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    • 4. 发明公开
    • Position transducer
    • Positionsmessvorrichtung。
    • EP0132813A1
    • 1985-02-13
    • EP84108646.5
    • 1984-07-21
    • Allen-Bradley Company
    • Cannon, Lee E.Schmitt, Peter C.Cheever, Daniel R.
    • G05B19/40G01D5/20
    • G05B19/40G05B2219/35436
    • The position transducer employs a stepping motor as a rotary position sensor by applying a bias current (via resistor 37) to one pair (35,36) of its windings and sensing the signals produced by another pair of windings (38, 39). The bias current flowing through said one pair of windings (35, 36) produces a magnetic detent which defines the increments of rotation. The phase relationship of the signals produced by the other two windings (38,39) indicates direction of rotation. A detector circuit (40 to 60) connected to the other two windings (38,39) produces an output signal indicative of the direction of rotation each time the shaft of the stepping motor is rotated one increment.
    • 位置传感器通过向其绕组的一对(35,36)施加偏置电流(通过电阻器37)来感测由另一对绕组(38,39)产生的信号,采用步进电机作为旋转位置传感器。 流过所述一对绕组(35,36)的偏置电流产生限定旋转增量的磁性制动器。 由其他两个绕组(38,39)产生的信号的相位关系表示旋转方向。 连接到另外两个绕组(38,39)的检测器电路(40至60)每当步进电机的轴旋转一个增量时产生指示旋转方向的输出信号。