Product Specification

E-Core Lamination Stack: High-Permeability CRGO Steel for Transformers & Power Supply

Product Description

Our E-Core Lamination Stack is engineered using premium Cold-Rolled Grain-Oriented (CRGO) silicon steel, designed specifically to minimize energy loss in high-performance electrical systems. As a core component for electromagnetic induction, these stacks are manufactured through high-precision progressive die stamping to ensure consistent thickness and perfect alignment.

By utilizing advanced insulation coating technology between layers, our E-core stacks significantly reduce eddy current losses and heat generation. Whether you are manufacturing step-up/step-down transformers, UPS systems, or high-frequency power supplies, our laminations provide the high magnetic flux density and low coercivity required for maximum operational efficiency and long-term reliability in demanding industrial environments.

Key Features

• Premium CRGO Material: Sourced from top-tier silicon steel mills to ensure high magnetic permeability and low core loss.

• Precision Stamping: Manufactured with high-speed automated punching machines for tight tolerances and burr-free edges.

• High Lamination Factor: Optimized stacking processes ensure a higher density of steel, leading to smaller, more efficient transformer designs.

• Low Noise & Vibration: Precision-interlocked or welded stacks reduce magnetostriction-induced noise during operation.

• Excellent Insulation: Specialized surface treatment and C5 coating offer superior interlaminar resistance and corrosion protection.

Technical Parameters

Industrial Applications

The versatility of our E-Core Lamination Stacks makes them indispensable across various power and electronics sectors:

• Power Transformers: Core components for distribution transformers ensuring stable voltage regulation.

• Switching Power Supplies (SMPS): Ideal for high-efficiency converters used in telecommunications and server rooms.

• Uninterruptible Power Supplies (UPS): Provides the reliability needed for backup power systems in hospitals and data centers.

• Inverters & Converters: Essential for renewable energy systems, including solar and wind power grid-tie inverters.

• Voltage Stabilizers: Used in industrial-grade regulators to protect sensitive machinery from fluctuations.

Customization Services

We understand that every electrical project has unique geometry and performance requirements. We offer full-spectrum customization:

• Custom Dimensions: Tailored E-I, U-I, or specialized E-core shapes based on your CAD drawings.

• Material Selection: Choose from various grades of CRGO or non-oriented silicon steel based on your frequency and efficiency targets.

• Assembly Methods: We offer riveting, TIG welding, laser welding, or glue-bonding (back-lack) for the stack assembly.

• Annealing Services: Vacuum stress-relief annealing available to restore magnetic properties after stamping.

Support and Services

• Technical Consultation: Our engineering team assists in selecting the optimal steel grade and thickness for your specific application.

• Prototyping: Rapid prototyping for new transformer designs before moving to mass production.

• Quality Assurance: 100% inspection for dimensional accuracy and magnetic performance testing (Iron loss/Permeability).

Packing and Shipping

• Packaging: Stacks are treated with anti-rust oil, wrapped in VCI (Volatile Corrosion Inhibitor) paper, and secured in heavy-duty wooden crates or pallets to prevent moisture and physical damage.

• Shipping: We support FOB, CIF, and DDP shipping terms via sea freight, air cargo, or express (DHL/FedEx) for urgent sample orders.

• Traceability: Each batch is labeled with material certificates and inspection reports for full supply chain transparency.

FAQ (Frequently Asked Questions)

Q: What is the advantage of CRGO over CRNGO for E-cores?

A: CRGO (Grain-Oriented) steel is designed to conduct magnetic flux more efficiently in one direction, offering significantly lower core loss and higher permeability compared to CRNGO, making it ideal for stationary equipment like transformers.

Q: Can you provide the mill test certificate for the silicon steel used?

A: Yes, every shipment includes a material certificate (MTC) detailing the core loss and magnetic flux density of the specific raw material batch.

Q: What is your typical lead time for custom E-core stacks?

A: For existing tooling, the lead time is typically 7-14 days. For new custom designs requiring a new die, the lead time is approximately 25-30 days.

Q: Do you offer samples for testing?

A: Yes, we provide samples for performance verification. Contact our sales team to discuss your specification requirements.