To provide a motor device and an electrically-driven caster that can improve detection precision of a rotation detection unit.SOLUTION: A motor device 50 comprises a brushless motor 43 and a rotation detection unit 80 which detects a rotational position of a rotor 44 of the brushless motor 43. The brushless motor 43 includes a stator 46 wound with a coil 59 to be supplied with electric power, and a flywheel 64 in a bottomed-cylinder shape covering the stator 46 from one axial side and provided rotatably with respect to the stator 46. The rotation detection unit 80 includes a sensor unit 82 which detects rotation of the flywheel 64 and outputs the detection result in the form of a signal, and a control unit which determines a rotational position of the rotor 44 based upon the detection result of the sensor unit 82. The sensor unit 82 has a second cover 76 which is arranged radially facing a wheel opening end part 64c of the flywheel 64, and covers the wheel opening end part 64c of the flywheel 64 from radially outside the sensor unit 82.SELECTED DRAWING: Figure 2

    【課題】回転検出部の検出精度を向上できるモータ装置及び電動キャスタを提供する。【解決手段】本発明のモータ装置50は、ブラシレスモータ43と、ブラシレスモータ43におけるロータ44の回転位置を検出する回転検出部80と、を備え、ブラシレスモータ43は、給電が行われるコイル59が巻回されたステータ46と、ステータ46を軸方向一方から覆い、ステータ46に対して回転自在に設けられた有底筒状のフライホイール64と、を備え、回転検出部80は、フライホイール64の回転を検出し、検出結果を信号として出力するセンサ部82と、センサ部82の検出結果に基づいて、ロータ44の回転位置を判断する制御部と、を備え、センサ部82は、フライホイール64のホイール開口端部64cに径方向で対向する位置に配置されており、フライホイール64のホイール開口端部64cをセンサ部82の径方向外側から覆う第2カバー76を備える。【選択図】図2


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    Title :

    MOTOR DEVICE AND ELECTRICALLY-DRIVEN CASTER


    Additional title:

    モータ装置及び電動キャスタ


    Contributors:

    Publication date :

    2023-02-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H02K Dynamoelektrische Maschinen , DYNAMO-ELECTRIC MACHINES / B62D MOTOR VEHICLES , Motorfahrzeuge



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