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An Introduction to the Halbach Array

An Introduction to the Halbach Array
07/09/2020

Halbach Arrays feature in many common-day devices such as brushless DC motors and even the Inductrack Maglev train. The Halbach Array is a specific arrangement of permanent magnets that cancels the magnetic field to nearly zero on one side, but significantly increases the strength of the magnetic field on the opposite side. This magnetic phenomenon is only achieved when there is a spatially rotating pattern of magnetisation. The rotating pattern repeats indefinitely without any alternation in the magnetic properties. The effect is comparable to placing a bank of horseshoe magnets next to each other, with the similar poles touching.

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