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Torque in permanent magnet couplings: Comparison of uniform and radial magnetization
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10.1063/1.3074108
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Affiliations:
1 Laboratoire d’Acoustique de l’Universite du Maine, UMR CNRS 6613, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
a) Author to whom correspondence should be addressed. Electronic mail: guy.lemarquand@ieee.org.
J. Appl. Phys. 105, 053904 (2009)
/content/aip/journal/jap/105/5/10.1063/1.3074108
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/5/10.1063/1.3074108

Figures

FIG. 1.

Representation of the geometry considered in three dimensions: two tile permanent magnets uniformly magnetized.

FIG. 2.

Representation of the geometry considered in two dimensions: two tile permanent magnets uniformly magnetized.

FIG. 3.

Representation of the torque transmitted between two tiles; thick line: the magnetization is uniform, dashed lines: the magnetization is radial; , , , , , , , , , and .

FIG. 4.

Representation of the torque transmitted between two tiles; thick line: the magnetization is uniform, dashed lines: the magnetization is radial; , , , , , , , , , and .

FIG. 5.

Representation of the torque transmitted between two tiles; thick line: the magnetization is uniform, dashed lines: the magnetization is radial; , , , , , , , , , and .

FIG. 6.

Representation of the torque transmitted between two tiles; thick line: the magnetization is uniform, dashed lines: the magnetization is radial; , , , , , , , , , and .

FIG. 7.

Representation of the mean loss of efficiency of the torque transmitted between two tiles uniformly magnetized versus the angular width of the tiles. This loss of torque is calculated in comparison with the torque transmitted between two tiles radially magnetized. The points correspond to Figs. 3–6. We have , , , , , and .

FIG. 8.

Representation of the total torque transmitted between an eight tile rotor and an eight tile stator vs the angle . The tiles are either radially magnetized (dashed line) or uniformly magnetized (thick line) , , , , , and .

Tables

Table I.

Definition of the magnetic pole surface densities located on the magnets.

/content/aip/journal/jap/105/5/10.1063/1.3074108
2009-03-05
2014-04-24

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