal structure. It enables efficient magnetic energy transmission in medium-to-high frequency (50kHz-200kHz) power conversion scenarios, serving as a key magnetic core component for achieving "high energy efficiency and miniaturization" in equipment such as new energy transformers, high-frequency distribution transformers, and on-board transformers.
nanocrystalline ring-type iron core Application
The "low loss, low magnetic leakage, and miniaturization" characteristics of the nanocrystalline ring-type iron core make it widely used in medium-to-high frequency electric transformers. Key application scenarios include:
1. New Energy Vehicle Power Transformers
On-Board Charger (OBC) Transformers: Used for AC/DC conversion in new energy vehicles. Low iron loss at 50-100kHz can improve the charger's energy efficiency to over 96%, and the toroidal structure adapts to the circular or flat installation space of on-board equipment.
Traction Inverter Transformers: DC/AC conversion transformers in the drive system of new energy vehicles. Their wide temperature stability withstands high temperatures (above 120℃) during motor operation, and low magnetic leakage avoids interference with the on-board electronic control system.
2. New Energy Power Generation and Energy Storage Transformers
Photovoltaic Inverter Transformers: In grid-connected inverters of photovoltaic power plants, the low iron loss of the nanocrystalline ring-type core improves the inverter's conversion efficiency (≥98.5%), and its miniaturized design adapts to the compact chassis of the inverter.
Energy Storage Converter (PCS) Transformers: Charge-discharge conversion transformers in energy storage systems. The toroidal low magnetic leakage feature reduces interference with the energy storage battery management system (BMS), and wide temperature stability ensures long-term operation of the energy storage system outdoors.
3. High-Frequency Distribution and Industrial Power Transformers
High-Frequency Distribution Transformers: Used in high-frequency power distribution systems (50-200kHz) of data centers and precision factories. The miniaturized design saves power distribution room space, and low iron loss reduces long-term operation energy consumption.
Industrial High-Frequency Transformers: Isolation transformers in industrial frequency converters and servo systems. Their low magnetic leakage and low noise characteristics adapt to the complex electromagnetic environment of industrial workshops, ensuring stable equipment operation.
4. Special Power Transformers
Medical Equipment-Specific Transformers: Power transformers for medical equipment such as MRI nuclear magnetic resonance and CT scanners. Low iron loss reduces electromagnetic interference (EMI) and ensures the clarity of medical images; the toroidal structure has no magnetic circuit dead ends, improving the stability of the transformer's output voltage.
Aerospace Power Transformers: Miniaturized power transformers for aerospace equipment. Their high power density and vibration resistance adapt to the limited space and flight vibration environment of aircraft.
What is the iron core in a transformer?
The iron core increases the strength of the magnetic field. The magnetic field passes through (or cuts) the secondary coil. The changing magnetic field induces a changing potential difference in the secondary coil. The induced potential difference produces an alternating current in the external circuit.
What is the material of nanocrystalline core?
Nano crystalline soft magnetic material is a new development. The material composition is 82% iron with the remaining balance silicon, boron, niobium, copper, carbon, molybdenum, and nickel. Nano crystalline cores for common mode choke. The raw material is manufactured and supplied in an amorphous state.
nanocrystalline ring core specification
| 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
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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;
National High-tech Enterprise & Famous Brand Enterprises in China;
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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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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;
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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