What Is A Tape Wound Cores
Oct 16, 2025
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Tape Wound Core
Tape wound cores are a type of magnetic core used in various electrical and electronic applications. They are constructed by winding thin, continuous strips or ribbons of magnetic material, typically made of high-quality silicon steel or other magnetic alloys, into a tightly wound coil.
The winding process involves layering the strips or ribbons in a continuous manner, often with adhesive layers in between, to form a compact and uniform core structure. The individual layers are wound in a way that minimizes air gaps and maximizes the magnetic flux carrying capacity of the core.
There are different types of tape wound cores, including nanocrystalline cores, amorphous cores, mumetal cores, silicon steel cores and many more.
Uses of Tape Wound Cores
The properties of tape wound cores make them indispensable in a wide range of electrical and electronic devices. Let's look at some of the uses of tape wound cores.
1. Transformers
Tape wound cores are widely used in power transformers, distribution transformers, and specialty transformers. Some of the properties that make these cores ideal for use in transformers include their compact design and efficient magnetism. These properties contribute to high-performance power transfer, voltage regulation, and impedance matching in electrical distribution systems.
2. Aerospace Applications
These cores are also used in the aerospace industry for a wide range of purposes, including power distribution, signal transmission, managing electromagnetic compatibility, and more. The cores contribute to the safety, reliability, and functionality of aerospace systems thanks to their unique properties.
3. Inductors and Chokes
Another common application of tape wound cores is in the production of inductors and chokes. Tape wound cores are utilized in inductors and chokes to store and release energy in electrical circuits. They help filter out unwanted frequencies and reduce electromagnetic interference. In addition, they help maintain stable current flow in applications such as power supplies, filters, and motor drives.
4. Reactors
Tape wound cores are used in reactors used in various applications, including power electronics, renewable energy systems, and industrial machinery. They help control current flow, limit short-circuit currents, and maintain the stability of electrical systems.
5. E-Vehicles
Tape wound cores play a significant role in the development and operation of electric vehicles by enabling efficient power management and reliable electrical systems. E-vehicle manufacturers utilize tape wound cores for a wide range of purposes, including electric motor control, energy storage, managing electromagnetic compatibility, power conversion and more.
6. Current Sensors
Tape wound cores are also used in current sensors to measure electrical current in power distribution systems, industrial equipment, and renewable energy installations. Their high permeability and accurate magnetic characteristics enable precise current sensing and monitoring.
7. Magnetic Amplifiers
Tape wound cores play a vital role in magnetic amplifiers, which are used in control systems, signal processing, and automation. The cores enhance the amplification of signals through magnetic field manipulation, thereby enabling efficient and reliable operation in diverse applications.
8. High-Frequency Applications
Tape wound cores are favored in high-frequency applications due to their low core losses and excellent magnetic properties. They are used in telecommunications equipment, audio systems, and high-frequency power converters, where efficient energy transfer and minimal losses are essential.
9. Specialty Applications
Tape wound cores also find applications in specialized fields such as aerospace, defense, medical devices, and scientific instruments. They contribute to the efficient operation of sensitive equipment, precision measurement systems, and advanced technologies.
Advantages of Tape Wound Cores
· Tape wound cores offer efficient energy transfer and low losses; hence they are ideal for transformers and inductors.
· With customizable shapes and sizes, tape wound cores can be tailored to meet specific application requirements.
· The compact design of tape wound cores allows for space-saving integration into various electrical and electronic devices.
· Tape wound cores exhibit high magnetic flux density. This enables them to handle larger power levels.
· These cores provide stability in temperature variations. This property makes them suitable for applications with varying operating conditions.
· Their versatility allows tape wound cores to be manufactured using different magnetic materials, catering to diverse applications.
· They ensure better magnetic coupling and improved performance by reducing magnetic leakage.
· Tape wound cores offer a cost-effective solution without compromising on magnetic performance.
· They are compatible with both high-frequency and low-frequency systems.
Tape Wound 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 | ||
GNEE Featured Products
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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Why Choose GNEE EC?
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;
35+
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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Strive To Create world-class Iron core brand
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