Torque sensor and electric power steering system
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United States of America Patent
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May 15, 2018
Issued Date -
N/A
app pub date -
Jun 8, 2015
filing date -
Jun 18, 2014
priority date (Note) -
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Abstract
A torque sensor includes a pair of magnetic yokes arranged in a magnetic field from a multipolar magnet that rotates integrally with, for example, a first shaft, and the magnetic yokes rotate integrally with, for example, a second shaft. The torque sensor includes magnetic collecting elements magnetically coupled to the respective magnetic yokes and a magnetic flux detecting element. The magnetic collecting elements have a pair of magnetic collecting portions (magnetic collecting protrusions) facing each other. The magnetic flux detecting element includes a circuit board with a cutout formed therein and a Hall IC having a Hall element arranged between the magnetic collecting portions, and the Hall IC is mounted parallel to the circuit board so as to extend over the cutout. At least a part of one of the magnetic collecting portions is arranged in the cutout.
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