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.

View Specifications

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
ParameterTypical rangeNotes & selection driver
CoatingNickel, epoxy, or zinc for corrosion resistance
Coercivity≥ 10 kOe for high-grade magnets
DimensionsCustomizable (e.g., 10mm diameter x 3mm thickness)
Magnetic StrengthUp to 1.4 Tesla for neodymium magnets
Operating Temperature-40°C to 150°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 17554, DIN 17410

Parent Products

This component is used in the following industrial products

Vibration Motor Core

The Vibration Motor Core is a compact, high-torque DC motor component engineered for integration into adult wellness products that require precise vibration patterns.

View Product Details

Rotor Assembly

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

View Product Details

Torque Motor / Solenoid

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

View Product Details

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

Typical Suppliers & Equivalents

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

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Permanent Magnets

Manufacturer profiles associated with Permanent Magnets.

Sourcing Permanent Magnets from China?
Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.
Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Related Components

Contact Plate
A conductive plate in motor terminal blocks that establishes electrical contact between conductors.
Marking Strip
A durable marking strip used for terminal identification in motor terminal blocks to ensure proper electrical connections and safety compliance.
Gland Body
A gland body is the main housing component of an aluminum cable gland that provides mechanical protection and environmental sealing for electrical cables entering enclosures.
Current Sense Resistor
A precision resistor used to measure current flow in electrical circuits by converting current to a measurable voltage drop.

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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

Request Manufacturing Insight for Permanent Magnets

Thank you. Your request has been sent. We'll respond within 1–3 business days.
Sorry, we couldn't send your message. Please try again, or email us at contact@cnfx.com.
Yoke
Get QuotesChat