INDUSTRY COMPONENT

Stator Core

The stator core is the stationary magnetic component in electric motors and generators that houses windings to create electromagnetic fields.

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Component Specifications

Definition
The stator core is a laminated steel structure that serves as the stationary part of rotating electrical machines. It provides a low-reluctance path for magnetic flux generated by stator windings, minimizing eddy current losses through thin insulated laminations. The core's slots hold copper or aluminum windings that, when energized, produce a rotating magnetic field to interact with the rotor.
Working Principle
The stator core operates on electromagnetic induction principles. When alternating current flows through windings in its slots, it creates a time-varying magnetic field. The laminated steel construction concentrates this magnetic flux while minimizing energy losses from eddy currents and hysteresis. This magnetic field interacts with the rotor to produce torque in motors or induce voltage in generators.
Materials
Electrical steel laminations (silicon steel, M19, M36 grades), insulation coating (C-4, C-5), varnish for bonding, copper/aluminum windings, end caps (aluminum/steel)
Technical Parameters
ParameterTypical rangeNotes & selection driver
Core Loss<2.5 W/kg at 1.5T, 50Hz
Slot Number12-72
Stack Length20-500 mm
Outer Diameter50-1000 mm
Stacking Factor0.95-0.97
Insulation ClassF (155°C) or H (180°C)
Lamination Thickness0.35-0.65 mm

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 60034, IEEE 112, ISO 8821, DIN EN 50332

Parent Products

This component is used in the following industrial products

Stator Assembly

The stationary component of an electric motor that generates a rotating magnetic field when energized.

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Stator

The stationary part of an electric motor that generates a rotating magnetic field.

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Rotor/Stator Assembly (Motor)

The core rotating and stationary electromagnetic assembly within an electric motor.

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Engineering Analysis

Risks & Mitigation
  • Magnetic saturation reducing efficiency
  • Interlamination shorts causing hotspots
  • Core vibration leading to noise/fatigue
  • Improper alignment causing air gap issues
  • Corrosion in harsh environments
FMEA Triads
Trigger: Insufficient insulation between laminations
Failure: Eddy current increase, overheating, reduced efficiency
Mitigation: Quality control of coating thickness, proper stacking pressure, varnish impregnation
Trigger: Poor stacking alignment during assembly
Failure: Increased magnetic reluctance, vibration, noise
Mitigation: Precision stacking fixtures, alignment pins, visual inspection
Trigger: Material impurities in electrical steel
Failure: Higher hysteresis losses, reduced magnetic permeability
Mitigation: Material certification, supplier quality audits, incoming inspection

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±0.05 mm for outer diameter, ±0.1 mm for stack length, ±0.5° for slot angular position
Test Method
Core loss test (Epstein frame), insulation resistance test (megohmmeter), dimensional inspection (CMM), magnetic flux density 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 Stator Core

Manufacturer profiles associated with Stator Core.

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Frequently Asked Questions

Why are stator cores laminated instead of solid?

Laminations reduce eddy current losses by breaking up conductive paths. Thin insulated steel sheets minimize circulating currents induced by changing magnetic fields, improving efficiency.

What materials are used for stator core laminations?

Electrical steel (silicon steel) with 2-3.5% silicon content is standard. Grades like M19, M36, or M43 offer specific magnetic properties. Insulation coatings (C-4, C-5) prevent interlamination shorts.

How does stator core design affect motor performance?

Core geometry, slot design, and material quality directly impact efficiency, torque characteristics, cooling, and noise levels. Proper design minimizes magnetic saturation and losses.

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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