CRGO Optimized Transformer Core Using Split Cut Soft Magnetic Silicon Steel Laminations
Sep 29, 2025
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Cold Rolled Grain Oriented Silicon Steel transformer core Product Description

Cold Rolled Grain Oriented Silicon Steel (CRGO) transformer cores are made by stacking CRGO electrical steel sheets, and their performance directly determines the energy efficiency, loss, noise, and reliability of the transformer.
CRGO transformer core Performance Advantages
Compared with cores made of ordinary electrical steel (such as non-oriented silicon steel), CRGO transformer cores have significant advantages:
- Energy Efficiency: Core loss accounts for 60% to 80% of the total transformer loss. CRGO cores can reduce the no-load loss of distribution transformers by 40% to 60%, meeting the IE3/IE4 high-efficiency standards.
- Low Noise: Magnetostriction (tiny deformation when the core is magnetized) is the main source of transformer noise. The consistent grain orientation of CRGO steel sheets can reduce the unevenness of magnetostriction, lowering operating noise by 3 to 5 dB.
- High Reliability: Low loss means less heat generation in the core and lower hot spot temperature, extending the service life of insulation materials (the service life of transformers has an exponential relationship with hot spot temperature - for every 10°C decrease in temperature, the service life doubles).
- Compact Design: High magnetic induction allows for a reduced core cross-sectional area, shrinking the transformer volume by 15% to 25%, thus saving installation space and material costs.
Silicon Steel transformer core Application
· UPS and SMPS Power Factor Correction Chokes
· UPS Harmonic Filter Inductors
· High-Power Outdoor Industrial Ballasts
· Welding Power Supplies
· High-Speed Rail Power Systems
· Choke coil for DC/DC converter
· Normal mode choke coil
· Choke coil for adapter and battery charger
· PFC choke cil
Silicon Steel transformer core specifications
|
Uasage |
Transformer Instrument |
|
Phase |
Single |
|
Material |
CRGO grain oriented electrical steel |
|
Thickness |
0.23~0.35 |
|
Max Core Loss 1.7T/50HZ |
110 |
|
Place of Origin |
Henan China |
|
Frequency |
400HZ |
|
Delivety Time |
Within 20 days |
|
Surface Treatment |
Coated |
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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.

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






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