Motor-driven power steering apparatus
AssigneeShowa Corporation
InventorsHarunori Imagawa, Yoshitaka Kubo, Akira Fujisaki
Life of this patent
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Abstract
In a motor-driven power steering apparatus, a plurality of rotational position detecting sensors are provided in an electric motor, and during an abnormality in any one rotational sensor, the electric motor can be driven by using a detected result of any other one rotational position detecting sensor.
Claims6
A motor-driven power steering apparatus having a single brushless motor as an electric motor, having plural phases of coil windings wound around a stator core comprising a plurality of exciting phases, arranged to sequentially supply a driving current to the exciting phase of each of the coil windings on the basis of a rotational position of a rotor detected by a rotational position detecting sensor, and being capable of driving the electric motor, when converting rotation of the electric motor into a stroke of a rack shaft by a power transmission mechanism, and when assisting steering of a tire wheel connected to the rack shaft, wherein
- a plurality of rotational position detecting sensors are provided in the single electric motor, and during an abnormality in any one rotational sensor, the electric motor is drivable by using a detected result of any other one rotational position detecting sensor.
Dependencies are inferred from the claim text.