公开(公告)号：US4878208A

公开(公告)日：1989-10-31

申请号：US250853

申请日：1988-09-29

申请人： Nagataka Seki ,  Kiyoshi Ogawa ,  Kihei Nakajima

发明人： Nagataka Seki ,  Kiyoshi Ogawa ,  Kihei Nakajima

IPC分类号： H02J3/38 ,  H02M7/48

CPC分类号： H02J3/38 ,  Y10T307/511

摘要： In a system interconnecting inverter apparatus, an inverter for controlling power of an AC power system is coupled, via a coupling reactor, to the AC power system having a system voltage. A system phase signal indicating the phase of the system voltage is detected by a system phase detection circuit in real time. Another phase signal indicating the phase of the system voltage is detected by a comparison phase detection circuit with a predetermined delay time, and the detection result is temporarily stored in the circuit as a comparison phase signal. The system phase signal and the comparison phase signal are phase-compared by a stop circuit. When a phase difference between the system phase signal and the comparison phase signal exceeds a predetermined value, the stop circuit stops the operation of the inverter.

公开(公告)号：US4301500A

公开(公告)日：1981-11-17

申请号：US122826

申请日：1980-02-19

申请人： Nagataka Seki ,  Yukinori Tsuruta

发明人： Nagataka Seki ,  Yukinori Tsuruta

IPC分类号： H02M1/06 ,  H02M7/515 ,  H02M7/527 ,  H02H7/122

CPC分类号： H02M7/527

摘要： There are arranged an oscillator for generating a first pulse signal on which the AC output frequency of the inverter is based, a delay circuit for generating a second pulse signal delayed for a predetermined period of time from the first pulse signal, and a ring counter for generating responsive to the second pulse signal a phase reference signal corresponding in phase to the AC output of the inverter. An ON pulse is generated responsive to the second pulse and the phase reference signal and an OFF pulse responsive to the first pulse and the phase reference signal. A negative bias signal is generated following the OFF pulse. At the time of operation stop the negative bias signal following the ON and OFF pulses is applied to GTO thyristors simultaneously.

摘要翻译： 设置有用于产生逆变器的交流输出频率所基于的第一脉冲信号的振荡器，用于产生从第一脉冲信号延迟预定时间段的第二脉冲信号的延迟电路，以及用于 响应于所述第二脉冲信号产生相应于所述逆变器的AC输出的相位参考信号。 响应于第二脉冲和相位参考信号产生ON脉冲，响应于第一脉冲和相位参考信号产生OFF脉冲。 在OFF脉冲之后产生负偏置信号。 在运行停止时，ON和OFF脉冲之后的负偏置信号同时施加到GTO晶闸管。

公开(公告)号：US4667283A

公开(公告)日：1987-05-19

申请号：US796735

申请日：1985-11-12

申请人： Nagataka Seki ,  Kouichi Kaneko

发明人： Nagataka Seki ,  Kouichi Kaneko

IPC分类号： H02M7/48

CPC分类号： H02M7/48

摘要： A power converter apparatus for use in supplying power from a DC power source to a load, including a chopper connected to the DC power source; an inverter connected to a DC output of the chopper for supplying converted AC power to the load; an error amplifier for detecting an output voltage of the power converter apparatus and controlling the output voltage so as to maintain the output voltage equal to a predetermined reference value; and a voltage control circuit for generating a gate signal for the chopper, including an oscillator circuit for producing a variable frequency signal having a frequency varied in accordance with an output signal of the error amplifier, and a phase shifter for producing the gate signal with a pulse width varied in synchronism with the output signal of the oscillator circuit and for applying the pulse width varied gate signal to the chopper. In this way the chopper frequency is decreased to improve the operating efficiency during light-load operation.

摘要翻译： 一种用于从DC电源向负载供电的电力转换装置，包括连接到DC电源的斩波器; 连接到所述斩波器的DC输出的逆变器，用于向所述负载提供转换的AC电力; 误差放大器，用于检测功率转换器装置的输出电压并控制输出电压，以保持输出电压等于预定参考值; 以及用于产生用于斩波器的栅极信号的电压控制电路，包括用于产生具有根据误差放大器的输出信号而变化的频率的可变频率信号的振荡器电路，以及用于产生具有 脉冲宽度与振荡器电路的输出信号同步变化，并将脉冲宽度变化的门信号施加到斩波器。 以这种方式降低了斩波频率，从而提高了轻载操作时的工作效率。

公开(公告)号：US4329652A

公开(公告)日：1982-05-11

申请号：US15638

申请日：1979-02-27

申请人： Osamu Higa ,  Nagataka Seki

发明人： Osamu Higa ,  Nagataka Seki

IPC分类号： H02M7/48 ,  H02M7/493 ,  H02M7/505 ,  H03K5/15 ,  H03K17/00

CPC分类号： H02M7/493 ,  H02M7/505 ,  H03K17/00 ,  H03K5/15093

摘要： In controlled apparatus in which the output pulses of a common reference oscillator are the reference signals of a plurality of inverters, a synchronizing signal generated once in each cycle is added to the output pulses of the common reference oscillator. A respective control apparatus provided for each inverter detects the synchronizing signal from these output pulses to which the synchronizing signal has been added, and by this means phase matching of the outputs of the inverters is effected.

摘要翻译： 在公共参考振荡器的输出脉冲是多个反相器的参考信号的受控装置中，在每个周期中产生一次的同步信号被加到公共参考振荡器的输出脉冲上。 为每个逆变器提供的各个控制装置从相加了同步信号的这些输出脉冲检测同步信号，从而实现逆变器的输出的相位匹配。

公开(公告)号：US5371664A

公开(公告)日：1994-12-06

申请号：US971157

申请日：1992-11-04

申请人： Nagataka Seki

发明人： Nagataka Seki

IPC分类号： H02J3/01 ,  H02J3/18 ,  H02M1/12 ,  H02M7/162 ,  H02M7/48 ,  H02M7/757 ,  H02H7/12

CPC分类号： H02M7/757 ,  H02J3/01 ,  H02J3/1842 ,  H02M1/12 ,  H02M7/162 ,  H02M7/48 ,  Y02E40/22 ,  Y02E40/40

摘要： The power conversion system of this invention comprises line-commutated power converting means in which a line-commutated power conversion circuit that performs line-commutated commutation and a coupling diode are coupled to form a DC circuit and for converting DC power into AC power or AC power into DC power. Further, the system comprises self-commutated power converting means, in which a self-commutated power conversion circuit is coupled to the coupling diode in order to form a DC circuit and for reducing reactive power, or the reactive power and harmonics generated by the line-commutated converting means. Accordingly, their respective strengths can be made use of and their mutual weaknesses can complement each other.

摘要翻译： 本发明的电力变换系统包括线路换向功率转换装置，其中进行线路换向换向的线路整流功率转换电路和耦合二极管耦合以形成DC电路并将DC电力转换成AC电力或AC 电源进入直流电源。 此外，该系统包括自换向功率转换装置，其中自换向功率转换电路耦合到耦合二极管，以便形成DC电路并且用于降低无功功率，或由线路产生的无功功率和谐波 通用转换手段。 因此，他们各自的优势可以利用，它们的相互的弱点可以相辅相成。

公开(公告)号：US5355298A

公开(公告)日：1994-10-11

申请号：US99326

申请日：1993-07-30

申请人： Nagataka Seki

发明人： Nagataka Seki

IPC分类号： H02M1/16 ,  G05F1/573 ,  H02H7/122 ,  H02M7/48 ,  H02M7/515 ,  H02M7/537

CPC分类号： H02H7/1225 ,  G05F1/573 ,  H02M7/48

摘要： A conversion apparatus including a plurality of high-speed switching devices, each being operable in latch type operation and non-latch type operation and a power source for supplying a first current to the high-speed switching devices, thereby forming a current path of the high-speed switching devices. The high-speed switching device is turned off after changeover from the latch type operation to the non-latch type operation. The conversion apparatus further includes a current regulation circuit provided in the current path for regulating a second current flowing through the current regulation circuit after the second current has reached a prescribed value. In case of overcurrent malfunction, the high-speed switching device is changed from the latch type operation to the non-latch type operation, and then is caused to be turned off while the current regulation circuit regulates the second current.

摘要翻译： 一种包括多个高速开关装置的转换装置，每个高速开关装置均可在闩锁型操作和非闩锁型操作中操作，以及用于向高速开关装置提供第一电流的电源，从而形成电流路径 高速交换设备。 在从锁存型操作切换到非闩锁型操作之后，高速开关装置被关闭。 转换装置还包括电流调节电路，其设置在电流路径中，用于在第二电流达到规定值之后调节流过电流调节电路的第二电流。 在过电流故障的情况下，高速开关器件从锁存器类型操作变为非锁存型操作，然后在电流调节电路调节第二电流时被关断。

公开(公告)号：US4675800A

公开(公告)日：1987-06-23

申请号：US664384

申请日：1984-10-24

申请人： Nagataka Seki ,  Kosaku Ichikawa

发明人： Nagataka Seki ,  Kosaku Ichikawa

IPC分类号： H02H7/12 ,  H02M1/06 ,  H02M1/08 ,  H02M1/088 ,  H02H7/10

CPC分类号： H02M1/088

摘要： A power converter including a plurality of serially connected self-turn-off semiconductor elements, including a first control circuit for producing a plurality of control signals, and a plurality of second control circuits is connected to receive respective of the control signals to supply a non-conduction control signal to a respective of the self-turn-off semiconductor elements to turn off the respective semiconductor element. The power converter further includes a plurality of failure detectors and blocking circuits. Each of the failure detectors is connected to a respective of the self-turn-off semiconductor elements for detecting a fault thereof to produce a fault detection signal when the respective self-turn-off semiconductor elements has failed. Each of the blocking circuits is connected to the respective failure detector and to the first control circuit for blocking either the respective control signal or the respective non-conduction control signal based on the respective fault detection signal.

摘要翻译： 包括多个串联连接的自关断半导体元件的功率转换器，包括用于产生多个控制信号的第一控制电路和多个第二控制电路，以接收各自的控制信号， - 导通控制信号发送到相关的自关断半导体元件以关闭相应的半导体元件。 功率转换器还包括多个故障检测器和阻塞电路。 每个故障检测器连接到各自的自关断半导体元件，用于检测其故障，以在相应的自关断半导体元件发生故障时产生故障检测信号。 每个阻塞电路连接到相应的故障检测器和第一控制电路，用于基于相应的故障检测信号来阻止相应的控制信号或相应的非导通控制信号。

公开(公告)号：US4568837A

公开(公告)日：1986-02-04

申请号：US557542

申请日：1983-12-02

申请人： Nagataka Seki

发明人： Nagataka Seki

IPC分类号： H02M1/06 ,  H03K17/723 ,  H03K17/72 ,  H03K17/08

CPC分类号： H02M1/06 ,  H03K17/723

摘要： A gate circuit for turning off a gate turn-off thyristor providing a signal of rapid voltage rise and high peak value followed by successive signals of low peak value. The circuit uses a pulse transformer, whose primary winding is divided at least into three windings, which is associated with three winding capacitors which are respectively connected with the connection points of the divided primary windings.

摘要翻译： 用于关闭提供快速电压上升和高峰值的信号的栅极截止晶闸管的栅极电路，随后是低峰值的连续信号。 电路使用脉冲变压器，其初级绕组至少分为三个绕组，其与分别与分开的初级绕组的连接点连接的三个绕组电容器相关联。

公开(公告)号：US4922124A

公开(公告)日：1990-05-01

申请号：US291160

申请日：1988-12-28

申请人： Nagataka Seki ,  Shunich Hirose

发明人： Nagataka Seki ,  Shunich Hirose

IPC分类号： H02H9/04 ,  H02J3/38 ,  H02M7/48

CPC分类号： H02M7/49 ,  Y10T307/735

摘要： A power converter device including a plurality of self-commutated voltage type converter each connected to a common d.c. circuit, a plurality of transformers each having d.c. windings and a.c. windings, each of the d.c. windings being connected to an a.c. output terminal of a respective one of the converters and each of the a.c. windings being connected in series, an a.c. switch through which the serially connected a.c. windings of the transformers are adapted to be connected to a utility power system, and a d.c. overvoltage suppression device, installed in the common d.c. circuit, wherein the transformers are connected to the utility power system by synchronous making, and the d.c. overvoltage suppression device is connected to the common d.c. circuit when the converters are stopped temporarily.

公开(公告)号：US4890213A

公开(公告)日：1989-12-26

申请号：US279277

申请日：1988-12-02

申请人： Nagataka Seki

发明人： Nagataka Seki

IPC分类号： H02M1/16 ,  H02M7/497

CPC分类号： H02M7/48 ,  H02M7/515 ,  Y10T307/707 ,  Y10T307/724

摘要： A power converter device including a plurality of self-commutated voltage type converters each connected to a common dc circuit, a plurality of transformers each having dc windings and ac windings, each of the dc windings being connected to an ac output terminal of a respective one of the converters and each of the ac windings connected in series, an ac switch through which the serially connected ac windings of the transformers are connected to utility power systems, a capacitor provided in the common dc circuit, a dc overvoltage suppression means installed in the common dc circuit, and a current limiting device, wherein the capacitor in the common dc circuit is charged through the current limiting device means before starting the self-commutated voltage type converters, and the dc overvoltage suppression means is then connected to the common dc circuit and removed after the self-commutated voltage type converters are started.