An object of the present invention is to provide a torque sensor capable of detecting a torque even when an abnormality has occurred in one magnetic sensor among a plurality of magnetic sensors, and an electric power steering apparatus using the torque sensor. The torque sensor includes a first magnetic sensor provided between a first magnetic collection mechanism and the second magnetic collection mechanism, a second magnetic sensor provided between the first magnetic collection mechanism and the second magnetic collection mechanism and disposed at a same position as or a symmetric position to a magnetic environment of the first magnetic sensor, and a third magnetic sensor provided between the first magnetic collection mechanism and the second magnetic collection mechanism and disposed at a same position as or a symmetric position to the magnetic environment of the first magnetic sensor and a magnetic environment of the second magnetic sensor. The torque sensor detects a torque generated on a rotational member based on an output signal of the first magnetic sensor, the second magnetic sensor, or the third magnetic sensor.
TORQUE SENSOR AND ELECTRIC POWER STEERING APPARATUS
28.06.2018
Patent
Elektronische Ressource
Englisch
Magnetostrictive torque sensor and electric power steering apparatus
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