Grain Oriented Electrical Steel Transformer Laminations in China
We are a professional manufacturer of grain oriented electrical steel transformer laminations in China, supplying high-quality GOES laminations for global transformer applications. We offer a wide range of GOES material grades and thickness options, typically from 0.23 mm to 0.35 mm.
Transformers are the largest application of grain oriented electrical steel, where the core is built by stacking thin insulated laminations. This structure is designed to minimize eddy current losses and improve energy efficiency. Each lamination is insulated to prevent eddy currents that would otherwise generate heat and reduce performance.
Grain Oriented Electrical Steel Transformer Core Lamination We Manufactured
We manufacture a wide range of grain oriented electrical steel transformer laminations to meet different transformer designs and performance requirements.
Our products include EI transformer laminations (GOES), E & I transformer core laminations, step-lap transformer cores, custom GOES laminations, and toroidal transformer core laminations. We can supply both loose laminations and fully assembled transformer cores.
Materials for GOES Transformer Core Laminations
We can provide a wide range of GOES steel grades and grain oriented electrical steel thickness options to meet different laminations performance requirements. We use CRGO grades supplied by leading mills such as Baosteel, WISCO, and Shougang.
Manufacturing Process of GOES Transformer Lamination
We offer multiple manufacturing processes to meet different production volumes, precision requirements, and project stages, from prototyping to mass production. Our capabilities ensure high accuracy, stable quality, and optimized performance for transformer core laminations.
Laser Cutting Transformer Laminations
For prototypes and small batches, we provide laser cutting. It provides high precision and fast turnaround without the need for tooling.
Wire EDM Transformer Core
Also, we provide wire EDM process, it is ideal for complex geometries. WEDM delivers ultra-high precision with no mechanical stress, ensuring excellent edge quality.
Stamping Transformer Laminations
For large-scale production, we provide progressive stamping and compound stamping. Stamping offers high efficiency, consistent quality, and cost-effective manufacturing using progressive dies.
Bonded Stacking (In-Die Bonding)Technology for GOES transformer Core
We have advanced in-die bonding technology using high-speed progressive dies, replacing traditional welding or riveting methods. During stamping, adhesive is automatically applied to bond laminations together, forming a bonded transformer core with high strength and rigidity. This process eliminates welding points, improves surface flatness, and enhances insulation between laminations.
As a result, adhesive laminations achieve a higher stacking factor, reduced vibration, and lower eddy current losses, ensuring better overall transformer performance.
FAQ – Grain Oriented Electrical Steel Transformer Laminations
The most common thickness for GOES transformer laminations ranges from 0.23 mm to 0.35 mm. Thinner materials (such as 0.23 mm) provide lower core loss and higher efficiency, while slightly thicker options (0.27–0.35 mm) offer better cost balance for standard applications.
A step-lap transformer core is a design where laminations are overlapped in steps rather than aligned in a straight line. This structure improves magnetic flux distribution, reduces flux leakage, and significantly lowers core loss and noise.
We can reduce the core loss by using high-grade GOES material, selecting thinner laminations, applying high-quality insulation coating. Also, we can optimize the core design (such as step-lap structure), and control burr height to avoid inter-laminar short circuits.
GOES laminations are typically coated with an insulation layer (such as C5 coating). This coating prevents electrical contact between laminations, reduces eddy current losses, and improves the overall efficiency and durability of the transformer core.
Get a Quote for Grain Oriented Electrical Steel Transformer Laminations
Send us your drawings and specifications to receive a fast and accurate quotation. Please specify your required material grade and thickness, and our team will respond within 24 hours with a competitive price and technical support.