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1. 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。

2. 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.

3. 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.

4. 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。

5. 发明授权

US5456115A Method of counterflow through a pump and method of controlling the operation of a pump in a pumping installation 失效
标题翻译：通过泵逆流的方法和在泵送装置中控制泵的操作的方法
公开(公告)号：US5456115A
公开(公告)日：1995-10-10
申请号：US102041
申请日：1993-08-04
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 , G01H17/00
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。

6. 发明授权

US5561358A Variable speed pumping-up generator 失效
标题翻译：变速泵送发电机
公开(公告)号：US5561358A
公开(公告)日：1996-10-01
申请号：US360029
申请日：1994-12-20
申请人： Takao Kuwabara , Masataka Harada , Yasuteru Oono , Hiroto Nakagawa
发明人： Takao Kuwabara , Masataka Harada , Yasuteru Oono , Hiroto Nakagawa
IPC分类号： F03B15/04 , H02P9/00 , H02P9/04 , H02P9/42 , H02P23/00 , H02K7/18
CPC分类号： H02P9/42 , H02P2101/10 , Y02E10/226
摘要： A variable speed pumping up generator includes a first speed control unit for outputting a rotating speed command signal for controlling a pump turbine in accordance with a power output command and outputting an excitation control signal to an AC excitation unit of the generator, and a second speed control unit for controlling, in a generation mode, an amount of AC excitation from an AC excitation unit when a rotating speed of a rotary shaft departs from a lower limit setting or an upper limit setting. The setting is set in accordance with the rotating speed generated during a normal operation.
摘要翻译：变速泵送发电机包括：第一速度控制单元，用于根据功率输出命令输出用于控制泵涡轮的转速指令信号，并将励磁控制信号输出到发电机的交流励磁单元;第二速度控制单元，用于在发电模式下，当旋转轴的转速离开下限设定或上限设定时，控制来自交流励磁单元的交流励磁量。该设定是根据正常运转时产生的转速设定的。

7. 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。

8. 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。

9. 发明授权

US4812729A Protecting apparatus for secondary excitation type variable speed AC generator/motor 失效
标题翻译：二次励磁式变速交流发电机/电机保护装置
公开(公告)号：US4812729A
公开(公告)日：1989-03-14
申请号：US84805
申请日：1987-08-13
申请人： Akio Ito , Hidenori Sawa , Hiroshi Sugisaka , Shigeaki Hayashi , Hiroto Nakagawa , Yasuteru Oono , Eiji Haraguchi
发明人： Akio Ito , Hidenori Sawa , Hiroshi Sugisaka , Shigeaki Hayashi , Hiroto Nakagawa , Yasuteru Oono , Eiji Haraguchi
IPC分类号： H02H7/12 , H02H7/125 , H02P9/42 , H02P5/40
CPC分类号： H02H7/1216 , H02P9/007 , H02P9/10 , H02H7/1255
摘要： There is disclosed a protecting apparatus for a secondary excitation type variable speed AC generator/motor having a primary winding connected to an electric power system and a secondary winding each phase of which is AC excited by an independent power converter unit. The protecting apparatus is arranged to detect an electrical event which includes at least one of an overvoltage and overcurrent appearing at each phase of the secondary winding of the AC generator/motor, to decide whether the detected electrical event meets a predetermined condition and to close, when the electrical event detected in respect to any of phases of the secondary winding is decided as meeting the predetermined condition, a switch circuit connected in the corresponding phase of the secondary winding.
摘要翻译：公开了一种用于次级励磁型变速交流发电机/电动机的保护装置，其具有连接到电力系统的初级绕组和每个相位由独立的功率转换器单元交流激励的次级绕组。保护装置被设置为检测包括在AC发电机/电动机的次级绕组的每个相出现的过电压和过电流中的至少一个的电气事件，以确定检测到的电气事件是否满足预定条件并关闭，当检测到相对于次级绕组中的任一阶段的电气事件被确定为满足预定条件时，连接在次级绕组的相应相位上的开关电路。

10. 发明授权

US4870339A Variable-speed power generating system 失效
标题翻译：变速发电系统
公开(公告)号：US4870339A
公开(公告)日：1989-09-26
申请号：US144108
申请日：1988-01-15
申请人： Yosio Furukawa , Yasuhiro Yasaka , Osamu Nagura , Eiji Haraguchi , Hiroto Nakagawa , Yasuteru Oono
发明人： Yosio Furukawa , Yasuhiro Yasaka , Osamu Nagura , Eiji Haraguchi , Hiroto Nakagawa , Yasuteru Oono
IPC分类号： H02P9/00 , H02P9/14 , H02P9/42
CPC分类号： H02P9/007 , H02P9/42 , H02P2101/10 , Y10T307/735
摘要： A variable-speed power generating system comprises a variable-speed generator electrically connected at its primary winding to an electric power system and its secondary winding to the electric power system through a frequency converter and mechanically coupled to a driver driving the secondary side thereof, a phase detector generating an output signal representing a slip frequency in response to the application of a first input having a frequency component of an output generated from the primary winding of the variable-speed generator and a second input having a frequency component corresponding to the rotation speed of the driver, a controller controlling the frequency converter on the basis of a reference phase provided by the output signal of the phase detector, and regulating means for controlling the frequency converter so that, when the variable-speed generator is disconnected from the electric power system, the frequency applied to the secondary winding of the variable-speed generator may not deviate from a predetermined allowable range of variable frequency operation of the frequency converter.

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