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公开(公告)号：US5106053A
公开(公告)日：1992-04-21
申请号：US612069
申请日：1990-11-09
申请人： Alan L. Miller , George H. Studtmann , Todd L. King , Kenneth R. Gallaher , Jerome J. Zawada , William P. Umlauf
发明人： Alan L. Miller , George H. Studtmann , Todd L. King , Kenneth R. Gallaher , Jerome J. Zawada , William P. Umlauf
IPC分类号： F16F9/46
CPC分类号： F16F9/46 , B60G2202/24 , B60G2500/106
摘要： A solenoid operated hydraulic control valve system including a solenoid operated valve having a specially ported spool valve to statically balance spool forces in the opened and closed positions.
摘要翻译： 一种电磁操作的液压控制阀系统，其包括具有专门阀芯的电磁阀，以在打开和关闭位置静态平衡阀芯力。
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公开(公告)号：US5110087A
公开(公告)日：1992-05-05
申请号：US718944
申请日：1991-06-21
CPC分类号： G05D16/2013 , H01F7/13 , H01F7/1638
摘要： An improved electrically actuated solenoid is used to regulate the function of a hydraulic flow control valve. The solenoid directs a control valve to generate a predetermined output pressure as a function of the solenoid input current. The working air gap surface area is increased by locating it at a greater circumferential radius than the pole piece to increase the air gap permeance, thereby increasing the output force obtainable from a solenoid of relatively small physical dimensions and low cost.
摘要翻译： 改进的电动螺线管用于调节液压流量控制阀的功能。 螺线管引导控制阀以产生作为螺线管输入电流的函数的预定输出压力。 工作气隙表面积通过将其定位在比极片更大的周向半径上来增加，以增加气隙磁导率，从而增加从具有相对小的物理尺寸和低成本的螺线管获得的输出力。
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公开(公告)号：US5216352A
公开(公告)日：1993-06-01
申请号：US619844
申请日：1990-11-29
CPC分类号： G01S19/02 , G01S19/21 , H02H3/066 , H02H3/0935 , H02H9/001 , H02M5/293 , Y10S323/901 , Y10S323/908
摘要： A solid state circuit interruption arrangement monitors a current path to provide protection to both a load and a solid state switch. The arrangement includes an energy absorber for absorbing energy from the current path in response to the solid state switch interrupting the current path, and a control circuit for periodically generating the interrupt signal to interrupt the current path for prescribed intervals and to control the current supplied to the load between a maximum current level and a minimum current level.
摘要翻译： 固态电路中断装置监视当前路径以向负载和固态开关提供保护。 该装置包括：能量吸收器，用于响应于中断电流路径的固态开关吸收来自电流通路的能量;以及控制电路，用于周期性地产生中断信号以中断电流路径达规定的间隔，并且控制提供给 最大电流电平和最小电流电平之间的负载。
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公开(公告)号：US4988967A
公开(公告)日：1991-01-29
申请号：US262152
申请日：1988-10-14
申请人： Alan L. Miller , George H. Studtmann , Todd L. King , Kenneth R. Gallaher , Jerome J. Zawada , William P. Umlauf
发明人： Alan L. Miller , George H. Studtmann , Todd L. King , Kenneth R. Gallaher , Jerome J. Zawada , William P. Umlauf
CPC分类号： F16F9/46 , B60G2202/24 , B60G2500/106
摘要： A solenoid operated hydraulic control valve which has a specially ported spool valve to statically balance spool force in the opened and closed positions, and a specially designed solenoid operator which includes very small ratios of gaps to cross-sectional areas for the working and non-working gaps between the armature and stator.
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公开(公告)号：US3953786A
公开(公告)日：1976-04-27
申请号：US128752
申请日：1971-03-29
申请人： Hsiao J. Ma , George H. Studtmann
发明人： Hsiao J. Ma , George H. Studtmann
IPC分类号： H02M7/515
CPC分类号： H02M7/5155
摘要： A static switch including main and auxiliary SCR's has a commutating capacitor coupled between the common connections of these main and auxiliary SCR's. An independent external charging circuit is provided and connected to complete a charging path for the commutating capacitor which is isolated by at least one diode from the main d-c bus. This enables the commutating capacitor to charge to a level above that of the d-c bus voltage and maintain effective commutation.
摘要翻译： 包括主和辅助SCR的静态开关具有耦合在这些主和辅助SCR的公共连接之间的换向电容器。 提供并连接独立的外部充电电路以完成用于由主d-c总线由至少一个二极管隔离的整流电容器的充电路径。 这使得换向电容器充电到高于d-c总线电压的电平，并保持有效的换向。
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公开(公告)号：US5170310A
公开(公告)日：1992-12-08
申请号：US619776
申请日：1990-11-29
摘要： A solid state circuit interruption arrangement in a distributed power network provides fast and reliable circuit interruption. A common power source provides power to a plurality of loads via respective current paths. A main circuit breaker and a plurality of solid state circuit breakers are arranged to interrupt the current paths in response to command signals sent from a central controller. Current sensors and voltage sensors are coupled to the current paths for monitoring purposes. An automatic controller responds to any of the current sensors detecting a fault condition by automatically generating a command signal, which forces the associated solid state breaker to interrupt the associated current path. Thereafter, the controller automatically generates a signal to the main circuit breaker to interrupt the power provided from the common power source in the event that the associated current path is not interrupted by the solid state breaker. Alternatively, or in addition, the main interruption device may interrupt the current path when its own internal sensing mechanism detects a magnitude of current that is beyond a predetermined level. Also, the controller automatically generates a signal to the main breaker to interrupt the power provided from the common power source in the event that any of the branch breakers fails in the "off" or interrupted, condition. Other features include a finned housing structure which provides cooling means for the breaker system without the need for cooling fans.
摘要翻译： 分布式电力网络中的固态电路中断装置提供快速可靠的电路中断。 公共电源通过相应的电流路径向多个负载提供电力。 主断路器和多个固态断路器被布置成响应于从中央控制器发送的命令信号来中断电流路径。 电流传感器和电压传感器耦合到电流路径用于监控目的。 自动控制器通过自动生成指令信号来响应任何一个检测故障状态的传感器，这些指令信号迫使相关联的固态断路器中断相关的电流路径。 此后，如果相关联的电流路径不被固态断路器中断，则控制器自动产生到主断路器的信号以中断从公共电源提供的电力。 或者，或另外，主中断装置可以在其自身的内部感测机构检测到超过预定电平的电流的大小时中断当前路径。 此外，如果任何分支断路器在“断开”或中断状态下出现故障，控制器将自动产生一个信号给主断路器，以中断从公共电源提供的电力。 其他特征包括翅片式壳体结构，其为断路器系统提供冷却装置，而不需要冷却风扇。
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公开(公告)号：US4949215A
公开(公告)日：1990-08-14
申请号：US237289
申请日：1988-08-26
IPC分类号： H01H47/32
CPC分类号： H01H47/325
摘要： A method and apparatus for solenoid driver control of high speed solenoid actuators which includes supplying a high regulated level of acceleration current to operate the actuator, monitoring and controlling the current requirements of solenoid actuation, automatically reducing the solenoid current at a rapid rate to a lesser level of regulated solenoid hold current for the remaining duration of actuator operation, and rapidly reducing the solenoid current between acceleration and holding levels and for rapid solenoid release. Current is controlled at the different levels using switch mode power control techniques for power efficiency.
摘要翻译： 一种用于高速电磁致动器的螺线管驱动器控制的方法和装置，其包括提供高调节水平的加速电流以操作致动器，监视和控制电磁致动的当前要求，以快速的速率自动将电磁线圈电流降至较小 调节螺线管的电平保持电流在执行器运行的剩余时间内，并快速减少加速度和保持电平之间的电磁线圈电流以及快速电磁阀释放。 使用开关模式功率控制技术来控制电流在不同的电平，以实现功率效率。
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公开(公告)号：US4511834A
公开(公告)日：1985-04-16
申请号：US452559
申请日：1982-12-23
申请人： George H. Studtmann
发明人： George H. Studtmann
CPC分类号： H02M5/4505 , H02P25/024
摘要： Stabilized operation of a damperless synchronous motor, which is driven by a voltage source inverter energized by a d-c bus voltage, is obtained under transient conditions, such as during sudden variations of load torque, in order to maintain the torque angle in the motor relatively stable at all times and within the stability limit. This is achieved by employing transient changes in either the d-c bus voltage, the d-c bus current or the motor voltage, which changes reflect transient variations of the torque angle, to rapidly adjust the inverter frequency as necessary to hold the torque angle reasonably constant. For example, if there is an abrupt load increase on the motor, the bus voltage tends to drop and the motor tends to slow down, the torque angle thereby tending to increase. The extent to which the angle tends to increase will, however, be rapidly reduced by dynamically decreasing the inverter frequency so that the rotating magnetic flux or mmf, produced by the stator windings of the motor, slows down to preserve the desired torque angle. When there is a normal variation in load demand, necessitating a different steady state motor speed, a set point voltage may be varied to change the amplitude and frequency of the inverter output voltage to the steady state levels needed to drive the motor at the new required speed.
摘要翻译： 在瞬时条件下，例如在负载转矩的突然变化期间，获得由由直流总线电压供电的电压源逆变器驱动的无阻尼同步电动机的稳定操作，以保持电动机中的转矩角度相对稳定 在任何时候和稳定的极限。 这通过在d-c总线电压，d-c总线电流或电机电压中的瞬态变化来实现，其改变反映扭矩角的瞬态变化，以便在必要时快速调节逆变器频率以保持转矩角度合理地恒定。 例如，如果电机上的负载急剧上升，总线电压会下降，电机趋于减速，转矩角度趋向于增加。 然而，通过动态地减小逆变器频率，使得由电动机的定子绕组产生的旋转磁通量或mmf减慢，以保持期望的扭矩角度，角度趋于增加的程度将被快速降低。 当负载需求正常变化时，需要不同的稳态电机速度，可以改变设定点电压，以将变频器输出电压的幅度和频率改变到以新的要求驱动电动机所需的稳态电平 速度。
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公开(公告)号：US4511835A
公开(公告)日：1985-04-16
申请号：US452560
申请日：1982-12-23
申请人： George H. Studtmann
发明人： George H. Studtmann
CPC分类号： H02M5/4505 , H02P25/024
摘要： A relatively simple inverter-motor system, comprising a minimum number of circuit components, is provided by employing a voltage-controlled thyristor inverter which in turn drives a synchronous motor having a leading power factor. With the motor current leading the motor voltage, the thyristor switching devices will be motor-commutated, thereby precluding the need for any auxiliary commutating elements or circuits to effect forced commutation. Since, with a leading power factor, the current through a conducting thyristor falls to zero before the thyristor has to be switched off, ample turn-off time is provided. Furthermore, as compared to a conventional forced commutated voltage source inverter, the customary reactive diodes, usually shunting the switching devices in an inverter to permit the flow of reactive motor current, are not necessary. Moreover, by powering the inverter with a voltage source, rather than with a current source, the commutation process is greatly facilitated, the need for damper windings on the motor is eliminated, and the physical size of the d-c link inductor normally required by a current source inverter is greatly reduced.
摘要翻译： 通过采用压控晶闸管逆变器来提供包括最小数量的电路部件的相对简单的逆变器 - 电动机系统，该逆变器电动机逆变器又驱动具有主导功率因数的同步电动机。 由于电动机电流导致电动机电压，晶闸管开关装置将被电动整流，从而不需要任何辅助换向元件或电路来实现强制换向。 由于具有领先的功率因数，在晶闸管必须关断之前，通过导通晶闸管的电流降至零，因此提供充足的关断时间。 此外，与传统的强制换向电压源逆变器相比，通常将逆变器中的开关装置分流以允许无功电动机电流的流动的常规无功二极管不是必需的。 此外，通过使用电压源而不是电流源为逆变器供电，大大方便了换向过程，消除了对电动机上的阻尼绕组的需要，并且直流链路电感器的物理尺寸通常由电流 源逆变器大大减少。
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10.发明授权
公开(公告)号：US4488101A
公开(公告)日：1984-12-11
申请号：US452557
申请日：1982-12-23
申请人： George H. Studtmann
发明人： George H. Studtmann
CPC分类号： H02M5/45 , H02M7/5152 , H02P1/52 , H02P25/03
摘要： If the thyristor switching devices of a chopper controlled inverter are normally motor-commutated during running operation, a starting system is needed to initially rotate the motor fast enough to develop a sufficient back EMF in the motor for motor commutation to occur. This is achieved by regulating the operation of the chopper to produce bus current pulses and by gating the thyristors on in predetermined sets and in a prescribed sequence to current pulse energize the motor to effect step-by-step rotation. After a set of conducting thryistors have supplied a bus current pulse to the motor, the reactive energy that builds up and becomes locked or stored in the inductances, through which the motor current flows, must be dissipated in order to commutate the conducting thyristors off and reduce the motor current to zero before the next set of thyristors are turned on. The required energy dissipation is accomplished by a circuit path which is effective during the intervals between the bus current pulses from the chopper. A d-c voltage source, in the circuit path causes the reactive energy to be rapidly absorbed, to permit faster turn on of the next set of thyristors and consequently faster starting. Once the motor has reached a speed sufficiently high to permit motor commutation to occur, and SCR is gated on to by-pass the d-c voltage source and provide a low loss free-wheeling path for reactive energy during running operation of the system.
摘要翻译： 如果斩波控制逆变器的晶闸管开关器件在运行过程中正常电机换向，则需要启动系统来最初使电机快速旋转，以在电动机中产生足够的反电动势，以实现电机换向。 这是通过调节斩波器的操作来产生总线电流脉冲，并且通过以预定的组合并以规定的顺序选通晶闸管来实现电流脉冲通电以实现逐步旋转。 在一组导通晶闸管向电动机提供总线电流脉冲之后，必须耗散建立并被锁定或存储在电动机电流流动的电感中的无功电能，以便将导通晶闸管换向和 在下一组晶闸管接通之前，将电机电流降至零。 所需的能量消耗通过在来自斩波器的总线电流脉冲之间的间隔期间有效的电路路径来实现。 电路中的d-c电压源导致无功电能被快速吸收，从而允许更快地启动下一组晶闸管，从而更快的启动。 一旦电动机已经达到足够高的速度以允许发生电动机换向，并且SCR被选通以绕过d-c电压源，并在系统的运行操作期间提供用于无功电能的低损耗续流路径。
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