Editorial Technical Reference

Rotor/Stator Assembly

This page explains how Rotor/Stator Assembly is classified within Computer, Electronic and Optical Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A critical electromechanical assembly within an X-ray tube that enables high-speed rotation of the anode target.

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

Product Specifications

Technical details and manufacturing context for Rotor/Stator Assembly

Definition
The rotor/stator assembly is the core rotating mechanism in an X-ray tube, consisting of a stationary stator (electromagnetic coils) and a rotating rotor (typically containing the anode target). It creates a rotating magnetic field that spins the anode at high speeds (typically 3,000-10,000 RPM) to distribute heat and prevent localized overheating during X-ray generation. The stator contains copper windings that, when energized with alternating current, create a rotating magnetic field. This field induces eddy currents in the rotor (which is typically made of copper or contains a copper sleeve), causing it to rotate via electromagnetic induction. The rotation spreads the electron beam impact over a larger area of the anode target. This assembly is used in computer, electronic, and optical product manufacturing, specifically in X-ray equipment. Key parameters include rated voltage (220-240 V AC), frequency (50-60 Hz), speed (3000-10000 rpm), maximum operating temperature (150°C), insulation class H, radial runout ≤0.02 mm, axial play 0.05-0.15 mm, dynamic balancing grade G2.5, insulation resistance ≥100 MΩ at 500 V DC, dielectric strength 1500 V AC for 1 minute, weight 2.5-5.0 kg. These values are reference ranges and must be verified for the specific model and application. The assembly is designed to meet standards such as IEC 60034, IEC 60085, ISO 1101, ISO 1940-1, IEC 60243, which serve as procurement and verification references. Always confirm model-specific values and standards with the legal manufacturer or supplier.
Working Principle
The stator contains copper windings that, when energized with alternating current, create a rotating magnetic field. This field induces eddy currents in the rotor (which is typically made of copper or contains a copper sleeve), causing it to rotate via electromagnetic induction. The rotation spreads the electron beam impact over a larger area of the anode target, preventing localized overheating.
Common Materials
Copper, Molybdenum, Tungsten, Stainless Steel
Technical Parameters
ParameterTypical rangeNotes & selection driver
Rated Voltage220–240 V ACStandard mains voltage for industrial equipmentIEC 60034
Rated Frequency50–60 HzCompatible with global power gridsIEC 60034
Rated Speed3000–10000 rpmHigher speed improves image qualityIEC 60034
Max Operating Temperature150 °CExceeding may degrade insulationIEC 60085
Insulation ClassHClass H allows 180°C hot spotIEC 60085
Radial Runout≤0.02 mmCritical for anode alignmentISO 1101
Axial Play0.05–0.15 mmEnsures smooth rotationISO 1101
Dynamic Balancing GradeG2.5Reduces vibration and noiseISO 1940-1
Insulation Resistance≥100 At 500 V DCIEC 60243
Dielectric Strength1500 V ACFor 1 minute without breakdownIEC 60243
Weight2.5–5.0 kgDepends on anode size

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
  • Rotor
    Rotating component that holds the anode target and rotates within the stator's magnetic field
    Material: Copper or Copper-Molybdenum alloy
  • Stator
    Stationary electromagnetic coils that create the rotating magnetic field to drive the rotor
    Material: Copper windings with electrical insulation
  • Bearings
    Support the rotor shaft and enable smooth high-speed rotation with minimal friction
    Material: Stainless steel or specialized bearing materials

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 1.5 bar absolute (vacuum to slight positive pressure)
other spec: Max rotational speed: 10,000 RPM, Vibration limit: 5G, Electrical insulation: >100 MΩ at 500VDC
temperature: -20°C to 150°C (operating), -40°C to 180°C (storage)
Media Compatibility
✓ High vacuum environment (10^-6 Torr) ✓ Inert gas atmosphere (Argon/Nitrogen) ✓ Dry air with controlled humidity (<5% RH)
Unsuitable: Liquid immersion or high particulate environments (causes bearing failure and electrical arcing)
Sizing Data Required
  • Required anode target diameter and mass (determines rotational inertia)
  • X-ray tube operating voltage and power rating (affects thermal load)
  • Desired anode cooling method (determines heat dissipation requirements)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Bearing fatigue and overheating
Cause: Inadequate lubrication, misalignment, excessive vibration, or contamination leading to premature bearing failure and thermal damage to rotor/stator components.
Winding insulation breakdown
Cause: Thermal cycling, moisture ingress, electrical overstress, or contamination causing insulation degradation, short circuits, or ground faults in stator windings.
Maintenance Indicators
  • Excessive vibration or unusual audible noise (e.g., grinding, humming) during operation
  • Overheating detected via thermal imaging or abnormal temperature rise in motor housing
Engineering Tips
  • Implement precision alignment and balancing during installation/repair, and establish a proactive lubrication program with correct grease type and intervals
  • Use condition monitoring (vibration analysis, thermography, motor current analysis) to detect early degradation and schedule maintenance before catastrophic failure

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 1940-1:2003 (Balance quality requirements for rotors in a constant rigid state) ANSI/EIA 364-100A (Electrical connectors - Rotor/stator interface testing) DIN 42955 (Tolerances for electrical machines - Rotating electrical machines)

Quoted from the published standard.

Manufacturing Precision
  • Air gap concentricity: +/-0.05mm
  • Stator bore roundness: 0.025mm
Quality Inspection
  • High-potential (hipot) dielectric strength test
  • Vibration analysis per ISO 10816

Manufacturers of Rotor/Stator Assembly

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Frequently Asked Questions

What is the typical speed range for the rotor/stator assembly?

The rated speed is typically 3,000 to 10,000 rpm, as listed in the parameters. However, the exact speed depends on the specific model and application. Always verify with the manufacturer.

What standards apply to this assembly?

Relevant standards include IEC 60034 for electrical performance, IEC 60085 for insulation, ISO 1101 for geometric tolerances, ISO 1940-1 for balancing, IEC 60243 for dielectric testing, and testing. These are references for verification, not proof of compliance.

What materials are used in the rotor/stator assembly?

The materials on file include copper, molybdenum, tungsten, and stainless steel. The rotor often contains copper or a copper sleeve, and the anode target may use tungsten. Confirm material specifics with the supplier.

How should I verify the performance of this assembly?

Check the listed parameters such as rated voltage, frequency, speed, temperature, insulation resistance, and dielectric strength against your requirements. Always request the manufacturer's datasheet and test certificates for the specific model.

Data Basis

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

Preliminary Technical Classification
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