Permanent-magnet magnetic field generator
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United States of America Patent
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Sep 3, 2013
Grant Date -
Sep 2, 2010
app pub date -
Mar 2, 2010
filing date -
Mar 2, 2009
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Abstract
A high-performance variable-magnetic-field dipole-ring magnetic circuit is provided. Specifically, provided is a permanent-magnet magnetic field generator having inner and outer dipole rings which share a central axis, and a yoke which surrounds the dipole rings, wherein a unidirectional variable magnetic field is generated in a space within the inner dipole ring. The generator has a fastener for fixing the inner dipole ring, and a rotator for allowing the outer dipole ring to rotate around the central axis. In the generator, each of the inner and outer dipole rings has a plurality of permanent magnets arranged in such a ring shape that a magnetization direction of the permanent magnets can make a full rotation per half circle of the ring.
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