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11. 发明授权

US5265002A Fault protection for a multiphase bridge power converter 失效
标题翻译：多相桥式电源转换器的故障保护
公开(公告)号：US5265002A
公开(公告)日：1993-11-23
申请号：US757334
申请日：1991-09-10
申请人： Akira Bando , Chikara Tanaka , Keiji Saito , Tadao Kawai , Eizo Kita , Keiichi Mitsuhashi , Yasuteru Oono , Hiroto Nakagawa
发明人： Akira Bando , Chikara Tanaka , Keiji Saito , Tadao Kawai , Eizo Kita , Keiichi Mitsuhashi , Yasuteru Oono , Hiroto Nakagawa
IPC分类号： H02H7/12 , H02H7/125 , H02M7/12 , H02M7/155 , H02M7/162
CPC分类号： H02H7/125
摘要： A semiconductor power conversion system comprising a multiphase bridge circuit which includes semiconductor devices having a controllable firing function and a reverse blocking characteristic, a gate control circuit which gives firing commands to the semiconductor devices, a short circuiting switch in which switching devices having a controllable firing function and a reverse blocking characteristic are connected in parallel with a DC output side of the multiphase bridge circuit, and a protection control device for performing a control for protecting the multiphase bridge circuit. The protection control device includes a device for detecting a commutation failure of the multiphase bridge circuit, and a device in response to the detection of the commutation failure for producing a blocking command for blocking the firing of the semiconductor devices of the multiphase bridge circuit and producing a short-circuiting command for firing the switching device which is short-circuited which bypasses current of the commutation failure. The protection control device further includes a device for detecting ending of a short-circuit based on the ceasing of current conduction of the short circuiting switch and for halting the blocking of the firing of the semiconductor devices of the multiphase bridge circuit.
摘要翻译：一种半导体功率转换系统，包括多相桥式电路，其包括具有可控的点火功能和反向阻断特性的半导体器件，向半导体器件发出触发命令的栅极控制电路，其中具有可控射击的开关器件的短路开关功能和反向阻断特性与多相桥式电路的直流输出侧并联连接，以及保护控制装置，用于进行保护多相桥式电路的控制。保护控制装置包括用于检测多相桥式电路的换向故障的装置，以及响应于检测到换向失败的装置，用于产生用于阻断多相桥式电路的半导体装置的点火的阻塞命令并产生用于点燃短路的开关器件的短路命令，其绕过换向故障的电流。保护控制装置还包括用于基于短路开关的电流导通的停止以及用于停止多相桥式电路的半导体装置的点火来检测短路结束的装置。

12. 发明授权

US5099409A Semiconductor electric power conversion system enabling fault and/or overtemperature protection 失效
标题翻译：半导体电力转换系统启用故障和/或过压保护
公开(公告)号：US5099409A
公开(公告)日：1992-03-24
申请号：US496302
申请日：1990-03-20
申请人： Akira Bando , Chikara Tanaka , Keiji Saito , Tadao Kawai , Eizo Kita , Keiichi Mitsuhashi , Yasuteru Ohno , Hiroto Nakagawa
发明人： Akira Bando , Chikara Tanaka , Keiji Saito , Tadao Kawai , Eizo Kita , Keiichi Mitsuhashi , Yasuteru Ohno , Hiroto Nakagawa
IPC分类号： H02H7/12 , H02H7/122 , H02H7/125 , H02M7/162 , H02P9/00
CPC分类号： H02M7/1623 , H02H7/1255
摘要： An improved electric power conversion system comprising a multi-phase bridge circuit composed of semiconductors such as thyristors and an associated firing circuit. It is so constructed that: if the AC input current Iac flowing in the bridge circuit is equal to or larger in value that the DC output current Idc flowing out of the bridge circuit, it will be decided than an inner defect or fault is caused, and possible expansion of inner defect will be prevented by disabling the firing circuit to extinguish the thyristors in the bridge circuit, and if the AC input current Iac is smaller than the DC output current Idc in value, the bridge is permitted to continue the operation of power conversion, thus eliminating unnecessary interruption which otherwise would be caused by exterior disturbances. Also, an improved electric power conversion system may be equipped with a device to prevent an adverse effect from being caused by abnormal rise of thyristors' temperature.

13. 发明授权

US4952852A Power system and synchronizing breakers for a variable speed generator motor system 失效
标题翻译：用于变速发电机电机系统的电力系统和同步断路器
公开(公告)号：US4952852A
公开(公告)日：1990-08-28
申请号：US229995
申请日：1988-08-09
申请人： Akira Bando , Osamu Nagura , Keiji Saito , Ikuro Miyashita , Hashime Nagai , Hiroto Nakagawa , Yasuteru Oono
发明人： Akira Bando , Osamu Nagura , Keiji Saito , Ikuro Miyashita , Hashime Nagai , Hiroto Nakagawa , Yasuteru Oono
IPC分类号： H02P9/00 , H02H7/06
CPC分类号： H02H7/06
摘要： A generator-motor apparatus with economical protection measures for use in a variable speed pumping-up electric power plant, having a main transformer, a secondary winding of which is coupled to an electric power system, a power system breaker connected to a primary winding of the main transformer, a syncronizing breaker connected in series with the power system breaker, a generator-motor, a rotor of which is mechanically coupled to the pump-turbine and an armature winding of which is connected to the power system through the synchronizing breaker, the power system breaker and the main transformer, and an excitation circuit, including a frequency converter for supplying a field winding of the generator-motor with AC voltage of the variable frequency and a converter transformer for feeding the converter, which is branched from a junction of the power system breaker and the synchronizing breaker.

14. 发明授权

US5026256A Variable speed pumping-up system 失效
标题翻译：变速抽油系统
公开(公告)号：US5026256A
公开(公告)日：1991-06-25
申请号：US285753
申请日：1988-12-16
申请人： Takao Kuwabara , Hisao Inoue , Hiroto Nakagawa , Eizo Kita
发明人： Takao Kuwabara , Hisao Inoue , Hiroto Nakagawa , Eizo Kita
IPC分类号： F03B15/06
CPC分类号： F03B15/06 , Y02E10/226
摘要： The operation of a variable speed electric driven pump turbine is monitored continuously during pumping to detect the operation point of the pump turbine, and to prevent it from falling into a hump characteristic region, which is recognizable on a graph of total dynamic head versus flow rate. Stalling occurs in the hump characteristic region as a result of a partial reverse flow of the water with respect to the runner. When the operation point of the pump turbine approaches the hump characteristic region, a corrective action is taken that includes increasing the output level of the electric driven pump turbine to increase its rotating speed, temporarily.

15. 发明授权

US4980629A AC-excited generator/motor apparatus 失效
标题翻译：交流励磁发电机/电机装置
公开(公告)号：US4980629A
公开(公告)日：1990-12-25
申请号：US319708
申请日：1989-03-07
申请人： Akira Bando , Osamu Nagura , Shigehiro Kayukawa , Junichi Shiozaki , Akira Momiyama , Hiroto Nakagawa , Yasuteru Oono
发明人： Akira Bando , Osamu Nagura , Shigehiro Kayukawa , Junichi Shiozaki , Akira Momiyama , Hiroto Nakagawa , Yasuteru Oono
IPC分类号： H02P9/14 , H02H7/06 , H02P9/00 , H02P9/10 , H02P9/42
CPC分类号： H02P9/42 , H02P9/007 , H02P9/105 , H02P2101/10
摘要： An AC-excited generator/motor apparatus comprising; an AC-excited generator/motor having an armature mounting thereon; an armature winding connected to an AC power system and a rotor mounting thereon; and an exciting winding excited by an AC current. An exciting device for supplying a controlled AC exciting current to the exciting winding comprises; a device for calculating a real slip frequency based on a difference between the phase of an armature voltage appearing on the armature winding and the rotational phase of the rotor; and a device for controlling the exciting current supplied to the exciting winding from the exciting means in response to a deviation of the real slip frequency from a predetermined allowable range of slip frequencies so as to restore the real slip frequency within the allowable range of slip frequencies.
摘要翻译：一种AC励磁发电机/电动机装置，包括：其上安装有电枢的AC励磁发电机/电动机; 连接到AC电力系统的电枢绕组和安装在其上的转子; 和由交流电流激发的激励绕组。用于向励磁绕组提供控制的交流励磁电流的励磁装置包括：基于电枢绕组上出现的电枢电压的相位与转子的旋转相位之间的差来计算实际转差频率的装置; 以及用于响应于实际滑移频率与预定的滑差频率的允许范围的偏差来控制从励磁装置提供给励磁绕组的励磁电流的装置，以便将滑差频率恢复在滑差频率的允许范围内。

16. 发明授权

US06336322B1 Method of controlling a pump turbine 有权
标题翻译：控制水轮机的方法
公开(公告)号：US06336322B1
公开(公告)日：2002-01-08
申请号：US09707843
申请日：2000-11-08
申请人： Takao Kuwabara , Kei Katayama , Hiroto Nakagawa , Haruki Hagiwara
发明人： Takao Kuwabara , Kei Katayama , Hiroto Nakagawa , Haruki Hagiwara
IPC分类号： F16D3100
CPC分类号： F16D33/08
摘要： An object of the present invention is to provide a pump turbine capable of improving the stability of the governor by fully lessening the influences by the S-characteristics even when the running point of the pump turbine is in the S-characteristics region. For this purpose, in a pump turbine comprising a runner which is coupled with a generator motor, discharge control apparatus for controlling the quantity of water passing through the runner, and a governor for controlling said discharge control apparatus to keep the runner speed at a predetermined speed, the arithmetic apparatus of said governor is controlled to temporarily open said closing discharge control apparatus in the leading half of the speed decrease or earlier after the first speed increase upon a load rejection turns to a speed decrease upon a load rejection which abruptly shuts off power from the generator motor, so that the rotational speed of the runner goes down at much slower rate than the rate of increasing immediately after a load rejection.
摘要翻译：本发明的目的是提供一种能够通过充分减小S特性的影响来提高调速器的稳定性的泵式涡轮机，即使在泵用涡轮机的运转点处于S特性区域的情况下也是如此。为此，在包括与发电电动机连接的转轮的泵式涡轮机中，用于控制通过转轮的水量的排放控制装置，以及用于控制所述排出控制装置的调速器，以将转轮速度保持在预定的速度控制速度，所述调速器的运算装置被控制为在减速的前半部分中暂时打开所述关闭放电控制装置，或者在第一速度增加之后，当负载抑制转变为急剧关闭的负载抑制时的速度降低时来自发电机电动机的动力，使得转轮的转速比在负载排斥后立即增加的速率慢得多的速度下降。

17. 发明授权

US5090872A Method of controlling the operation of a pump in a pumping installation by detecting counterflow 失效
标题翻译：通过检测逆流来控制泵送设备中的泵的操作的方法
公开(公告)号：US5090872A
公开(公告)日：1992-02-25
申请号：US441639
申请日：1989-11-27
申请人： Takao Kuwabara , Ezo Kita , Isao Yokoyama , Hiroto Nakagawa , Yasuteru Oono
发明人： Takao Kuwabara , Ezo Kita , Isao Yokoyama , Hiroto Nakagawa , Yasuteru Oono
IPC分类号： F03B15/04 , F03B15/02 , F03B15/08 , F04B49/06 , F04D15/00 , F04D15/02
CPC分类号： F04D15/029 , F04B49/065 , F04D15/0027 , F04D15/0066 , Y02E10/226
摘要： A method of detecting a counterflow in a pump comprises providing with detecting means for detecting variations in the discharge pressure of the pump and signal analyzing means for analyzing oscillation components contained in an output signal from the pressure detecting means, and detecting the pump's operating point to have entered a counterflow characteristic operation region when a waveform of the detection signal generated in association with the variations in the discharge pressure of the pump exhibits a predetermined spectrum distribution. Further, when it is detected that the operating point enters a counterflow characteristic operation region, the escape from that region is performed by temporally throttling the guide vane and temporally increasing the rotating speed.
摘要翻译：一种在泵中检测逆流的方法，包括提供检测装置，用于检测泵的排出压力的变化;以及信号分析装置，用于分析包含在来自压力检测装置的输出信号中的振荡分量，并且检测泵的工作点当与泵的排出压力的变化相关联地生成的检测信号的波形呈现预定的频谱分布时，进入逆流特性操作区域。此外，当检测到工作点进入逆流特性操作区域时，通过对导向叶片进行暂时节流并且暂时提高转速来执行从该区域的逸出。

18. 发明授权

US4920277A Control system for a variable speed hydro-power plant apparatus 失效
标题翻译：变速水电站装置的控制系统
公开(公告)号：US4920277A
公开(公告)日：1990-04-24
申请号：US230434
申请日：1988-08-10
申请人： Takao Kuwabara , Hiroto Nakagawa , Eizo Kita
发明人： Takao Kuwabara , Hiroto Nakagawa , Eizo Kita
IPC分类号： F03B15/06
CPC分类号： F03B15/06 , Y02E10/226
摘要： A variable speed hydro-power plant includes a pump turbine (2) having a S-shaped characteristics at the turbine operation. A current time turbine operating point is grasped on a turbine characteristics diagram of the pump turbine (2). A limit operation characteristics curve (nr) of the pump turbine (2) is formed in advance so as to not reach the S-shaped characteristics turbine operation region. A reach of the limit operation characteristics curve (nr) is detected, a rotating speed (N) of the pump turbine (2) is lowered. An inrush of the pump turbine (2) into the S-shaped characteristics turbine operation region is eliminated, so the continuation of a stable and reliable turbine operation can be guaranteed.

19. 发明授权

US4812730A Variable-speed generator/motor system 失效
标题翻译：变速发电机/电机系统
公开(公告)号：US4812730A
公开(公告)日：1989-03-14
申请号：US35035
申请日：1987-04-06
申请人： Hiroto Nakagawa , Yasuteru Oono , Tadaatsu Kato , Osamu Nagura , Sadahiko Niwa , Yosio Furukawa , Shigehiro Kayukawa
发明人： Hiroto Nakagawa , Yasuteru Oono , Tadaatsu Kato , Osamu Nagura , Sadahiko Niwa , Yosio Furukawa , Shigehiro Kayukawa
IPC分类号： H02J3/38 , H02P9/00 , H02P9/10 , H02P9/14 , H02P9/42 , H02P23/00 , H02P5/40
CPC分类号： H02J3/38 , H02P9/007 , H02P9/42 , H02P2101/10
摘要： A generator/motor system comprises a generator/motor having a primary winding and a secondary winding installed on the motor rotor coupled to a prime mover/load, a main circuit interposed between a power system and the primary winding of the generator/motor, an excitation circuit including a frequency converter inserted between a part of the main circuit and the secondary winding of the generator/motor, a frequency difference detector for determining the difference between the frequency of the power system and a frequency dependent on the rotational speed of the load, and a phase-shift control device for controlling the firing phase of the frequency converter in the excitation circuit by use of a signal from the frequency difference detector as a reference signal. In normal operation, a frequency signal following the frequency of the power system is produced, while at the time of a disturbance of the power system, the same frequency signal of the power system as before the disturbance continues to be produced thereby to keep the system in stable operation. For this purpose, a starting electric machine, a synchronous motor and a synchronous generator are aligned, and an output of the synchronous generator is applied to the frequency difference detector.
摘要翻译：发电机/电动机系统包括发电机/电动机，其具有安装在电动机转子上的初级绕组和次级绕组，所述初级绕组和次级绕组连接到原动机/负载，插入电力系统和发电机/电动机的初级绕组之间的主电路，励磁电路，包括插入在主电路的一部分和发电机/电动机的次级绕组之间的变频器;频差检测器，用于确定电力系统的频率与取决于负载的转速的频率之间的差以及相移控制装置，用于通过使用来自频差检测器的信号作为参考信号来控制激励电路中的变频器的点火相位。在正常运行中，产生跟随电力系统频率的频率信号，而在电力系统干扰的时刻，电力系统的频率信号与干扰之前的相同频率信号继续产生，从而保持系统稳定运行。为此，起动电机，同步电动机和同步发电机对准，同步发电机的输出被施加到频率差检测器。

20. 发明授权

US08699402B2 Multi-hop relay radio communication system, access gateway, and route selection method 失效
标题翻译：多跳中继无线通信系统，接入网关和路由选择方法
公开(公告)号：US08699402B2
公开(公告)日：2014-04-15
申请号：US13146824
申请日：2009-02-06
申请人： Hiroto Nakagawa , Koji Watanabe
发明人： Hiroto Nakagawa , Koji Watanabe
IPC分类号： H04W40/12 , H04W40/22
CPC分类号： H04W40/22 , H04B7/2606 , H04W40/12
摘要： A multi-hop relay wireless communication system provided with an AGW (2), a policy controller (3), a base station (4), one or more relay stations (6), and a mobile station (7) collects data path setting information into the AGW (2) after the establishment of the wireless links between the base station and the relay stations and between the relay stations and the mobile station, selects a relay station (6) which becomes the data path from the one or more relay stations by using the collected information, and sets the optimal path from the AGW (2) to the mobile station (7).
摘要翻译：具有AGW（2），策略控制器（3），基站（4），一个或多个中继站（6）和移动站（7）的多跳中继无线通信系统收集数据路径设置在建立基站与中继站之间以及中继站与移动台之间的无线链路之后，向AGW（2）发送信息，从一个以上的中继站选择成为数据路径的中继站（6）通过使用所收集的信息，并且设置从AGW（2）到移动台（7）的最佳路径。

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