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Flux Focusing
- Thread starter sreid
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Unfortunately, they don't work that way. Tapering magnets can help shape a magnetic field (e.g. to improve uniformity), but because of the reduced magnet volume the output is reduced.
Tapering the pole pieces works because the flux is concentrated by a high permeability material. Most permanent magnets work at permeabilities close to 1.
The best way to increase the flux in the air gap of a dipole is a Halbach array or closed-loop permanent magnet configuration assembly as suggested by gphatch in an earlier thread (thread340-122602). Note, these ways are more expensive and are more difficult to assemble. You have to calculate if those trade-offs are worth it.
Tapering the pole pieces works because the flux is concentrated by a high permeability material. Most permanent magnets work at permeabilities close to 1.
The best way to increase the flux in the air gap of a dipole is a Halbach array or closed-loop permanent magnet configuration assembly as suggested by gphatch in an earlier thread (thread340-122602). Note, these ways are more expensive and are more difficult to assemble. You have to calculate if those trade-offs are worth it.
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