Product Overview
Designed for demanding industrial environments, these high-remanence, corrosion-resistant U-shaped magnets are optimized for motor and generator applications that require precise magnetic alignment and stable flux control. The curved geometry enables accurate fitting around rotors or stators, supporting uniform magnetic flux distribution and efficient energy conversion.
Manufactured from high-performance rare earth NdFeB material, these magnets deliver strong torque output and long-term magnetic stability. They are widely used in electric vehicles, wind power systems, and industrial automation equipment, where reliability, efficiency, and durability are critical to system performance.
Material Neodymium (NdFeB)
|
Product Name |
corrosion resistant u-shaped magnets |
|
Magnetic Grade |
N42 (Br ≥ 13.5 kGs, Hcj ≥ 12 kOe) |
|
Inner radius (IR) |
4mm |
|
Outer Radius (OR) |
6mm |
|
Thickness |
10mm |
|
Dimensional Tolerance |
Length ±0.05mm, Width ±0.05mm, Thickness ±0.05mm |
|
Operating Temperature |
≤80°C (high-temp version available) |
|
Density |
≥7.5 g/cm³ |
|
Surface Magnetic Field |
3800 ±200 Gauss (measured with TM-801 Gauss meter) |
|
Magnetic Flux |
2.3 mWb (measured with fluxmeter) |
Appearance & Dimensional Inspection
3.1 Appearance Inspection
Each magnet is visually inspected to ensure the surface is free from cracks, chips, edge breakage, and visible structural defects.
Surface coatings are checked for continuity, uniformity, and adhesion, with no peeling, blistering, pinholes, or exposed base material.
Corners, chamfers, and edges are examined to confirm they meet design requirements and reduce the risk of damage during handling or assembly.
Surface cleanliness is verified to ensure no oil residue, dust, or foreign contamination is present.
▲ 3.2 Dimensional Inspection
Critical dimensions such as length, width, thickness, diameter, or slot features are measured using calibrated measuring instruments.
Dimensional tolerances are verified against approved drawings and technical specifications.
Flatness, parallelism, and perpendicularity are inspected where required to ensure proper fit and alignment in assemblies.
Measurements are performed according to defined inspection plans to ensure batch consistency.
Application Scenarios and Solutions
Rather than listing industries only, this section links application requirements with recommended magnetic solutions.
4.1 Motor Applications
Servo Motors
Key Requirements
High torque density
Controlled temperature rise
Long-term performance stability
Recommended Grades
N42SH / N45SH / N48UH
Common Challenges & Solutions
Risk: Demagnetization under continuous high temperature
Solution: Higher Hcj grades combined with optimized magnet geometry
4.2 Consumer Electronics
Loudspeakers
Key Requirements
High remanence (Br)
Acoustic consistency
Cost efficiency
Recommended Grades
N35 / N38 / N40
Common Challenges & Solutions
Risk: SPL variation between production batches
Solution: Magnetic performance sorting and magnetic circuit matching
After-Sales Service
6.1 Magnetic Performance Traceability and Consistency Assurance
- Each production batch is managed with strict magnetic performance control to ensure consistency and reliability.
- Batch-level magnetic property records (Br, Hcj, (BH)max)
- Performance consistency control between pilot runs and mass production
- Support for performance comparison in case of batch-to-batch evaluation
- This approach minimizes performance deviation risks in long-term or high-volume projects.
6.2 Quality Feedback and Root Cause Analysis
- In the event of quality concerns or performance deviations, we provide structured and transparent feedback mechanisms.
- Rapid response to quality inquiries
- Root cause analysis covering material composition, process parameters, and application conditions
- Corrective and preventive action recommendations
- Our focus is not only on resolving issues, but on preventing recurrence.
FAQ
Q1. What are the most common causes of field failure?
Corrosion due to coating failure, thermal demagnetization, mechanical cracking, and improper magnet grade selection are the most common causes.
Q2. How should NdFeB magnets be stored before assembly?
They should be stored in a dry, temperature-controlled environment with corrosion protection and magnetic shielding to prevent accidental demagnetization or physical damage.
Q3. What are key considerations for NdFeB magnets in EV motors?
High coercivity, low irreversible loss, stable flux over temperature, and resistance to demagnetization under high-speed operation are critical. Cost control through reduced heavy rare earth usage is also a major concern.
Contact Us：
Phone/WhatsApp/WeChat: +86 13829120676
Email: lena@jinconn.com
Website: www.jinconnmagnet.com
Address: Xiaohe Industrial Zone, Daojiao Town, Dongguan City, Guangdong Province, China
Hot Tags: corrosion resistant u-shaped magnets, China corrosion resistant u-shaped magnets manufacturers, factory
