Halbach Array Magnet
Halbach阵列磁铁
A Halbach array is a specific arrangement of permanent magnets that enhances the magnetic field on one side while weakening or even cancelling it on the other. This one-sided field characteristic makes it uniquely useful for applications that require a directional magnetic field — and yields higher field strength and efficiency than a conventional magnet array.
AIC Engineering designs and builds linear, cylindrical, and rotated Halbach arrays in bonded or sintered NdFeB / SmCo. Rotating a cylindrical Halbach array around its axis produces a field that rotates through the bore — the basis of rotating-field dipole magnets and magnetic refrigeration devices.
Each array is FEA-optimised for the target field strength, uniformity, and stray-field behaviour on the null side. Segments are bonded into a mechanical carrier, magnetised in the specified orientation, and field-mapped before delivery — from compact laboratory dipole magnets to multi-tonne accelerator and beamline arrays.
Key Features
One-Sided Field
Field enhanced on the working side, cancelled on the back side — directional field without back-side steel return.
Higher Field Strength
Achieves higher field and efficiency than a conventional magnet array of the same volume.
Linear / Cylindrical
Linear Halbach tracks for motors; cylindrical Halbach for dipole and rotating-field devices.
Bonded or Sintered
Bonded segments for complex geometry; sintered segments for peak field strength.
Array Types
Built to order — send field strength, working side, and geometry. Representative array types below.
| Array Type | Description | Typical Use |
|---|---|---|
| Linear Halbach | Flat array of rotated-polarity segments; field enhanced on one face. | Linear motor magnet tracks, levitation, conveyors. |
| Cylindrical Halbach | Segments around a bore; strong transverse field in the bore. | Dipole magnets, beam steering, MRI-style devices. |
| Rotating Halbach | Cylindrical array rotated about its axis; bore field rotates with it. | Rotating-field sources, magnetic separation, refrigeration. |
| Bonded Segments | Bonded NdFeB segments pressed to complex shapes; multi-pole magnetised. | Complex geometry, cost-effective mid-field arrays. |
| Sintered Segments | Sintered NdFeB / SmCo segments for peak field and temperature stability. | High-field dipoles, accelerator and beamline arrays. |
| Custom Array | Customer-defined field, bore, and carrier — built to print. | OEM device integration, research magnets. |
Configurable Parameters
No fixed catalogue grades — each array is designed to your field specification. Typical ranges below.
| Parameter | Typical Range | Notes |
|---|---|---|
| Bore / Face Field | 0.5 – 2.0 T | Peak field on working side; FEA-verified. |
| Null-Side Field | ≤ 10 % of working field | Confirmed by field mapping. |
| Array Geometry | Linear / cylindrical / custom | Per device mechanical layout. |
| Magnet Material | NdFeB (N42–N52) / SmCo | SmCo for elevated temperature stability. |
| Segment Type | Bonded / sintered | Sintered for peak field; bonded for shape. |
| Field Uniformity | ±1 – 5 % over bore | Tuned by segment count and grading. |
| Operating Temp. | −40 to 200 °C | Material and grade dependent. |
Values are typical design ranges — confirmed field, dimensions, and lead time are provided per quotation after magnetic-circuit review.
Design & Manufacturing
FEA field design first, then carrier machining, segment bonding and orientation, magnetisation, and field mapping.
- Field strength & working-side specification
- FEA segment-orientation optimisation
- Null-side and uniformity check
- Magnet grade and segment count fixed
- Carrier / housing CNC machining
- Segment bonding in specified orientation
- Pulse magnetisation of segments
- Mechanical retention and assembly
- Working-side field-strength mapping
- Null-side stray-field verification
- Bore / face uniformity scan
- Protective packaging
Typical Applications
Need a Custom Halbach Array?
Send your field-strength target, working side, and geometry — our engineers will simulate the array and propose a Halbach design.
Discuss Custom RequirementsFrequently Asked Questions
Answers to common questions about our magnets, customisation, ordering and shipping.
- What is a Halbach array? +
- A Halbach array is an arrangement of permanent magnets that enhances the field on one side while cancelling it on the other — a one-sided directional field with higher strength and efficiency than a conventional array.
- What are Halbach arrays used for? +
- Linear Halbach tracks for linear motors and levitation; cylindrical Halbach for dipole magnets, beam steering, and MRI-style devices; rotating Halbach for rotating-field sources and magnetic refrigeration.
- What field strength can a Halbach array reach? +
- Bore/face field typically 0.5–2.0 T with null-side field ≤10% of the working field, field uniformity ±1–5% over the bore, in bonded or sintered NdFeB/SmCo.