INDUSTRY COMPONENT

Stator Laminations

Stator laminations are thin, stacked steel sheets forming the stationary magnetic core in electric motors, reducing eddy current losses.

Component Specifications

Definition
Stator laminations are precision-stamped electrical steel sheets that are stacked and bonded to create the stator core in electric motors and generators. They provide a low-reluctance path for magnetic flux while minimizing energy losses through insulation between layers. The laminations feature precisely shaped slots to accommodate stator windings and maintain consistent air gaps with the rotor.
Working Principle
Stator laminations work by concentrating and directing magnetic flux generated by stator windings. The laminated structure prevents circulating eddy currents that would occur in solid metal cores, reducing heat generation and improving efficiency. Magnetic flux passes through the steel while electrical currents are confined to the windings.
Materials
Non-oriented electrical steel (NOES) grades such as M250-35A, M400-50A, or silicon steel alloys with 2-3.5% silicon content. Thickness typically ranges from 0.35mm to 0.65mm with insulation coatings of C-4, C-5 organic or inorganic types.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Core Loss≤ 4.0 W/kg at 1.5T, 50Hz
Thickness0.5mm
Burr Height≤ 0.03mm
Material GradeM400-50A
Stacking Factor≥ 0.97
Flatness Tolerance≤ 0.1mm/100mm
Insulation Resistance≥ 100 Ω·cm²

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 16124, IEC 60404-8-7, DIN EN 10106

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Magnetic saturation leading to efficiency drop
  • Interlamination short circuits reducing insulation
  • Mechanical deformation affecting air gap consistency
  • Corrosion in humid environments
  • Resonance vibrations at specific frequencies
FMEA Triads
Trigger: Insufficient insulation coating thickness or damage
Failure: Increased eddy current losses and overheating
Mitigation: Implement automated coating thickness measurement and visual inspection systems
Trigger: Improper stacking pressure during assembly
Failure: Reduced stacking factor and increased magnetic reluctance
Mitigation: Use controlled-pressure stacking fixtures with pressure monitoring
Trigger: Material impurities or inconsistent grain orientation
Failure: Localized magnetic saturation and uneven flux distribution
Mitigation: Implement material certification and magnetic property testing for each batch

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Slot dimensions ±0.05mm, outer diameter ±0.1mm, angular alignment ±0.5°
Test Method
Epstein frame testing per IEC 60404-2 for magnetic properties, insulation resistance testing per ASTM A976, dimensional verification with CMM

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Stator Laminations

6 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

JYSTATOR
Dongguan, Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “stator laminations”
View source page ↗ jystator.com · checked 2026-09-04
Lam365
Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Stator Laminations”
View source page ↗ lam365.com · checked 2026-08-31
Lamistacks
Zhejiang, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Stator Laminations”
View source page ↗ lamistacks.com · checked 2026-08-31
Lammotor
Jiaxing, Zhejiang, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Stator Laminations”
View source page ↗ lammotor.com · checked 2026-08-31
Lamnow
Foshan, Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Stator Laminations”
View source page ↗ lamnow.com · checked 2026-09-14
Motorneo
Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Stator Laminations”
View source page ↗ motorneo.com · checked 2026-08-31

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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Frequently Asked Questions

Why are stator cores laminated instead of solid?

Lamination reduces eddy current losses by breaking up conductive paths. Solid cores would generate significant heat from circulating currents in changing magnetic fields, reducing efficiency by 15-25%.

What materials are used for stator laminations?

Non-oriented electrical steel with silicon content (2-3.5%) is standard. Silicon increases electrical resistivity while maintaining magnetic permeability. Coatings provide interlamination insulation.

How are stator laminations manufactured?

Manufacturing involves precision blanking/punching of electrical steel coils, deburring, insulation coating application, stacking with interlocking features or bonding, and heat treatment for stress relief.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

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