专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4847723A Volt-per-hertz protection apparatus 失效
标题翻译：每赫兹保护装置
公开(公告)号：US4847723A
公开(公告)日：1989-07-11
申请号：US196697
申请日：1988-05-20
申请人： Donald S. Kimmel
发明人： Donald S. Kimmel
IPC分类号： H02H3/027 , H02H7/04
CPC分类号： H02H3/027 , H02H7/04
摘要： An inverse-time timer for a volt/Hertz ratio relay includes a ladder of level detectors associated with a like series of counters connected in cascade with a variable voltage-to-frequency connector responsive to the v/Hz ratio signal for controlling the counters to establish the time delay for tripping.
摘要翻译：用于伏特/赫兹比继电器的反时限定时器包括电平检测器梯形图，其与与可变电压 - 频率连接器级联连接的相似系列计数器相关联，其响应于v / Hz比率信号，用于控制计数器建立跳闸的延时。

2. 发明授权

US4454428A Noise reduction means for a dynamic stabilizer for synchronous machines having torsional oscillations and method 失效
标题翻译：用于具有扭转振荡和方法的同步电机的动态稳定器的降噪装置
公开(公告)号：US4454428A
公开(公告)日：1984-06-12
申请号：US285886
申请日：1981-07-22
申请人： Donald S. Kimmel , William H. South
发明人： Donald S. Kimmel , William H. South
IPC分类号： H02P9/00 , F16F15/02 , F16F15/18 , H02P9/10 , H02P21/00 , H02P9/04 , H02H7/06
CPC分类号： F16F15/02 , F16F15/18 , H02P9/10 , B60L2270/145 , Y02T10/642
摘要： Signal conditioning apparatus for reducing the noise frequencies of a speed sensing means signal being fed into a compensating means for compensating the output of a synchronous generator for the effect of torsional oscillation between masses in the main AC generator system. The signal conditioning apparatus includes two speed sensing transducers mounted 180.degree. apart on opposite sides of a tooth gear wheel and summing the two FM output signals from the transducers to eliminate odd harmonics of the synchronous frequency in FM noise due to eccentricity. The preferred embodiment of the invention reduces the remaining noise from the sensed speed signal by the use of a three-pole Butterworth low-pass filter in combination with a notch filter tuned to the turbine-generator synchronous frequency to thereby reduce the unwanted noise to a large degree while providing a minimal phase shift to the sensed speed signal. Another embodiment of the invention may be used to determine the machining accuracy of the toothed gear wheel.
摘要翻译：用于降低速度检测装置信号的噪声频率的信号调节装置被馈送到补偿装置，用于补偿同步发电机的输出，用于在主交流发电机系统中的质量之间的扭转振荡的影响。信号调节装置包括两个速度传感传感器，它们在齿轮的相对侧分开180度，并将来自传感器的两个FM输出信号相加，以消除由于偏心引起的FM噪声中同步频率的奇次谐波。本发明的优选实施例通过使用三极巴特沃斯低通滤波器与调谐到涡轮发电机同步频率的陷波滤波器组合来减少来自感测速度信号的剩余噪声，从而将不想要的噪声减少到同时向所感测的速度信号提供最小的相移。本发明的另一实施例可用于确定齿轮的加工精度。

3. 发明授权

US4021703A Phase imbalance detection circuit 失效
标题翻译：相位不平衡检测电路
公开(公告)号：US4021703A
公开(公告)日：1977-05-03
申请号：US583219
申请日：1975-06-02
申请人： Wardell Gary , Glenn R. Taylor , Donald S. Kimmel
发明人： Wardell Gary , Glenn R. Taylor , Donald S. Kimmel
IPC分类号： H02H3/02 , H02H3/12 , H02H3/34 , H02H3/353
CPC分类号： H02H3/34 , H02H3/353
摘要： A phase imbalance logic module for a solid state motor protection system for a three-phase motor. Three-phase line currents are converted to corresponding voltages and rectified. The resultant output voltage is a poorly regulated DC voltage having a ripple of approximately 4% during normal operating conditions. In the event of a phase failure, even if not total, the corresponding ripple percentage increases. The phase imbalance logic network senses ripple and provides an output signal to trip a protective circuit breaker if the component of ripple becomes significantly large.
摘要翻译：用于三相电动机的固态电动机保护系统的相位不平衡逻辑模块。三相线路电流转换为相应的电压并整流。所得到的输出电压是在正常操作条件下具有约4％波动的调节不良的直流电压。在相位故障的情况下，即使不是总计，相应的波动百分比也会增加。相位不平衡逻辑网络检测纹波，并提供一个输出信号，以便在纹波分量变得非常大时跳闸保护断路器。

4. 发明授权

US4007401A Current sensitive circuit protection system 失效
标题翻译：电流敏感电路保护系统
公开(公告)号：US4007401A
公开(公告)日：1977-02-08
申请号：US504405
申请日：1974-09-09
申请人： Donald S. Kimmel , Wardell Gary , Glenn R. Taylor
发明人： Donald S. Kimmel , Wardell Gary , Glenn R. Taylor
IPC分类号： H02H3/08 , H02H1/00 , H02H3/093 , H02H3/10 , H02H7/08
CPC分类号： H02H3/10 , H02H1/00 , H02H3/093
摘要： An electrical control system which is utilized for opening a circuit breaker which is connected to a load to be protected. The control system comprises a unitary current sensor module which senses current flowing in the load to be protected. The sensor is adapted to have connected at the output thereof a load resistor which is capable of cooperating with the sensed current to provide a range of voltage over which a set of plug-in modules are operable to either provide an indication of characteristics associated with the current or the load or to provide an output function which is adapted to open the circuit breaker. The load resistor is replaceable with other load resistors so that the voltage range may be maintained even though the expected value of currents to be sensed by the sensor may change depending upon the load and other circuit characteristics.
摘要翻译：一种用于打开断路器的电气控制系统，该断路器连接到待保护的负载。该控制系统包括一个单一的电流传感器模块，其感测在待保护的负载中流动的电流。传感器适于在其输出处连接有负载电阻器，该负载电阻器能够与所感测的电流配合以提供一定范围的电压，一组插件模块可通过该电压范围来提供与该电压相关联的特性的指示电流或负载或提供适于打开断路器的输出功能。负载电阻可以与其他负载电阻器替换，以便即使传感器感测到的电流的预期值可能根据负载和其他电路特性而改变，也可以保持电压范围。

5. 发明授权

US5305234A Thermal protection apparatus for a synchronous machine 失效
标题翻译：同步电机热保护装置
公开(公告)号：US5305234A
公开(公告)日：1994-04-19
申请号：US815678
申请日：1991-12-31
申请人： David R. Markus , Kenneth M. Eichler , Donald S. Kimmel , Gerhard K. Kasprowicz , Robert S. Murray
发明人： David R. Markus , Kenneth M. Eichler , Donald S. Kimmel , Gerhard K. Kasprowicz , Robert S. Murray
IPC分类号： H02H6/00 , H02H7/06
CPC分类号： H02H7/06 , H02H6/005 , Y10S388/934
摘要： A synchronous machine is protected from closely spaced instances of excessive field current and an excessive volts/hertz ratio by a control system which models rotor and stator cooling to provide memory of recent periods of excessive heating. Maximum excitation limiting and volts/hertz ratio limiting modules in a microprocessor based automatic voltage regulator for the machine generate time delayed limit signals which override voltage feedback control when the respective parameters exceed threshold values. The limiters each increment a count when the associated threshold value is exceeded and generate the associated limit signal when a predetermined count is reached. The predetermined counts and the counting rates are selected such that the delay intervals are inversely proportional to the amount by which the threshold values are exceeded. The counts are decremented at a rate which models rotor and stator cooling when the respective parameters return below the threshold values. If another event occurs before the count reaches zero, the delay before limiting action is reinitiated is shortened by an amount related to the residual heating.
摘要翻译：通过对转子和定子冷却进行建模的控制系统来保护同步电机免受过大的励磁电流和过大的电压/赫兹比的紧密间隔的情况，以提供最近的过度加热周期的记忆。用于机器的基于微处理器的自动电压调节器中的最大励磁限制和伏特/赫兹比限制模块产生时间延迟限制信号，当相应的参数超过阈值时，它们将覆盖电压反馈控制。当超过相关联的阈值时，限制器各自递增计数，并且当达到预定计数时产生相关的限制信号。选择预定计数和计数速率使得延迟间隔与超过阈值的量成反比。当各个参数返回到阈值以下时，计数以递减转速和定子冷却的速率递减。如果在计数达到零之前发生另一个事件，则限制动作之前的延迟被重新启动被缩短与残余加热有关的量。

6. 发明授权

US5264778A Apparatus protecting a synchronous machine from under excitation 失效
标题翻译：保护同步电机免受激励的装置
公开(公告)号：US5264778A
公开(公告)日：1993-11-23
申请号：US815676
申请日：1991-12-31
申请人： Donald S. Kimmel , Charles R. Mummert , Kenneth M. Eichler , David R. Markus
发明人： Donald S. Kimmel , Charles R. Mummert , Kenneth M. Eichler , David R. Markus
IPC分类号： H02H7/06 , H02P9/30 , H02P9/14
CPC分类号： H02P9/30 , H02H7/065 , Y10S174/17
摘要： Apparatus for protecting a synchronous generator from under-excitation, includes a limiter implemented as part of a microprocessor based voltage regulator. The limiter selectively characterizes one or more limiting parameters, such as, system stability, machine capability and loss of field protection, as straight line segments in the real/reactive power plane to provide versatile, easily modified limits on excitation.
摘要翻译：用于保护同步发电机不受激励的装置包括作为基于微处理器的电压调节器的一部分实现的限幅器。限制器选择性地表征一个或多个限制参数，例如系统稳定性，机器能力和现场保护损失，作为实际/无功功率平面中的直线段，以提供通用，易于修改的激励限制。

7. 发明授权

US4170037A Lock-out logic circuit for inverter protection 失效
标题翻译：用于逆变器保护的锁定逻辑电路
公开(公告)号：US4170037A
公开(公告)日：1979-10-02
申请号：US931067
申请日：1978-08-04
申请人： Donald S. Kimmel
发明人： Donald S. Kimmel
IPC分类号： H02M1/00 , H02M1/38 , H02M7/525 , H02M1/18
CPC分类号： H02M1/38 , H02M7/525
摘要： A lock-out control logic circuit for a feedback inverter system, which senses the load current in each load switching element of the inverter system and utilizes the sensed current through the presently conducting load switching element to inhibit the next firing of the presently non-conducting load switching element. Current transformers are inserted in series with each switching element and coupled to a CMOS logic circuit which inhibits the firing pulse to a non-conducting load switching element in the event a current conduction condition is sensed.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式