CRGO Baosteel Electrical Transformer Grain Oriented Silicon Steel Sheet Lamination Core
Sep 28, 2025
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CRGO Transformer Silicon Steel Sheet Lamination Core Product Description
The core of the transformer made of silicon steel is because silicon steel itself is a magnetic substance with strong magnetic permeability. In the energized coil, it can generate a large magnetic induction intensity, which can reduce the size of the transformer.
CRGO steel has high electrical resistivity and high magnetic properties in the rolling direction. It reduces core losses in transformers and increases corrosion resistance. The core makes up the bulk of the transformer so the material used must be integral to the overall performance of the transformer.
The iron core of a transformer is laminated to reduce eddy currents. Eddy currents are the small currents that result from the changing magnetic field created by the alternating current in the first coil.
Material Properties
- High Magnetic Permeability: It exhibits excellent magnetic permeability along the rolling direction, enabling it to carry high magnetic flux density with low magnetizing force. This enhances the efficiency of transformers during electrical energy transmission and reduces energy loss.
- Low Core Loss: It has low core loss, including hysteresis loss and eddy current loss. The addition of silicon increases the material's electrical resistivity, and a specialized manufacturing process aligns the grains in a regular pattern, effectively minimizing energy loss in the core under alternating magnetic fields.
- High Electrical Resistivity: The incorporation of silicon significantly boosts the material's electrical resistivity, which helps reduce the generation of eddy currents, thereby lowering eddy current loss and improving transformer efficiency.
- Good Mechanical Properties: It possesses high mechanical elasticity, allowing it to withstand a certain degree of mechanical stress and vibration. This ensures the core maintains a stable shape and performance during transformer operation, extending its service life.
- High Degree of Orientation: Through a complex manufacturing process, the grains are highly oriented in a specific direction. This optimizes the material's magnetic properties significantly along that direction, meeting the demand for high-performance magnetic materials in transformers and other electromagnetic equipment.
Role in Transformers
- Reducing Energy Loss: Its low core loss characteristic effectively reduces energy loss during transformer operation, improving transformer efficiency, lowering operating costs, and minimizing energy waste.
- Enhancing Magnetic Flux Transmission Efficiency: High magnetic permeability allows transformers to transmit magnetic flux more efficiently, enabling efficient conversion and transmission of electrical energy and ensuring the stable operation of power systems.
- Minimizing Transformer Size and Weight: Due to the excellent magnetic properties of CRGO silicon steel sheets, less core material can be used to meet the same power transmission requirements. This reduces the size and weight of transformers, saving space and costs.
- Reducing Noise and Vibration: The low magnetostriction characteristic helps reduce noise and vibration during transformer operation, improving the operational stability and reliability of the equipment and minimizing its impact on the surrounding environment.
Grain Oriented Silicon Steel Sheet Lamination Application
Power Transformers: Widely used in power transformers for power transmission and distribution in power systems, including large-scale power transformers and small-to-medium-sized distribution transformers, to achieve efficient transmission and distribution of electrical energy.
Electronic Transformers: Also commonly used as core material in electronic transformers such as switching power supply transformers, audio transformers, and pulse transformers in electronic equipment, to meet different electrical performance requirements.
Other Electromagnetic Equipment: It can also be applied in other electromagnetic equipment such as motors, generators, reactors, instrument transformers, and magnetic amplifiers as core material, to enhance the performance and efficiency of the equipment.
Silicon Steel Sheet Lamination Core specifications
| Type | Grade | Width | Max Core Loss@P1.7T/50Hz | Lamination Factor(%) | Min Induction@B800 |
| Common Type | 23Q110 | 35-1200mm | 1.10w/kg | 97.2 | 1.82T |
| 23Q120 | 1.20w/kg | 97.2 | 1.82T | ||
| 27Q120 | 1.20w/kg | 97.5 | 1.82T | ||
| 30G120 | 1.20w/kg | 98 | 1.82T | ||
| High Induction Type |
B20P085 | 35-1200mm | 0.85w/kg | 97 | 1.86T |
| B23P085 | 0.85w/kg | 97.2 | 1.88T | ||
| B23P090 | 0.90w/kg | 97.2 | 1.88T | ||
| B23P095 | 0.95w/kg | 97.2 | 1.88T | ||
| B23P100 | 1.00w/kg | 97.2 | 1.88T | ||
| B27P095 | 0.95w/kg | 97.5 | 1.89T | ||
| B27P100 | 1.00w/kg | 97.5 | 1.89T | ||
| B30P120 | 1.20w/kg | 98 | 1.89T | ||
| Domain Refined High Induction Type(Laser) |
B20R070 | 35-1200mm | 0.70w/kg | 97 | 1.86T |
| B23R085 | 0.85w/kg | 97.2 | 1.88T | ||
| B27RK085 | 0.85w/kg | 97.5 | 1.89T |
High-Quality & Fully Assembled Cores
Maximum Weight of Automatically Stacked Core: An impressive 60 Tons
Maximum Weight of Manually Stacked Core: A robust 120 Tons
Gap Limit at the Joint: Precision engineering ensures a gap limit of less than 1mm
Window Height Precision: Exacting standards yield a precision of ±1mm
Window Width Precision: Unmatched precision with a tolerance of ±1mm
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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;
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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Over 1000 customers in domestic and overseas markets;
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Industries Served
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Transformer Applications
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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