Rotation detection device and method of manufacturing rotation detection device
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United States of America Patent
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Jan 16, 2018
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N/A
app pub date -
Apr 23, 2015
filing date -
Apr 23, 2015
priority date (Note) -
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Abstract
A magnet for detection mounted on a rotating shaft rotating about a rotation axis, and a detector disposed opposite to the magnet for detection to detect rotation of the rotating shaft are included. The detector includes a multi-layer circuit board, a recessed groove that is provided in an interlayer of the circuit board, has a center on an extension of the rotation axis, and is orthogonal to the rotation axis, a combined magnetic wire incorporated in the recessed groove and exhibiting a large Barkhausen effect, and a pickup coil formed of wiring conductors on the circuit board and a conductor with which through holes are filled, to surround the combined magnetic wire.
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