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公开(公告)号:US4364001A
公开(公告)日:1982-12-14
申请号:US187548
申请日:1980-09-16
申请人: Alfred Heidt , Erich Link , Wolfgang Ortlieb
发明人: Alfred Heidt , Erich Link , Wolfgang Ortlieb
摘要: An arrangement for energy economy in a drive which includes an induction motor and a clutch-brake unit, particularly for sewing machines is provided. The windings of the induction motor are dimensioned so that the motor speed remains virtually constant in a stable speed range under normal service conditions, and in which the clutch-brake unit serves to control the drive output speed, so that the motor operates in an alternation of load phases and no-load phases. Switches are included in the current paths of the windings, which reduce the current through the windings to a prescribable degree. A modulation circuit to control the acceleration of the motor speed and its persistence in the stable speed range during load variations is associated with the switches. The modulation circuit contains a delay element, which is triggered when the mains voltage is applied, and an impulse prolongation element having a time constant dimensioned so that the motor remains in the stable speed range under all service conditions.
摘要翻译: 提供了一种包括异步电动机和离合器制动单元的驱动装置,特别是用于缝纫机的节能装置。 感应电动机的绕组的尺寸设计使得电机速度在正常使用条件下在稳定的速度范围内几乎保持不变,并且其中离合器 - 制动单元用于控制驱动输出速度,使得电动机以交替方式工作 的负载阶段和空载阶段。 开关包括在绕组的电流路径中,这将绕过的电流减小到可规定的程度。 用于控制电动机速度加速度的调制电路及其在负载变化期间在稳定速度范围内的持续性与开关相关联。 调制电路包含延时元件,其在施加电源电压时被触发,并且具有时间常数的脉冲延长元件的大小被确定为使电机在所有的工作条件下保持在稳定的速度范围内。
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公开(公告)号:US4139831A
公开(公告)日:1979-02-13
申请号:US846990
申请日:1977-10-31
摘要: An apparatus for the control of variable speed electrical positioning drives, especially for sewing machine positioning drives, is disclosed in two exemplary embodiments. The apparatus provides a preset nominal value of speed and a range of adjustment for additional signals in digital form, thus making possible a continuous or incremental change in the nominal value as well as additional digital signals. The apparatus includes lamellar contact elements of a potentiometer arranged on a base element in the path of a slider for the nominal value of speed and at least one low resistance lamellar contact element arranged in the slider path for producing an additional digital signal.
摘要翻译: 在两个示例性实施例中公开了一种用于控制变速电气定位驱动装置,特别是缝纫机定位驱动装置。 该装置为数字形式的附加信号提供速度的预设标称值和调整范围,从而使标称值的连续或增量变化以及附加数字信号成为可能。 该装置包括布置在用于标称速度的滑块的路径中的基本元件上的电位器的层状接触元件和布置在滑块路径中的用于产生附加数字信号的至少一个低电阻片层接触元件。
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