Core Lamination: Thickness 0.2mm - 0.5mm

Component Specifications

Definition

Core lamination refers to the process of assembling multiple thin, insulated steel laminations into a solid core structure for electromagnetic applications. In stator/sensor heads, these laminations are precisely stacked and bonded to form the magnetic circuit, minimizing eddy currents that cause energy loss and heat generation. The laminations are typically coated with insulating materials and arranged to optimize magnetic flux paths while maintaining structural integrity under operational stresses.

Working Principle

Core laminations work by reducing eddy currents through electrical insulation between thin steel sheets. When alternating magnetic fields pass through the core, induced currents are confined to individual laminations due to the insulating layers, significantly lowering energy losses compared to solid cores. This improves efficiency, reduces heating, and enhances the performance of electromagnetic devices like motors and sensors.

Materials

Electrical steel (silicon steel, grades like M-19, M-36, or non-oriented grades), typically 0.2mm to 0.5mm thick, with insulation coatings (e.g., C-4, C-5 phosphate, or organic coatings).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Core Loss	< 2.5 W/kg at 1.5T, 50Hz
Thickness	0.2mm - 0.5mm
Permeability	> 1500 H/m
Stacking Factor	0.95 - 0.98
Flatness Tolerance	±0.05 mm
Insulation Resistance	> 100 MΩ

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

Standards

IEC 60404-8-7, DIN EN 10106

Parent Products

This component is used in the following industrial products

Stator/Sensor Head

The stationary component of a position encoder/resolver that houses the sensing elements for detecting rotational position.

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Engineering Analysis

Risks & Mitigation

Insulation breakdown leading to increased eddy currents
Mechanical deformation during stacking
Corrosion if coatings are compromised
Thermal stress causing delamination

FMEA Triads

Trigger: Poor insulation coating application
Failure: Increased eddy current losses and overheating
Mitigation: Implement quality control for coating thickness and uniformity, use standardized testing (e.g., insulation resistance checks)

Trigger: Inaccurate stacking alignment
Failure: Reduced magnetic efficiency and mechanical instability
Mitigation: Use precision stacking fixtures and automated alignment systems, conduct regular dimensional inspections

Trigger: Material impurities in electrical steel
Failure: Higher core loss and degraded electromagnetic properties
Mitigation: Source materials from certified suppliers, perform material testing per ISO/IEC standards

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerances per ISO 2768-m, flatness within ±0.05mm, stacking alignment within ±0.1mm

Test Method

Core loss testing per IEC 60404-2, insulation resistance per ASTM D257, dimensional checks via CMM or optical measurement

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 Core Lamination

5 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.

iMotorcore

Ningbo, Zhejiang, CN

Also makes: Stator Assembly, Pump Motor, Centrifugal Pump Impeller and 2 more