PROBLEM TO BE SOLVED: To prevent a detection error of a rotation angle detection part caused by affection of a magnetic field of other element, without adding other component.SOLUTION: A rotation angle sensor 22 is a sensor for detecting a magnetic field acting to an apex 22A in parallel, detects the magnetic field of a sensor magnet 20 rotating in linkage with rotation of an output shaft 18 of a wiper motor, and outputs a signal indicating change of the magnetic field of the sensor magnet which is generated by rotation of the output shaft 18. A choke coil 44 for removing noise from a power source is mounted on a substrate 28 in a manner that the rotation angle sensor 22 does not detect the magnetic field generated during operation.

    【課題】別部品の追加を要さずに、他の素子からの磁界の影響による回転角度検知部の誤検知を防止する。【解決手段】回転角度センサ22は、頂部22Aに平行に作用する磁界を検知するセンサであり、ワイパモータの出力軸18の回転に連動して回転するセンサマグネット20の磁界を検知し、出力軸18の回転によるセンサマグネット20の磁界の変化を示す信号を出力する。また、電源からのノイズを除去するチョークコイル44は、動作時に生じる磁界が回転角度センサ22が検知しないように基板28に実装される。【選択図】図5


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    Title :

    WIPER MOTOR CONTROL DEVICE


    Additional title:

    ワイパモータ制御装置


    Contributors:

    Publication date :

    2015-08-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60S SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR , Warten, Reinigen, Instandsetzen, Unterstützen, Anheben oder Rangieren von Fahrzeugen, soweit nicht anderweitig vorgesehen / G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen



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