EI Core
Sep 17, 2025
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EI Core Product Description
"E" shapes used in "E-E" and "E-I" combinations became popular choices. "Scrapless" "E-I" patterns were developed. The electrical steel stamped out of two adjacent "E" laminations (placed leg end to leg end) to form the winding window area became the two "I" laminations to be placed across the leg ends of the "E" laminations.
Since EI-core has two open coil sides, ferrite EI core provide substantial room to bring high current lead wires out from the coil. This also permits good heat dissipation. Ferrite EI core is easier to achieve high voltage electrical. EI cores are for mains transformers possess many benefits such as low noise, low magnetising current, fast assembly, and low cost.
EI-core is widely used in various kinds of power transformer cores, power inductor cores and chokes.
EI Core Material Properties
Common materials for EI Cores include silicon steel and ferrite.
- Silicon steel EI Cores typically contain 0.5% to 4.5% silicon, featuring high magnetic permeability, low coercivity, and low hysteresis loss. These properties effectively reduce energy loss and improve circuit efficiency.
- Ferrite EI Cores, on the other hand, have high electrical resistivity, making them suitable for high-frequency operation and effective in minimizing eddy current loss.
EI Core Advantages
EI Cores offer advantages such as low noise, low magnetizing current, fast assembly speed, and low cost. Additionally, due to their structural characteristics, EI Cores make it relatively easy to achieve high-voltage electrical performance and can provide good heat dissipation.
EI Core Application
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.
30+
Types of Products
18k+
Happy Clients
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;
1,000+
Over 1000 customers in domestic and overseas markets;
core Products are exported to more than 70 countries in the world;
Gnee Iron Core Factory Overview
Meet Our Sales Manager
"The Core of the Iron Core, the Power of Leadership" - See Our Great Decision-Makers Deeply Engaged in the Magnetic Materials Industry.
Edison Zhang
CEO
Kelly Zhang
General Manager
Alex Cao
Sales Manager
Industries Served
Automobile Industry
New Energy
Transformer Applications
Our Mission
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