RELATIVE ROTATIONAL ANGULAR DISPLACEMENT DETECTION DEVICE, TORQUE DETECTION DEVICE, TORQUE CONTROL DEVICE, AND VEHICLE
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United States of America Patent
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app pub date -
Jan 27, 2015
filing date -
Sep 14, 2012
priority date (Note) -
Abandoned
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Abstract
A permanent magnet includes magnetic poles that are arranged so as to alternate in polarity in the circumferential direction of the axis of rotation. The magnet is attached to one of a pair of rotatable members. The rotatable members are relatively rotatable about an axis of rotation. A magnetic flux guiding ring, including an annular ring body and a plurality of protruding portions protruding from the ring body, is attached to the other rotatable member. A plurality of magnetic sensors is arranged adjacent to the ring body. A first facing portion and a second facing portion, each for guide part of magnetic fluxes of the ring body, are provided and do not rotate with the permanent magnet and the magnetic flux guiding ring.
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