According to one embodiment, an electric actuator includes an output shaft, a motor, a speed reducer, a rotation sensor, a current sensor, and a control unit. A valley portion is provided on an outer peripheral edge of a stopper plate connected to an output shaft, and a contact portion in contact with the outer peripheral edge is pressed against the outer peripheral edge at a contact position. The valley portion has a bottom portion, and a first inclined surface and a second inclined surface continuous from the bottom portion. The control unit performs: a first acquisition step for acquiring, as a first rotation angle, a measurement angle of the rotation sensor when the current value exceeds a first threshold value when the motor is driven and the contact position passes through the first inclined surface; a second acquisition step of acquiring, as a second rotation angle, a measurement angle of the rotation sensor when the current value exceeds a second threshold value when the motor is driven and the contact position passes through the second inclined surface; and a calculation step for storing a rotation angle between the first rotation angle and the second rotation angle as a bottom position rotation angle in a state where the contact position is located at the bottom.

    本发明的电动致动器的一个方式具备输出轴、马达、减速器、旋转传感器、电流传感器及控制部。在与输出轴连接的止动板的外周缘上设有谷部,与外周缘接触的接触部在接触位置处被按压于外周缘。所述谷部具有底部、从所述底部连续的第一倾斜面和第二倾斜面。控制部进行如下工序:第一取得工序,在驱动马达并且接触位置经过第一倾斜面时,取得电流值超过第一阈值时的旋转传感器的测定角度作为第一旋转角度;第二取得工序,在驱动马达并且接触位置经过第二倾斜面时,取得电流值超过第二阈值时的旋转传感器的测定角度作为第二旋转角度;以及运算工序,将第一旋转角度与第二旋转角度之间的旋转角度作为接触位置位于底部的状态下的底位置旋转角度进行存储。


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    Title :

    Electric actuator


    Additional title:

    电动致动器


    Contributors:

    Publication date :

    2024-10-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    H02K Dynamoelektrische Maschinen , DYNAMO-ELECTRIC MACHINES / F16H Getriebe , GEARING / B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern



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