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公开(公告)号：US4227072A
公开(公告)日：1980-10-07
申请号：US928246
申请日：1978-07-26
CPC分类号： G05D13/02 , G05B11/01 , Y10S388/912
摘要： In the field of closed loop control systems, a reference signal input is compared with a feedback signal to provide an error signal which then initiates corrective action until the feedback signal duplicates the reference signal. Hence, the reference signal may be appreciated as the set point at which the control system should operate. The disclosure relates to a manual input reference signal circuit which may be used to input a desired reference speed signal into a control system circuit for a prime mover. Provision is made for both local and remote manual signal input and priority logic is included for selecting the most appropriate reference signal. Inhibit logic dictates the floor and ceiling for the range of prime mover operation .
摘要翻译： 在闭环控制系统领域，将参考信号输入与反馈信号进行比较，以提供一个误差信号，然后启动纠正措施，直到反馈信号复制参考信号。 因此，参考信号可以被理解为控制系统应当操作的设定点。 本公开涉及一种手动输入参考信号电路，其可用于将期望的参考速度信号输入到用于原动机的控制系统电路中。 提供本地和远程手动信号输入，包括优先级逻辑，用于选择最合适的参考信号。 抑制逻辑决定了原动机运行范围的地板和天花板。
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公开(公告)号：US4217617A
公开(公告)日：1980-08-12
申请号：US944761
申请日：1978-09-22
CPC分类号： F01D21/20 , G01P3/489 , Y02E10/226
摘要： The disclosure sets forth trip circuitry for a rotating shaft machine which includes redundant overspeed protection and means for testing the overspeed protection circuit while the machine remains in operation. Moreover, further protective circuitry is provided for detecting a failure in the speed sensing system. The overspeed protection and the speed sensing failure circuit are each connected to a relay system which may actuate a trip servo valve to a closed position.
摘要翻译： 本公开提出了一种用于旋转轴机器的跳闸电路，其包括冗余超速保护和用于在机器保持运行时测试超速保护电路的装置。 此外，还提供了用于检测速度感测系统中的故障的进一步的保护电路。 超速保护和速度检测故障电路各自连接到继电器系统，其可以将跳闸伺服阀致动到闭合位置。
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公开(公告)号：US4254344A
公开(公告)日：1981-03-03
申请号：US86705
申请日：1979-10-22
申请人： Thomas A. Fancy , Vesa I. Aunio , John W. Capitao
发明人： Thomas A. Fancy , Vesa I. Aunio , John W. Capitao
CPC分类号： G01P3/48 , Y10T307/615 , Y10T307/729 , Y10T307/793
摘要： A prime mover which is equipped with an electric speed governor may produce adequate electrical power output through a shaft driven permanent magnet alternator to run the electric speed governor. However, initially an auxiliary power source must be connected to the electric governor until the permanent magnet alternator becomes self-sustaining. The present invention is an electrical circuit which will automatically provide start-up power from an auxiliary source and then switch to the permanent magnet alternator. Certain safety interlocks are provided in case of speed pick-up failure.
摘要翻译： 装有电动调速器的原动机可以通过轴驱动的永久磁铁交流发电机产生足够的电力输出，以运行电动调速器。 然而，最初辅助电源必须连接到电动调速器，直到永久磁铁交流发电机变得自我维持为止。 本发明是一种电路，其将自动地从辅助源提供启动电力，然后切换到永久磁铁交流发电机。 在速度提升故障的情况下，提供某些安全联锁。
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公开(公告)号：US4154395A
公开(公告)日：1979-05-15
申请号：US854973
申请日：1977-11-25
申请人： Thomas A. Fancy
发明人： Thomas A. Fancy
CPC分类号： F02D41/0097 , F01D17/06 , F01D17/24 , G01P21/02 , G05B9/03
摘要： The reliability of any system can be enhanced by redundancy. In a turbomachine control system, increased reliability through redundancy is particularly desirable in view of the consequences of an unscheduled shutdown. One area of a turbomachine controls system which is particularly suited to redundant modeling is the speed control circuits. Speed pick-up probes may be subject to severe duty and are critical to the speed control of a turbomachine since they provide the speed feedback signal. The present invention is a solid state circuit which provides an output signal even if either one of two redundant speed feedback probes should fail. This circuit also allows probe replacement while the turbomachine remains in service.
摘要翻译： 可以通过冗余来增强任何系统的可靠性。 在涡轮机控制系统中，考虑到非计划停机的后果，特别需要通过冗余来提高可靠性。 特别适用于冗余建模的涡轮机控制系统的一个领域是速度控制电路。 速度传感器探头可能受到严重的负担，并且对于涡轮机的速度控制至关重要，因为它们提供速度反馈信号。 本发明是即使两个冗余速度反馈探针中的任一个失败也提供输出信号的固态电路。 该电路还允许探头更换，同时涡轮机保持在使用状态。
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