公开(公告)号：US3893014A

公开(公告)日：1975-07-01

申请号：US47124974

申请日：1974-05-20

Applicant: INT STANDARD ELECTRIC CORP

Inventor： VACEK JAN

IPC: G01P3/46 ,  H02M1/12

CPC classification number: G01P3/46 ,  Y10T307/582 ,  Y10T307/68 ,  Y10T307/718

Abstract: A first tachometer generator or other alternator having at least two phases and at least two poles, wherein the output of the first tachometer generator is full wave rectified. A second tachometer generator is also provided having one phase and at least four poles. The output of the second tachometer generator is full wave rectified to provide a periodic wave to match to the fundamental ripple frequency at the output of the first tachometer generator rectifiers and/or to eliminate the fundamental. An outstanding feature of the disclosure is that ripple elimination is achieved independent of generator speed. This is especially desirable in a vast number of controls including, but not limited to, speed controls for electric or other motors. The reason that this is desirable is that the ripple fundamental can be a very low frequency at low speeds and cannot be easily or inexpensively removed by filters. If not removed, the ripple can have a serious adverse effect upon the dynamic response and accuracy of the system in which a tachometer generator is used.

Abstract translation: 具有至少两相和至少两极的第一转速发生器或其它交流发电机，其中第一转速计发生器的输出是全波整流的。 还提供了具有一相和至少四极的第二转速计发生器。 第二转速表发生器的输出全波整流，以提供周期波，以匹配第一转速计发生器整流器的输出端的基波纹频率和/或消除基波。 公开的突出特征是独立于发电机速度实现波纹消除。 这在大量控制中是特别需要的，包括但不限于用于电动或其他电动机的速度控制。 这是理想的原因是纹波基波在低速下可以是非常低的频率，并且不能通过滤波器容易或廉价地去除。 如果不去除，纹波可能对使用转速计发生器的系统的动态响应和精度产生严重的不利影响。