INDUSTRY COMPONENT

Magnet Assembly

Precision magnetic assembly for transducer voice coil actuation in handset audio systems

Component Specifications

Definition
A magnet assembly is a critical electromechanical component in handset transducers that generates a controlled magnetic field to drive the voice coil, converting electrical signals into mechanical vibrations for sound reproduction. It typically consists of permanent magnets, pole pieces, and a magnetic circuit structure optimized for compact audio applications.
Working Principle
Operates on electromagnetic induction principles where alternating current through the voice coil interacts with the permanent magnetic field, creating Lorentz forces that move the diaphragm to produce sound waves.
Materials
Neodymium iron boron (NdFeB) magnets, soft iron pole pieces, steel yokes, epoxy adhesives, and protective nickel-copper-nickel plating
Technical Parameters
  • Weight 0.5-2.0 g
  • Impedance 8-32 Ω
  • Dimensions Φ8-15mm × 2-4mm
  • Resonant Frequency 300-800 Hz
  • Magnetic Flux Density 0.8-1.2 T
  • Operating Temperature -20°C to 80°C
Standards
IEC 60268-5, ISO 11904-1, JIS C 5502

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Magnet Assembly.

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Magnetic field degradation over time
  • Demagnetization from high temperatures
  • Corrosion in humid environments
  • Mechanical resonance interference
  • Magnetic particle contamination
FMEA Triads
Trigger: Thermal exposure beyond material limits
Failure: Partial demagnetization reducing magnetic flux
Mitigation: Implement temperature monitoring during assembly and use thermal barrier coatings
Trigger: Improper adhesive application
Failure: Magnet detachment during vibration
Mitigation: Automated adhesive dispensing with vision inspection and shear strength testing

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.05mm dimensional, ±5% magnetic flux density, ±2° angular alignment
Test Method
Gauss meter measurements, impedance testing, frequency response analysis, thermal cycling, vibration testing per IEC 60068-2-6

Buyer Feedback

★★★★☆ 4.8 / 5.0 (12 reviews)

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Computer, Electronic and Optical Product Manufacturing sector, I confirm this Magnet Assembly meets all ISO standards."

"Standard OEM quality for Computer, Electronic and Optical Product Manufacturing applications. The Magnet Assembly arrived with full certification."

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Frequently Asked Questions

What is the primary function of a magnet assembly in handset transducers?

The magnet assembly creates a stable, concentrated magnetic field that interacts with the voice coil to convert electrical audio signals into precise mechanical diaphragm movements for sound generation.

Why are neodymium magnets preferred in modern handset transducers?

Neodymium magnets provide the highest magnetic energy density available, allowing for smaller, lighter assemblies while maintaining strong magnetic fields essential for high-quality audio reproduction in compact devices.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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