Product Overview
Linear Halbach Array
Linear Halbach array is a special permanent magnet assembly that arranges magnets with rotating magnetization directions along a straight line. This structure strengthens the magnetic field on one working side while reducing leakage flux on the opposite side, creating a more efficient and concentrated magnetic field compared with a simple magnet row.
A typical linear Halbach array includes multiple precision magnets, a non-magnetic or magnetic carrier, adhesive, positioning fixture, optional protective cover and final magnetic inspection. By controlling magnet grade, pole pitch, magnetization direction, spacing and assembly accuracy, the array can provide high surface flux density, improved field uniformity and reduced stray field.
Ningbo Vanguard Technologies supplies customized linear Halbach arrays using NdFeB, SmCo or ferrite magnets according to required field strength, working gap, operating temperature, assembly space and cost target. We support magnet grade selection, magnetization direction design, fixture bonding, magnetic field mapping, dimensional inspection and batch production.
Whether you need prototype arrays for motor testing, magnetic levitation, linear generators, sensor systems or scientific equipment, Vanguard can provide sample assembly within 10-20 days after drawing and specification confirmation.
Quick View
Linear Halbach Array Selection Snapshot
One-Sided
Field Enhancement
Strengthens the working-side magnetic field while reducing leakage on the back side.
Custom Pitch
Pole Pitch Control
Pole pitch, segment count and magnet size are matched to motor, levitation or sensor design.
Field Map
Magnetic Verification
Surface Gauss and working-gap field mapping can be provided for precision applications.
10-20 Days
Prototype Lead Time
Fast sampling after layout, magnet grade, carrier and testing method are confirmed.
Array Design Focus
Leakage Reduction
One side
Assembly Accuracy
Fixture
1Layout ReviewPitch, pattern, working gap
2Grade MatchBr, Hcj, temperature
3Carrier PlanBase, holes, cover
4Array AssemblyPolarity, bonding, spacing
5Field CheckGauss, mapping, report
Key Applications
Linear Motors
High-flux magnet tracks for linear motors, direct-drive stages, actuators and precision motion systems.
Magnetic Levitation
One-sided enhanced magnetic fields for magnetic levitation tracks, demonstration systems and low-friction guideways.
Linear Generators
Customized Halbach magnet rows for wave energy, vibration energy harvesting and reciprocating generator systems.
Magnetic Bearings
High-gradient magnetic arrays for passive bearing tests, magnetic suspension and special support structures.
Sensors & Encoders
Controlled magnetic field arrays for position sensing, magnetic scales, encoders and test fixtures.
Research & Prototyping
Custom arrays for laboratory experiments, magnetic field studies, university projects and special engineering prototypes.
Typical Array Specifications
The following options are commonly used for custom linear Halbach arrays. Final specifications are confirmed according to required flux density, working gap, pole pitch, array length, temperature and installation method.
|
Item |
Available Options |
Engineering Notes |
|
Array Type |
2-segment, 3-segment, 4-segment, 5-segment or custom Halbach pattern |
More segments can improve field shaping but increase magnetization and assembly complexity. |
|
Magnet Material |
NdFeB, SmCo, ferrite |
NdFeB offers high field strength; SmCo suits high temperature; ferrite is economical for larger low-cost arrays. |
|
Magnet Shape |
Block, rectangular bar, square magnet, custom profile |
Shape is selected according to pole pitch, field target, installation space and assembly fixture. |
|
Magnetization |
Axial, transverse, lengthwise, custom vector direction |
Accurate magnetization direction is essential for proper Halbach field enhancement. |
|
Carrier Material |
Aluminum, stainless steel, carbon steel, engineering plastic, epoxy carrier |
Carrier affects strength, weight, corrosion resistance and magnetic circuit behavior. |
|
Surface Protection |
NiCuNi, epoxy, Zn, parylene, passivation, potting resin |
Protection is selected according to humidity, handling, chemical exposure and temperature. |
|
Inspection |
Dimension, polarity, surface Gauss, field mapping, adhesive coverage, appearance |
Magnetic field mapping is recommended for arrays with strict field uniformity requirements. |
Magnet Material & Grade Selection
|
Material |
Common Grade Range |
Temperature Capability |
Best Used For |
|
NdFeB |
N35-N52, M/H/SH/UH/EH series |
Approx. 80-200 °C depending on grade |
Compact Halbach arrays requiring high surface flux density and strong one-sided magnetic field. |
|
SmCo |
SmCo5, Sm2Co17 series |
Approx. 250-350 °C depending on grade |
High-temperature, vacuum, aerospace, scientific and harsh-environment Halbach arrays. |
|
Ferrite |
Y30, Y30BH, Y35, C5, C8 |
Approx. 200-250 °C depending on grade |
Cost-sensitive, large-size and education or demonstration Halbach arrays. |
Selection note: Linear Halbach array performance should be confirmed together with working gap, required flux density, pole pitch, magnetization direction, temperature and assembly tolerance. Vanguard can recommend magnet grade and layout after reviewing your drawing or target magnetic field.
Available Assembly Configurations
Standard Linear Array
Magnets are arranged in a straight Halbach sequence to enhance the magnetic field on one working side.
Magnet Track Assembly
Magnet rows are bonded into aluminum, steel or stainless carriers for linear motors and motion systems.
Encapsulated Array
Magnets can be sealed by epoxy, stainless cover, plastic housing or potting resin for protection and safety.
High-Uniformity Array
Magnet tolerance, spacing and field mapping are controlled for applications requiring consistent flux distribution.
Custom Pole Pitch
Pole pitch, segment quantity, magnet size and array length can be customized according to motor or sensor design.
Prototype Array Kit
Small-batch arrays with polarity marking, magnetic report and packaging by set for testing and validation.
Design Points for Linear Halbach Arrays
Linear Halbach arrays require careful control of magnetization direction, pole pitch, magnet spacing and assembly accuracy. During design review, Vanguard focuses on required field strength, working gap, magnet grade, segment pattern, carrier material, adhesive strength, coating and operating temperature.
For linear motors and precision motion systems, field uniformity is especially important. Magnet tolerance, pole position, surface flatness and magnetic field mapping should be reviewed together with the stator or coil design.
Field Enhancement
Magnet layout is designed to strengthen the working side field and reduce leakage flux on the back side.
Magnetization Direction
Each magnet must follow the designed vector direction for proper Halbach performance.
Pole Pitch Control
Pole pitch, spacing and segment size are matched to motor, sensor or levitation requirements.
Assembly Accuracy
Positioning fixture, adhesive coverage, flatness and field mapping help ensure consistent magnetic output.
Manufacturing & Quality Assurance
Our linear Halbach array process includes incoming magnet inspection, carrier inspection, polarity and magnetization direction verification, fixture positioning, adhesive dispensing, magnet placement, curing, dimensional inspection, surface Gauss testing, optional field mapping and final packaging.
|
Process Step |
Control Target |
Typical Inspection Method |
|
Magnet Inspection |
Grade, size, coating, polarity and magnetization direction |
Gauss meter, flux meter, polarity checker, caliper and visual inspection. |
|
Carrier Check |
Length, flatness, hole position, surface condition and coating |
CMM, height gauge, caliper, visual check and drawing-based dimensional inspection. |
|
Bonding & Assembly |
Magnet sequence, spacing, adhesive coverage and curing control |
Assembly fixture, process record, visual check and sample strength validation. |
|
Magnetic Verification |
Surface field, polarity sequence, working side strength and leakage side reduction |
Surface Gauss test, polarity check, flux test and magnetic field mapping when required. |
|
Final Array Check |
Appearance, marking, dimensions, packaging and set consistency |
Visual inspection, dimensional report, magnetic report and packing checklist. |
Available Custom Features
Custom Array Length
Array length, width, thickness, carrier hole position and mounting features can be produced according to drawings.
Custom Pole Pitch
Pole pitch, segment count, magnet size and field direction can be matched to your motor or sensor design.
Field Mapping
Surface Gauss, working-gap field scan and magnetic consistency report can be provided for precision applications.
Surface Protection
Nickel, epoxy, zinc, parylene, stainless cover, plastic shell or potting options are available.
Polarity Marking
N/S marking, arrow marking, color marking and assembly orientation labels can be provided.
Inspection Report
Dimensional report, magnetic report, field mapping report and batch traceability documents are available.
Information Needed for Fast Quotation
To quote a linear Halbach array quickly, please provide array drawing, total length, width, thickness, pole pitch, magnet size, magnet material, magnetization direction, required surface Gauss or working-gap field, carrier material, coating requirement, annual quantity and testing standard.
If the design is still under development, you may share the application, working gap, target magnetic field, available installation space, operating temperature and whether leakage field must be reduced. Our engineering team can help recommend a practical Halbach layout.
Frequently Asked Questions
What is the advantage of a linear Halbach array?
It concentrates the magnetic field on one side of the array while reducing leakage field on the opposite side, improving magnetic efficiency for linear motors, sensors and levitation systems.
Can you customize the pole pitch and array length?
Yes. Pole pitch, magnet size, segment number, total length, carrier design and mounting holes can be customized according to drawings.
Which magnet material is best for Halbach arrays?
NdFeB is most common for high magnetic strength. SmCo is recommended for high-temperature or harsh environments. Ferrite can be used for cost-sensitive or educational arrays.
Can you provide field mapping data?
Yes. Surface Gauss testing, working-gap field scan, polarity sequence check and magnetic consistency reports can be provided according to project requirements.
Is assembly difficult for Halbach arrays?
Yes. Magnet direction and attraction forces make assembly more complex than a normal magnet row. We use fixtures, polarity checks and controlled bonding to improve accuracy and consistency.
What is the lead time for custom linear Halbach arrays?
Prototype lead time is usually 10-20 working days after drawing confirmation. Mass-production lead time is typically 25-45 working days depending on size, magnet grade, fixture, coating and testing requirements.
