Editorial Technical Reference

Generator Stator

This page explains how Generator Stator is classified within Electrical Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

The stationary part of an electrical generator that contains the windings where electrical current is induced.

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Generator Stator

Definition
The generator stator is the stationary component of an electrical generator system driven by a prime mover. It consists of a laminated iron core made of electrical steel, with copper windings placed in slots. The core is supported by a structural steel frame. When the rotor (field winding) rotates inside the stator, the changing magnetic field induces alternating current (AC) in the stator windings, converting mechanical energy from the prime mover into electrical energy. The stator is a key part in power plants and industrial generators, and its design directly affects performance, efficiency, and reliability. Typical parameters for utility generators include rated power from 100 to 1000 MW, rated voltage from 10 to 24 kV, rated speed from 1500 to 3600 rpm, efficiency from 95% to 99%, insulation class F or H, temperature rise from 80 to 125 K, number of poles from 2 to 8, core length from 1000 to 6000 mm, stator outer diameter from 2000 to 6000 mm, weight from 20 to 200 tonnes, insulation resistance greater than 100 MΩ at 25°C, vibration severity up to 2.8 mm/s RMS at the bearing, and cooling water flow from 50 to 200 m³/h for water-cooled stators. These values are reference ranges and must be verified for the specific model and application. Relevant standards include IEC 60034-1 for rating and performance, IEC 60034-2-1 for efficiency, IEC 60085 for insulation class, IEC 60034-27-1 for insulation resistance, ISO 10816-1 for vibration, and IEC 60034-6 for cooling methods. Always confirm model-specific values and compliance with the legal manufacturer or supplier.
Working Principle
The stator operates on electromagnetic induction. As the rotor's magnetic field rotates past the stationary stator windings, the changing magnetic flux induces an electromotive force (EMF) in the conductors according to Faraday's Law. This induced voltage drives alternating current through the connected electrical load. The number of poles and the rotor speed determine the output frequency. The stator's laminated core reduces eddy current losses, and the insulation system prevents electrical breakdown. Proper cooling is essential to manage heat generated by losses.
Common Materials
Electrical steel laminations, Copper winding wire, Insulation materials, Structural steel frame
Technical Parameters
ParameterTypical rangeNotes & selection driver
Rated Power100–1000 MWTypical range for utility generatorsIEC 60034-1
Rated Voltage10–24 kVHigher voltages reduce current and lossesIEC 60034-1
Rated Speed1500–3600 rpmDepends on prime mover and frequencyIEC 60034-1
Efficiency95–99 %Higher efficiency reduces fuel costIEC 60034-2-1
Insulation ClassF–HClass F max 155°C, H max 180°CIEC 60085
Temperature Rise80–125 KAbove this, insulation life degradesIEC 60034-1
Number of Poles2–8Determines speed for given frequencyIEC 60034-1
Core Length1000–6000 mmAffects power density and cooling
Stator Outer Diameter2000–6000 mmDetermines frame size and footprint
Weight20–200 tAffects foundation and transport
Insulation Resistance>100 At 25°C, minimum acceptableIEC 60034-27-1
Vibration Severity≤2.8 mm/sRMS velocity at bearingISO 10816-1
Cooling Water Flow50–200 m³/hFor water-cooled statorsIEC 60034-6

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

Components / BOM
  • Stator Core Part
    Provides low-reluctance magnetic path and houses winding slots
    Material: Electrical steel laminations
  • Stator Windings Part
    Conductors where electrical current is induced
    Material: Copper with insulation
  • Stator Frame Part
    Structural support and heat dissipation
    Material: Cast iron or steel
  • End Windings Part
    Connect phase windings and provide mechanical support
    Material: Copper with insulation and bracing

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Generator Stator.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 5 bar (sealed systems)
temperature: -40°C to 180°C (Class H insulation typical)
vibration limit: ≤ 2.5 mm/s RMS (shaft vibration)
cooling flow rate: Varies by design: Air: 0.5-5 m³/s, Hydrogen: 2-20 m³/s, Water: 10-100 L/min
Media Compatibility
✓ Clean dry air (TEFC enclosures) ✓ Hydrogen gas (sealed cooling) ✓ Deionized water (direct cooling)
Unsuitable: Saltwater/marine environments without corrosion protection
Sizing Data Required
  • Rated power output (MW/kVA)
  • Voltage and frequency requirements
  • Cooling method (air, hydrogen, water)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Insulation breakdown
Cause: Thermal aging from overheating, contamination by oil or moisture, or electrical stress from voltage surges.
Winding looseness or displacement
Cause: Electromagnetic forces during operation, thermal cycling, or mechanical vibration leading to abrasion and short circuits.
Maintenance Indicators
  • Audible humming or buzzing indicating loose windings or core vibration
  • Visible smoke, ozone smell, or discoloration of insulation signaling overheating or electrical arcing
Engineering Tips
  • Implement regular thermographic surveys to detect hot spots and ensure cooling systems are functioning optimally.
  • Perform periodic partial discharge testing and insulation resistance measurements to monitor dielectric integrity.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 8528-1:2018 - Reciprocating internal combustion engine driven alternating current generating sets IEC 60034-1:2022 - Rotating electrical machines - Rating and performance ASTM A275/A275M-21 - Standard Practice for Magnetic Particle Examination of Steel Forgings

Quoted from the published standard.

Manufacturing Precision
  • Stator bore diameter tolerance: +/-0.025 mm
  • Core stacking flatness: 0.05 mm per meter
Quality Inspection
  • High potential (hipot) test for insulation integrity
  • Partial discharge measurement for winding quality

Manufacturers of Generator Stator

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

Lammotor
Jiaxing, Zhejiang, CN
Listed on the company's own website · profile compiled by CNFX from public sources

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

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
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Frequently Asked Questions

What is the function of a generator stator?

The stator is the stationary part of a generator that houses the armature windings. It works with the rotating rotor to induce alternating current through electromagnetic induction, converting mechanical energy into electrical energy.

What materials are typically used in a generator stator?

Common materials include electrical steel laminations for the core, copper winding wire, insulation materials, and a structural steel frame. Specific grades and types must be confirmed with the manufacturer.

What standards apply to generator stators?

Relevant standards include IEC 60034-1 for rating and performance, IEC 60034-2-1 for efficiency, IEC 60085 for insulation class, IEC 60034-27-1 for insulation resistance, ISO 10816-1 for vibration, and IEC 60034-6 for cooling. These are references for verification, not proof of compliance.

How do I verify the suitability of a generator stator for my application?

Check the rated power, voltage, speed, efficiency, insulation class, temperature rise, and other parameters against your requirements. Always consult the legal manufacturer or supplier to confirm model-specific values and compliance with applicable standards.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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