INDUSTRY COMPONENT

Laminated Iron Core

Laminated iron core is a magnetic component in ignition transformers that reduces eddy current losses through layered construction.

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Component Specifications

Definition
A laminated iron core is a critical electromagnetic component constructed from thin, insulated sheets of silicon steel or other ferromagnetic materials stacked together. In ignition transformers, it serves as the magnetic pathway that concentrates and directs magnetic flux to efficiently induce high-voltage output. The laminated structure minimizes eddy current losses by interrupting electrical paths perpendicular to the magnetic field, while the high permeability material enhances magnetic coupling between primary and secondary windings. This component directly influences transformer efficiency, thermal performance, and voltage transformation ratio.
Working Principle
The laminated iron core operates on electromagnetic induction principles. When alternating current flows through the primary winding, it creates a time-varying magnetic field within the core. This magnetic flux is concentrated and guided by the high-permeability laminated structure to the secondary winding, where it induces a high-voltage output. The laminated construction with insulated layers prevents circulating eddy currents that would otherwise cause energy loss and heating, while the silicon steel composition provides optimal magnetic properties with minimal hysteresis loss.
Materials
Cold-rolled grain-oriented (CRGO) silicon steel sheets (typically 0.23-0.35mm thickness) with insulation coating (C-5 or C-6 grade), containing 2-3.5% silicon content for reduced hysteresis loss. Alternative materials include amorphous metal alloys for high-frequency applications or nickel-iron alloys for precision transformers.
Technical Parameters
  • Core Loss 1.2-2.5 W/kg at 1.5T, 50Hz
  • Permeability 1500-5000 μ
  • Stacking Factor 0.95-0.97
  • Lamination Thickness 0.23mm, 0.27mm, 0.35mm
  • Insulation Resistance >100 MΩ
  • Operating Temperature -40°C to 150°C
Standards
ISO 4046-4, DIN EN 60404-8-7, IEC 60404-8-7

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Laminated Iron Core.

laminated iron core ignition transformer core silicon steel laminations transformer magnetic core eddy current reduction electromagnetic components high-voltage transformer parts Laminated Iron Core in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Ignition Transformer

A high-voltage transformer that steps up the battery voltage to create the spark needed for ignition in internal combustion engines.

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Engineering Analysis

Risks & Mitigation
  • Core saturation at high currents
  • Insulation breakdown between laminations
  • Mechanical damage to thin laminations
  • Corrosion of steel sheets
  • Interlaminar short circuits
FMEA Triads
Trigger: Insufficient insulation between laminations
Failure: Increased eddy current losses leading to overheating and reduced efficiency
Mitigation: Implement quality control for insulation coating thickness and uniformity; use automated optical inspection
Trigger: Mechanical stress during assembly
Failure: Deformation of laminations causing air gaps and reduced magnetic efficiency
Mitigation: Use precision stacking fixtures; implement controlled clamping pressure during core assembly
Trigger: Material impurities or inconsistent silicon content
Failure: Increased hysteresis loss and reduced permeability
Mitigation: Source materials from certified suppliers with material traceability; implement incoming material testing

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.02mm lamination thickness, ±0.5° angular alignment, <2% variation in stacking factor
Test Method
Epstein frame test for core loss measurement, impedance testing for magnetic properties, insulation resistance testing between laminations, thermal cycling tests

Buyer Feedback

★★★★☆ 4.5 / 5.0 (33 reviews)

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"Great transparency on the Laminated Iron Core components. Essential for our Electrical Equipment Manufacturing supply chain."

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Frequently Asked Questions

Why are iron cores laminated instead of solid?

Lamination reduces eddy current losses by breaking up the electrical conduction paths perpendicular to the magnetic field. Solid cores would experience significant energy loss and overheating due to circulating currents induced by the changing magnetic flux.

What is the purpose of insulation between laminations?

The insulation coating (typically phosphate or oxide layer) electrically isolates individual sheets to prevent eddy currents from flowing between laminations, while allowing efficient magnetic flux transfer through the stack.

How does core material affect ignition transformer performance?

Silicon steel's high permeability concentrates magnetic flux efficiently, while its silicon content reduces hysteresis loss. Thinner laminations and better insulation coatings decrease eddy current losses, improving overall transformer efficiency and thermal performance.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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