Interface & Assembly Envelope
Provide the mounting interface, available space and nearby components with the required field specification.
Review an array applicationHalbach Magnet Arrays
The Halbach geometry concentrates flux on the working face and suppresses the back field. Array geometry can increase the field in the specified working region. Review the stated gain with the comparison geometry, gap and agreed validation method., with complete assembly, positioning and magnetic verification support.
Product Range
Halbach Arrays — Product Gallery
Product forms, uses and selection considerations. Final specifications are agreed for each project.
Circular Array
Circular arrangement with defined orientation and support.
Linear Array
Linear sequence for the specified working-side field.
Cylindrical Segments
Segment geometry shapes the intended field region.
Retained Array
Retention and working gap reviewed with orientation.
Connect Field Requirements to Geometry
Define a segment sequence and magnetization direction for the required working region. A circular bore and a linear working face need different field specifications.
State working distance, mapped volume and retention interfaces. Review the fixture and assembly sequence alongside the agreed field-map acceptance criteria.
Review array configurations- Working distance, field uniformity and target field map
- Segment orientation, gaps and positioning datums
- Field-map method, temperature and retention requirements
SELECTION GUIDEApplication selection notesExplore applications and requirements
Why Halbach?
A single magnet has flux on both faces. Rotate successive magnets by 90° and the flux constructively interferes on one side while destructively canceling on the other.
- ✓Concentrated field strength — 2× field capability versus a conventional array
- ✓Reduced back-side field — a yoke-free design may be possible; finite arrays retain stray fields that must be checked around nearby electronics
- ✓Sinusoidal field — segmentation, working gap and end effects shape the harmonics; evaluate the required field profile for motors or maglev
- ✓Custom geometries — linear, cylindrical (rotating), and 4-sided configurations designed to your spec
Applications
| Application | Typical Spec | Why This Material |
|---|---|---|
| Brushless DC Motors | Cylindrical Halbach rotor | Back-EMF shaping; cogging also depends on the stator and complete motor design |
| Magnetic Levitation | Linear Halbach track | Strong one-sided lift force for maglev systems |
| Particle Accelerators | Hybrid Halbach (NdFeB + SmCo) | Precision field shaping for beam control |
| MRI & NMR | Cylindrical Halbach | Compact, open MRI designs without superconducting magnets |
| Magnetic Refrigeration | Rotating Halbach | Field switching for magnetocaloric cooling |
Halbach Array Configurations
We design the array to your field spec.
| Configuration | Geometry | Field Gain | Typical Use | Notes |
|---|---|---|---|---|
| Linear Halbach | Straight row, 90° rotation | 1.4× vs flat array | Maglev tracks, separators | Simple assembly, modular |
| Cylindrical Halbach | Ring, continuous k=1 rotation | 2× vs uniform ring | Motor rotors, MRI | Highest center field |
| Dipole (2-sided) | Rectangular yoke-free | High uniformity | Accelerators, sensors | Uniform field region |
| 4-Sided Halbach | Square cross-section | Very high center field | Analytical instruments | Compact flux concentrator |
Design Support
We provide complete Halbach design services:
- ✓FEA simulation — we model your array in 2D/3D FEA software and iterate the geometry to hit your field target
- ✓Segment optimization — we balance segment count (more segments = better field but higher cost) against your budget
- ✓Grade selection — NdFeB N42–N54 for maximum field; SmCo for high-temperature; bonded for complex shapes
Housing & Retention
Halbach arrays are challenging to assemble — magnetic forces can rotate or displace segments during assembly. Fixtures and retention must control the assembly sequence:
- Non-magnetic housings — aluminum, G10 or PEEK, with alignment fixtures matched to your array.
- ✓Mechanical retention — for high-vibration applications: machined pockets with adhesive and mechanical interlock
- ✓Segment marking — segment-direction markings support traceability; assembly and service still require an approved orientation map and safe handling instructions
Process reference images are separated from the product gallery. They illustrate equipment and handling topics; they do not establish ownership of a facility, a customer delivery, or project-specific inspection results.
Factory Tour
Inside Halbach Arrays Manufacturing
Halbach arrays depend on accurate component geometry, safe fixture-controlled assembly, pole-orientation control and mapped field performance.
4 process viewsProduct-specific manufacturing
1 inspection viewRelevant quality equipment
1 assembly referenceSegment-direction markings
Process and assembly referencesManufacturing equipment · inspection equipment · orientation reference
Manufacturing & assemblyInspection & testing
Segment Machining
Machining equipment controls arc, wedge and interface geometry.
Automated Magnetic Assembly Cell
Robotic fixtures manage orientation, placement and integrated magnetic checks.
3D Magnetic Field Mapping
A motorized Hall-probe scanner maps field strength and distribution across the Halbach working surface.
Segment Orientation Reference
Pole directions and segment order follow the approved assembly drawing. Transport restraints and protective packing are specified separately.
Manufacturing and inspection equipment images with an assembly-orientation reference.Equipment route varies by material and geometryRemote video inspection available before shipment
Frequently Asked Questions
How many segments do I need?
More segments create a better approximation of the ideal continuous Halbach. A 4-segment sequence is a coarse approximation; 8–16 segments is a common design starting point. Select the count using the required field region, harmonic content, working gap, assembly constraints and cost; the benefit is geometry-dependent.
Can a Halbach array hold itself together?
No — the same forces that create the one-sided field try to rotate and eject the segments. Every Halbach needs a housing, adhesive, and/or mechanical retention. We design retention based on your vibration and shock requirements.
Do you offer simulation before manufacturing?
Yes — send your target field strength, geometry envelope, and uniformity requirements. We'll simulate your array, propose a segment design, and provide field plots for your review before cutting any material.
What tolerances matter most in a Halbach?
Segment orientation, position and gaps all influence field quality. The published ±1° angular and ±0.05mm positioning references should be tied to drawing datums and an agreed field-map acceptance plan; their relative importance depends on the geometry.
Array Assembly & Validation
Segmentation & Bonding
Segments bonded in precision fixtures with structural adhesive; bond lines and gap tolerances controlled to hold the calculated field profile.
Flux Mapping
Hall-probe scanning of the assembled array against FEA prediction — working-region field strength, uniformity and residual back-side field checked against the agreed acceptance limits.
Encapsulation
Potting or banding for mechanical and environmental protection; arrays can be integrated onto shafts, back-irons or customer structures.
Have an Assembly Drawing or BOM?
Send it to our team — we'll review the design and quote it as a validated, ready-to-install assembly.