Custom Halbach Arrays

A Halbach array rotates the magnetization direction of adjacent permanent magnets to produce constructive interference on one side and destructive cancellation on the other. This concentrates significantly more usable magnetic flux in the working air gap without increasing the total magnet volume — the fundamental advantage that makes Halbach technology indispensable for high-field applications.

Because the non-working side of a Halbach array produces near-zero stray field, the heavy ferromagnetic yoke (back-iron) that conventional magnet assemblies require can be drastically reduced or completely eliminated. In aerospace applications — drones, eVTOL, satellite actuators — this directly increases payload capacity, extends flight endurance, and reduces rotor inertia for faster dynamic response.

A well-designed Halbach arrangement produces an air-gap field distribution that closely approximates a pure sinusoidal waveform. This suppresses low-order harmonics, reduces cogging torque and torque ripple in rotating machines, and minimizes eddy-current and hysteresis losses in the stator core — resulting in higher energy conversion efficiency, lower acoustic noise, and smoother motion control.

The self-shielding property of Halbach arrays eliminates stray magnetic fields that would otherwise interfere with nearby electronics, sensors, and precision instruments. This allows engineers to package magnetic assemblies into tighter envelopes — critical for semiconductor lithography stages, MRI bore magnets, robot end-effectors, and miniaturized voice coil actuators where every millimeter of clearance matters.