INDUSTRY COMPONENT

Permanent Magnets

Permanent magnets are magnetic materials that maintain a persistent magnetic field without external power, used in vibration motor cores to generate consistent magnetic forces for mechanical vibration.

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Component Specifications

Definition
Permanent magnets are ferromagnetic or ferrimagnetic materials that retain their magnetization after being exposed to an external magnetic field, creating a stable magnetic flux. In vibration motor cores, they are precisely positioned to interact with electromagnetic coils, converting electrical energy into mechanical vibration through alternating attraction and repulsion forces. These magnets provide the foundational magnetic field required for the motor's operation, eliminating the need for continuous electrical excitation and ensuring energy efficiency.
Working Principle
Permanent magnets operate based on the alignment of magnetic domains within their material structure, producing a constant magnetic field. In a vibration motor core, when an alternating current passes through the electromagnetic coils, it creates a varying magnetic field that interacts with the permanent magnet's fixed field. This interaction generates oscillating forces (Lorentz forces) that cause the motor's moving parts to vibrate, translating electrical signals into mechanical motion for applications like haptic feedback or vibration alerts.
Materials
Typically made from rare-earth materials (e.g., neodymium iron boron, samarium cobalt), ferrites (e.g., strontium or barium ferrite), or alnico alloys. Specifications include high coercivity (resistance to demagnetization), high remanence (magnetic strength), and thermal stability up to 150°C for standard grades, with grades like N52 for neodymium offering maximum energy product.
Technical Parameters
  • Coating Nickel, epoxy, or zinc for corrosion resistance
  • Coercivity ≥ 10 kOe for high-grade magnets
  • Dimensions Customizable (e.g., 10mm diameter x 3mm thickness)
  • Magnetic Strength Up to 1.4 Tesla for neodymium magnets
  • Operating Temperature -40°C to 150°C
Standards
ISO 17554, DIN 17410

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Permanent Magnets.

permanent magnets vibration motor core neodymium magnets electromagnetic components haptic feedback magnetic materials motor vibration industrial magnets Permanent Magnets in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Vibration Motor Core

Miniature motor providing haptic feedback in adult wellness devices

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Rotor Assembly

The rotating component of an actuator motor that converts electrical energy into mechanical motion

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Torque Motor / Solenoid

Electromechanical actuator converting electrical signals into precise mechanical torque/force for valve positioning.

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Engineering Analysis

Risks & Mitigation
  • Demagnetization due to high temperatures or strong opposing fields
  • Corrosion in humid environments without protective coatings
  • Mechanical brittleness leading to cracking during assembly
FMEA Triads
Trigger: Exposure to temperatures above rated limits
Failure: Loss of magnetic strength, reduced motor vibration output
Mitigation: Use temperature-resistant materials (e.g., samarium cobalt), implement thermal sensors, and design for heat dissipation
Trigger: Improper handling or impact during installation
Failure: Physical damage (cracks or chips), leading to inconsistent magnetic fields
Mitigation: Follow handling guidelines, use protective packaging, and automate assembly processes

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.1mm for dimensional accuracy, magnetic field strength within ±5% of specified value
Test Method
Gauss meter measurements for magnetic flux, thermal cycling tests, and vibration resistance tests per ISO 17554

Buyer Feedback

★★★★☆ 4.5 / 5.0 (14 reviews)

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

"As a professional in the Electrical Equipment Manufacturing sector, I confirm this Permanent Magnets meets all ISO standards."

"Standard OEM quality for Electrical Equipment Manufacturing applications. The Permanent Magnets arrived with full certification."

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Frequently Asked Questions

What are the advantages of using permanent magnets in vibration motors?

Permanent magnets offer energy efficiency by eliminating the need for continuous power to maintain magnetic fields, provide consistent performance with high magnetic strength, and enable compact motor designs due to their high energy density.

How do temperature changes affect permanent magnets in vibration motors?

Temperature increases can reduce magnetic strength (reversible losses) or cause irreversible demagnetization if exceeding the material's Curie temperature. Proper material selection and thermal management are crucial for stable operation.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Output Protection Circuit Polarization Key