Patent ID: 9024628
Filing Date: 2015-05-05
Classification: B62D,G01R

Abstract:
1. A steering system comprising: a steering shaft that rotates due to an operation of a steering component; an electric motor that assists the operation of the steering component by applying, to the steering shaft, a force that rotates the steering shaft; a permanent magnet that rotates together with the steering shaft; a yoke disposed in a magnetic field formed by the permanent magnet such that a relative position of the yoke with respect to the permanent magnet varies; a magnetic detection device including a magnetic detection portion that generates a first detection signal according to a magnetic flux of a magnetic circuit formed by the permanent magnet and the yoke; an output signal generation portion that generates, based on the first detection signal and an external magnetic field including earth's magnetism, an output signal by reducing an influence of the external magnetic field in a first detection signal; and a motor driving portion that drives the electric motor based on the output signal.