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1. 发明授权

US4000446A Overload protection system for three-phase submersible pump motor 失效
标题翻译：三相潜水泵电机过载保护系统
公开(公告)号：US4000446A
公开(公告)日：1976-12-28
申请号：US583717
申请日：1975-06-04
申请人： Joseph E. Vandevier , David R. Ellis-Anwyl
发明人： Joseph E. Vandevier , David R. Ellis-Anwyl
IPC分类号： H02H3/093 , H02H7/085 , H01H47/18
CPC分类号： H02H7/085 , H02H3/0935
摘要： Overload protection of a three-phase submersible pump motor, such as the type used downhole in an oil well, is obtained with a solid state digital logic control system that monitors each of the three phase currents and shuts the pump motor down if any of those phase currents indicates an overload condition. A time delay is introduced before shutdown to avoid undesired nuisance shutdowns otherwise caused by transient or momentary conditions. The shutdown time delay is variable and is inversely proportional to the amount of overload in order that greater overloads result in faster shutdowns.
摘要翻译：使用固态数字逻辑控制系统获得三相潜水泵电机的过载保护，例如在油井中使用的井下型号，其中监控三相电流中的每一个，并将泵电机向下关闭，如果有的话相电流表示过载状态。在关机之前引入时间延迟，以避免由短暂或瞬时条件引起的不必要的烦扰关闭。关机时间延迟是可变的，并且与过载量成反比，以便更大的过载导致更快的关机。

2. 发明授权

US3976919A Phase sequence detector for three-phase AC power system 失效
标题翻译：三相交流电源系统的相序检测器
公开(公告)号：US3976919A
公开(公告)日：1976-08-24
申请号：US583719
申请日：1975-06-04
申请人： Joseph E. Vandevier , David R. Ellis-Anwyl
发明人： Joseph E. Vandevier , David R. Ellis-Anwyl
IPC分类号： G01R29/18 , H02H7/097 , H02H11/00 , H02H3/26
CPC分类号： G01R29/18 , H02H11/004 , H02H7/097
摘要： The phase sequence of the phase currents supplied by a three-phase AC power supply to a phase-sensitive load (such as a three-phase AC motor) is monitored by developing three phase-displaced, rectangular shaped logic signals, respectively representing the three phase currents, and applying these logic signals to respective ones of the J, C and K inputs of a J-K flip-flop. When the load is correctly connected to the power supply, the phase relationship of the three logic signals will be appropriate to trigger the flip-flop to its set operating state. Any other sequence actuates the flip-flop to its reset state which, in turn, disconnects the load from the power supply.
摘要翻译：三相交流电源向相敏负载（如三相交流电动机）提供的相电流的相位序列通过开发三个相位偏移的矩形逻辑信号来监测，分别代表三相相电流，并将这些逻辑信号施加到JK触发器的J，C和K输入中的相应的一个。当负载正确连接到电源时，三个逻辑信号的相位关系将适合触发触发器到其设置的工作状态。任何其他顺序将触发器驱动到其复位状态，这又使负载与电源断开。

3. 发明授权

US4021700A Digital logic control system for three-phase submersible pump motor 失效
标题翻译：三相潜水泵电机数字逻辑控制系统
公开(公告)号：US4021700A
公开(公告)日：1977-05-03
申请号：US583718
申请日：1975-06-04
申请人： David R. Ellis-Anwyl
发明人： David R. Ellis-Anwyl
IPC分类号： H02H3/13 , H02H7/08 , H02H7/09
CPC分类号： H02H7/09 , H02H3/13 , H02H7/0827
摘要： Complete protection of a three-phase submersible pump motor, such as the type used downhole in an oil well, is obtained with a solid state digital logic control system that monitors each of the three phase currents and shuts the pump motor down if any of those phase currents indicates either an underload or overload condition. Time delays are introduced before shutdown to avoid undesired nuisance shutdowns otherwise caused by transient or momentary conditions. When the pump motor is de-energized in response to an underload condition, it is automatically restarted after a predetermined time delay. All of the delay functions are precisely determined by division of the power line frequency. Downhole pressure and temperature are also sensed and if they become excessive the motor is automatically de-energized to prevent overheating. The presence of an auxiliary physical condition, such as filling up a retaining tank, also causes the pump motor to be turned off.
摘要翻译：使用固态数字逻辑控制系统获得三相潜水泵电机的完整保护，例如在油井中使用的井下型号，监控三相电流中的每一个，并将泵电机关闭，如果有的话相电流表示欠载或过载状态。在停机之前引入时间延迟，以避免由短暂或瞬时条件造成的不必要的妨扰关机。当泵电机响应于欠载状态而断电时，在预定的时间延迟之后自动重启。所有的延迟功能都通过电源线频率的划分精确地确定。还检测井下压力和温度，如果它们变得过大，则电机自动断电以防止过热。辅助物理状况的存在，例如填充保持箱，也会导致泵马达被关闭。

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