Sinusoidal signals (S1, S2) having a phase difference of 120° are output from two magnetic sensors in accordance with rotation of an input shaft. A first rotation angle computation unit computes a rotation angle θ(n) on the basis of output signals S1(n), S1(n−1), S2(n), S2(n−1) from the magnetic sensors, which are sampled at two sampling timings. At this time, the first rotation angle computation unit computes the rotation angle θ(n) on the assumption that there are no variations of amplitudes of the output signals (S1, S2) from each one of the two sensors due to temperature changes between the two sampling timings.


    Access

    Download


    Export, share and cite



    Title :

    Rotation angle detection device and electric power steering system including the same


    Contributors:

    Publication date :

    2016-12-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01C Messen von Entfernungen, Höhen, Neigungen oder Richtungen , MEASURING DISTANCES, LEVELS OR BEARINGS / B62D MOTOR VEHICLES , Motorfahrzeuge / G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein





    Rotation angle detection device and electric power steering system including the same

    TAKAKI TAKESHI / KARIATSUMARI YUJI / SHIMIZU YOSHINOBU | European Patent Office | 2017

    Free access


    ROTATION ANGLE DETECTION DEVICE AND ELECTRIC POWER STEERING DEVICE

    KOBAYASHI TAKAYUKI / SUZUKI DAI / KUMAGAI SHIN et al. | European Patent Office | 2022

    Free access