Editorial Technical Reference

Armature Assembly

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

Technical Definition & Core Assembly

Rotating component of a vibration exciter that converts electrical energy into controlled mechanical vibration through electromagnetic interaction.

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

Product Specifications

Technical details and manufacturing context for Armature Assembly

Definition
The armature assembly is the core moving part within a vibration exciter unit, responsible for converting electrical energy into controlled mechanical vibration. It consists of a precisely balanced rotating shaft with windings that interact with the stator's magnetic field to produce oscillatory forces used in various testing and industrial applications. The assembly typically includes electrical steel laminations, copper windings, and a high-strength steel shaft. Key parameters include rated voltage (24 V DC ±10%), rated current (2.5–6.0 A), exciting force (500–3000 N), frequency range (10–60 Hz), insulation class F (per IEC 60085), coil resistance (3.2–8.5 Ω), air gap (0.3–0.8 mm), shaft diameter (20–50 mm), shaft length (150–400 mm), total weight (8–25 kg), operating temperature (-20 to 70 °C), protection class (IP54–IP65 per IEC 60529), eccentricity (0.02–0.05 mm per ISO 1940), and shaft runout (0.03–0.08 mm per ISO 1101). These values are reference ranges for typical industrial exciters and must be verified for the specific model and application. The armature assembly is selected based on required force, frequency, mounting dimensions, and environmental conditions. It interfaces with the exciter frame, stator, bearings, and mounting interface. Verification questions include checking balance grade, insulation resistance, and air gap uniformity. Maintenance signals include abnormal vibration, overheating, or increased noise. Failure boundaries include exceeding temperature limits, insulation breakdown, or mechanical fatigue.
Working Principle
When alternating current flows through the armature windings, it creates a varying magnetic field that interacts with the fixed magnetic field of the stator. This electromagnetic interaction produces rotational torque, causing the armature to oscillate and generate controlled vibration forces that are transmitted through the exciter's mounting interface. The frequency and amplitude of the vibration are determined by the current frequency and the mechanical design of the assembly.
Common Materials
Electrical steel laminations, Copper windings, High-strength steel shaft
Technical Parameters
ParameterTypical rangeNotes & selection driver
Rated Voltage24 ±10% V DCStandard for most industrial exciters
Rated Current2.5–6.0 ADepends on load and coil resistance
Exciting Force500–3000 NAdjustable via current or air gap
Frequency Range10–60 HzBelow 10 Hz output drops sharply
Insulation ClassF classMax 155 °C hot spotIEC 60085
Coil Resistance3.2–8.5 ΩAt 20 °C ambient
Air Gap0.3–0.8 mmAffects force and linearity
Shaft Diameter20–50 mmMatch to bearing bore
Shaft Length150–400 mmDepends on exciter frame
Total Weight8–25 kgInfluences mounting and handling
Operating Temperature-20–70 °CAbove 70 °C derate force
Protection ClassIP54–IP65IP65 for dusty environmentsIEC 60529
Eccentricity0.02–0.05 mmBalance grade G2.5ISO 1940
Shaft Runout0.03–0.08 mmTIR at bearing seatsISO 1101

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
  • Armature Shaft Part
    Provides structural support and rotational axis for the assembly
    Material: High-strength alloy steel
  • Armature Core Part
    Supports windings and provides magnetic path for electromagnetic interaction
    Material: Electrical steel laminations
  • Armature Windings Part
    Carry electrical current to create electromagnetic field for vibration generation
    Material: Insulated copper wire
  • Balancing Rings Part
    Ensure dynamic balance during high-speed rotation to minimize vibration
    Material: Stainless steel

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 2 bar (sealed housing dependent)
other spec: Max rotational speed: 10,000 RPM, Vibration frequency range: 5-5000 Hz, Power input: 0.5-50 kW
temperature: -20°C to +120°C (operating), up to +150°C (peak)
Media Compatibility
✓ Clean dry air ✓ Inert gas environments (e.g., nitrogen) ✓ Non-conductive fluids (with proper sealing)
Unsuitable: Conductive or corrosive fluids (e.g., saltwater, acids) due to electromagnetic interference and material degradation
Sizing Data Required
  • Required vibration force (N)
  • Operating frequency range (Hz)
  • Available electrical power supply (V, A, phase)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Insulation breakdown
Cause: Thermal degradation from overheating, moisture ingress, or electrical overstress compromising dielectric properties
Commutator wear/arcing
Cause: Mechanical abrasion from brush friction, electrical arcing due to poor brush contact, or contamination buildup
Maintenance Indicators
  • Excessive sparking at brushes during operation
  • Unusual vibration or audible humming/grinding noises during rotation
Engineering Tips
  • Implement regular infrared thermography inspections to detect abnormal heating patterns in windings and connections
  • Establish precision alignment procedures and dynamic balancing protocols to minimize mechanical stress on armature components

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 state) ANSI/EIA 364-09 (Electrical Connector/Socket Test Procedures) DIN 743-1:2012 (Calculation of load capacity of shafts and axles)

Quoted from the published standard.

Manufacturing Precision
  • Shaft diameter: +/-0.01mm
  • Commutator concentricity: 0.05mm TIR
Quality Inspection
  • High-potential (hipot) insulation test
  • Runout measurement with dial indicator

Manufacturers of Armature Assembly

Manufacturer profiles associated with Armature Assembly.

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Frequently Asked Questions

What is the function of the armature assembly in a vibration exciter?

It converts electrical energy into controlled mechanical vibration by interacting with the stator's magnetic field, producing oscillatory forces for testing and industrial applications.

What materials are typically used in the armature assembly?

Common materials include electrical steel laminations, copper windings, and a high-strength steel shaft, as listed in the directory.

What are the typical electrical parameters?

Rated voltage is 24 V DC ±10%, rated current is 2.5–6.0 A, coil resistance is 3.2–8.5 Ω, and insulation class is F per IEC 60085. These are reference ranges; confirm for your model.

How should I verify the armature assembly for my application?

Check the required exciting force, frequency range, shaft dimensions, and environmental protection class. Always confirm model-specific values and standards with the legal manufacturer or supplier.

Data Basis

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

Preliminary Technical Classification
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