INDUSTRY COMPONENT

Field Magnet

Field magnet is a permanent or electromagnet component in vibration exciter units that generates a stable magnetic field for electromagnetic force production.

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Component Specifications

Definition
A field magnet is a critical electromagnetic component within vibration exciter units that establishes a consistent magnetic field required for converting electrical energy into mechanical vibration. In industrial applications, it typically consists of high-grade magnetic materials arranged in specific configurations to optimize flux density and directional stability. This component works in conjunction with armatures or moving coils to generate controlled oscillatory forces through electromagnetic induction principles.
Working Principle
The field magnet operates by establishing a fixed magnetic field within the vibration exciter's electromagnetic circuit. When alternating current passes through the armature coil positioned within this field, it creates a varying electromagnetic force according to Lorentz's law (F = BIL). This force causes mechanical displacement proportional to the current's amplitude and frequency, generating controlled vibrations. Permanent magnet versions maintain constant field strength, while electromagnet versions allow adjustable field intensity through DC excitation control.
Materials
High-grade neodymium iron boron (NdFeB) magnets (N35-N52 grade), samarium cobalt (SmCo) for high-temperature applications, or laminated silicon steel cores with copper windings for electromagnet versions. Protective coatings include nickel-copper-nickel (Ni-Cu-Ni) plating or epoxy resin encapsulation for corrosion resistance.
Technical Parameters
  • Weight 0.5-15 kg depending on application
  • Coercivity ≥ 800 kA/m
  • Dimensions Customizable per exciter design
  • Field Uniformity ±5% across working gap
  • Magnetic Flux Density 0.8-1.5 Tesla
  • Operating Temperature -40°C to +150°C
Standards
ISO 19453-2, DIN EN 60529, IEC 60034

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Field Magnet.

vibration exciter field magnet electromagnetic vibration component industrial magnet specifications vibration testing equipment parts magnetic field generator Field Magnet Field Magnet in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Vibration Exciter Unit

A specialized component within a Quality Testing Station that generates controlled mechanical vibrations for product testing and validation.

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Engineering Analysis

Risks & Mitigation
  • Magnetic field interference with nearby equipment
  • Demagnetization at high temperatures
  • Corrosion in humid environments
  • Mechanical fatigue from continuous vibration
FMEA Triads
Trigger: Thermal overload exceeding Curie temperature
Failure: Partial or complete demagnetization
Mitigation: Install temperature sensors with automatic shutdown at 80% of maximum operating temperature, use high-temperature grade magnets (SmCo) for demanding applications
Trigger: Mechanical stress from vibration transmission
Failure: Magnet cracking or delamination
Mitigation: Implement shock-absorbing mounting systems, use encapsulated magnet designs, conduct regular visual inspections for cracks

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Magnetic flux density tolerance ±3%, dimensional tolerance IT7 grade, axial alignment within 0.1mm
Test Method
Gauss meter measurement per ISO 2178, thermal cycling test per IEC 60068-2-14, vibration endurance test per ASTM D3580

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the difference between permanent and electromagnetic field magnets in vibration exciters?

Permanent magnets provide constant field strength without power consumption but offer fixed intensity. Electromagnets allow adjustable field strength through DC current control but require continuous power and cooling systems. Permanent magnets are preferred for stable frequency applications, while electromagnets suit variable amplitude requirements.

How does field magnet degradation affect vibration exciter performance?

Magnet degradation reduces magnetic flux density, decreasing force output and causing inconsistent vibration amplitudes. This leads to inaccurate test results, reduced system efficiency, and potential resonance shifts. Regular flux testing and thermal monitoring are recommended for maintenance.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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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