INDUSTRY COMPONENT

Electrical Steel Lamination

Electrical steel laminations are thin, insulated sheets stacked to form the core of electric motor stators, reducing eddy current losses and improving efficiency.

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Component Specifications

Definition
Electrical steel laminations are precision-stamped or laser-cut thin sheets made from silicon steel alloys, typically 0.2-0.7 mm thick, with an insulating coating. They are stacked and bonded to form the stator core in electric motors, transformers, and generators. The laminations minimize eddy current losses by interrupting electrical paths, while their high magnetic permeability enhances flux conduction. Key properties include low core loss, high saturation induction, and good mechanical strength for winding support.
Working Principle
Electrical steel laminations work by reducing eddy currents through insulation between layers, directing magnetic flux efficiently in the stator core. When alternating current flows through stator windings, it creates a rotating magnetic field. The laminated core provides a low-reluctance path for this flux, minimizing energy losses as heat. The insulation (e.g., oxide or phosphate coating) prevents circulating currents between sheets, while the silicon steel alloy reduces hysteresis losses.
Materials
Cold-rolled non-oriented silicon steel (e.g., M250-35A, M400-50A) or grain-oriented silicon steel for specific applications. Silicon content: 1-3.5%. Insulation: C-5 organic coating, C-6 inorganic coating, or hybrid. Thickness: 0.2 mm, 0.35 mm, 0.5 mm, or 0.65 mm standard grades.
Technical Parameters
  • Core Loss 2.5-4.5 W/kg at 1.5T, 50Hz
  • Permeability 1500-5000 μ
  • Stacking Factor 0.95-0.97
  • Coating Resistance >10 Ω·cm²
  • Flatness Tolerance <0.2 mm/m
  • Saturation Induction 1.8-2.0 T
Standards
ISO 683-17, IEC 60404-8-7, ASTM A876, DIN EN 10106

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Electrical Steel Lamination.

electrical steel lamination motor stator core silicon steel sheets eddy current reduction ISO 683-17 core loss non-oriented steel Electrical Steel Lamination in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Electric Motor Stator Lamination Stack

Precisely stacked and bonded electrical steel laminations forming the stationary magnetic core of an electric motor.

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Engineering Analysis

Risks & Mitigation
  • Core loss exceeding specs due to poor material grade
  • Insulation breakdown causing interlamination shorts
  • Burrs or deformation affecting stacking and air gaps
  • Corrosion in humid environments degrading performance
FMEA Triads
Trigger: Inadequate insulation coating or damage during handling
Failure: Increased eddy currents, overheating, reduced motor efficiency
Mitigation: Use certified materials with proper coating, implement quality checks (e.g., resistance testing), handle with protective packaging
Trigger: Improper stacking or misalignment during assembly
Failure: Increased magnetic reluctance, vibration, noise, and mechanical stress
Mitigation: Precision stacking fixtures, laser alignment tools, and torque-controlled fastening
Trigger: Material impurities or incorrect silicon content
Failure: High hysteresis losses, reduced permeability, overheating
Mitigation: Source from certified suppliers, conduct material certification (e.g., spectrography), adhere to ISO 683-17 standards

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.05 mm thickness, ±0.1 mm dimensional for stamping; flatness within 0.2 mm/m per ISO 683-17
Test Method
Epstein frame test for core loss and permeability per IEC 60404-2; coating resistance per ASTM A976; dimensional checks with CMM or laser scanning

Buyer Feedback

★★★★☆ 4.6 / 5.0 (30 reviews)

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Electrical Equipment Manufacturing sector, I confirm this Electrical Steel Lamination meets all ISO standards."

"Standard OEM quality for Electrical Equipment Manufacturing applications. The Electrical Steel Lamination arrived with full certification."

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Frequently Asked Questions

Why are electrical steel sheets laminated instead of solid?

Laminations reduce eddy current losses by insulating layers, preventing circulating currents that cause heating and efficiency drops in AC applications.

What is the difference between non-oriented and grain-oriented electrical steel?

Non-oriented steel has uniform magnetic properties in all directions, used for rotating machines like motors. Grain-oriented steel has enhanced magnetic properties in one direction, ideal for transformers.

How are laminations bonded in a stator stack?

Methods include welding, interlocking tabs, adhesive bonding, or stacking under pressure with end plates, ensuring mechanical integrity and minimal air gaps.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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