INDUSTRY COMPONENT

Rotor Core/Lamination

Laminated steel core forming the magnetic circuit in electric motor/generator rotors

View Specifications

Component Specifications

Definition
A rotor core, also called rotor lamination, is the central rotating component in electric machines that consists of thin, insulated steel sheets stacked and bonded together to form a cylindrical core. It serves as the magnetic flux carrier and mechanical support for rotor windings or permanent magnets, minimizing eddy current losses through its laminated construction while providing structural integrity under high rotational speeds and electromagnetic forces.
Working Principle
The rotor core operates on electromagnetic induction principles. When subjected to a rotating magnetic field from the stator, the laminated steel core channels magnetic flux efficiently, inducing torque in wound rotors or interacting with permanent magnets. The laminations (typically 0.35-0.65mm thick) are insulated with oxide or coating to reduce eddy currents, while the stacked design provides mechanical strength and thermal stability during operation.
Materials
Cold-rolled non-oriented silicon steel (CRNGO) grades like M250-35A, M400-50A; thickness 0.35mm, 0.5mm, or 0.65mm; insulation coating: C-5 organic, C-6 inorganic, or hybrid coatings; stacking adhesive: epoxy, welding, or interlocking.
Technical Parameters
  • Core Loss 2.5-8.0 W/kg at 1.5T/50Hz
  • Stack Height 20-300 mm
  • Material Grade M250-35A to M800-65A
  • Outer Diameter 50-500 mm
  • Stacking Factor 0.95-0.98
  • Lamination Thickness 0.35-0.65 mm
  • Insulation Resistance >100 Ω·cm²
Standards
ISO 16834, IEC 60404-8-4, DIN EN 10106

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Rotor Core/Lamination.

rotor core rotor lamination electric motor rotor laminated steel core silicon steel rotor motor components generator rotor electromagnetic core Rotor Core/Lamination Rotor Core/Lamination in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Rotor

The rotating component of a position encoder/resolver that generates or modulates the signal used to determine angular position.

View Product Details

Engineering Analysis

Risks & Mitigation
  • Magnetic saturation
  • Eddy current overheating
  • Mechanical deformation at high speeds
  • Insulation breakdown
  • Corrosion in harsh environments
FMEA Triads
Trigger: Poor lamination insulation
Failure: Increased eddy currents leading to overheating and efficiency loss
Mitigation: Use certified insulation coatings and maintain coating integrity during stamping
Trigger: Inadequate stacking pressure
Failure: Core vibration and noise during operation
Mitigation: Implement controlled stacking processes with proper bonding/adhesive application
Trigger: Material impurities or incorrect grade
Failure: Reduced magnetic performance and premature saturation
Mitigation: Verify material certifications and implement incoming material inspection

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.05mm on diameter, ±0.1mm on stack height, angular alignment within 0.5°
Test Method
Magnetic testing per IEC 60404-2, dimensional inspection with CMM, insulation resistance testing per ASTM D149

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

Related Components

Inspection Frame
Structural support component in automated fabric inspection systems that holds cameras, sensors, and lighting for defect detection.
Machine Frame
The rigid structural foundation of a CNC wood router that provides stability, vibration damping, and precision alignment for cutting operations.
pH Sensor Assembly
Precision pH sensor assembly for automated monitoring and dosing systems in industrial applications
Load Cell Assembly
Precision load cell assembly for automated powder dispensing systems

Frequently Asked Questions

Why are rotor cores laminated instead of solid?

Laminations reduce eddy current losses by insulating thin steel sheets, improving efficiency and reducing heating in AC machines.

What materials are used for rotor laminations?

Non-oriented silicon steel is standard due to its high magnetic permeability and low core loss, with thicknesses typically 0.35mm or 0.5mm.

How are rotor laminations assembled?

Sheets are stamped, coated, stacked precisely, and bonded using adhesives, welding, or interlocking features, then machined to final dimensions.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Request Manufacturing Insight for Rotor Core/Lamination

Rotor Core Rotor Mounting Interface