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91. 发明专利

JPH11299245A CONTROL METHOD OF CONVERTER 失效
公开(公告)号：JPH11299245A
公开(公告)日：1999-10-29
申请号：JP10434598
申请日：1998-04-15
申请人： HITACHI LTD
发明人： OKUZAWA KATSUHIRO , TOKUNAGA KIICHI , BANDO AKIRA
IPC分类号： H02M7/219 , H02M7/12 , H02M7/797
摘要： PROBLEM TO BE SOLVED: To reduce the losses caused by a switching element with its stable operation, by keeping constant the ratio of a modulating wave to a carrier, controlling the power factor at 1, and performing constant-DC-voltage control. SOLUTION: The control portion of this converter has a dead-time adjusting circuit 21 as well as a PWM control signal generator 12 and a PLL control circuit 10 including a power factor detector 9. One arm, which is connected to a phase with the minimum and maximum absolute value of a three-phase AC voltage, controls a switching element in PWM to suppress higher-harmonic currents. Also, the other two phases are commutated continuously to give to this converter a DC voltage characteristic similar to the diode-bridge converter. Then, when the DC voltage is increased, the PLL control circuit 10 detects a power-factor angle from the power supply voltage and AC current and adjusts the value of the power factor to 1. On the other hand, the dead-time adjusting circuit 21 adjusts the value of a Y-axis component from the input AC current and the power-factor angle of the power factor sensor 9 to make the vaue zero. Thereby, stable operation is maintained and the losses of the switching element can be reduced.

92. 发明专利

JPH11215849A PULSE WIDTH MODULATED POWER CONVERTER 失效
公开(公告)号：JPH11215849A
公开(公告)日：1999-08-06
申请号：JP1586898
申请日：1998-01-28
申请人： HITACHI LTD
发明人： BANDO AKIRA , TOKUNAGA KIICHI , OKUZAWA KATSUHIRO
IPC分类号： H02M7/797 , H02P27/08 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To provide a PWM(pulse width modulated) power converter operable continuously when power supply or a load varies, and operable with a sufficiently higher efficiency as well by reducing losses to be generated by switching elements. SOLUTION: A control command signal CTR outputted from a load condition detecting circuit 28 is supplied to a logic circuit 24, and supply of firing commands 12a-12f to switching elements 2a-2f is prevented, when the magnitude of a DC current between a converter section 2 and an inverter section 4 is less than a specified value. Here, the switching elements 2a-2f are PWM- controlled, only when it is the specified value or more.

93. 发明专利

JPH11178217A SYSTEM AND METHOD FOR SYNCHRONIZING CONTROLLERS OF MULTIPLE SYSTEMS 失效
公开(公告)号：JPH11178217A
公开(公告)日：1999-07-02
申请号：JP33595397
申请日：1997-12-05
申请人： HITACHI LTD
发明人： MORITA YUICHIRO , SHIMAMURA KOTARO , TAKAHASHI NOBUTAKA , HOTTA TAKASHI , IMAIE KAZUHIRO , UEDA SHIGETA , BANDO AKIRA , KIDO MITSUYASU
IPC分类号： H04L1/08 , G05B9/03 , G05F1/00 , G06F11/00 , G06F11/07 , G06F11/16 , G06F11/18 , G06F15/16 , G06F15/177 , H02J3/38 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To enable a system for synchronizing the controllers of multiple system, in which a plurality of systems are operated concurrently in a fixed control period to be operated by one system, even when faults occurs in the plurality of systems. SOLUTION: A synchronous circuit 10a of each system of a system in which controllers provided with the synchronous circuits 10a are multiplexed corrects the control period of its own system, by discriminating the out-of-synchronism of the period signal of its own system from a synchronization reference signal by outputting a period signal which indicates the starting point of a control period from a period signal generating circuit 100 and a synchronization reference signal from a synchronization reference selecting circuit 104 by referring to the period signals of its own system and the other systems. When the synchronization reference signal is not outputted, the synchronous circuit 10a performs such period correction that does not correct the control period of its own system by means of a control period correction circuit 101.

94. 发明专利

JPH10271834A MULTIPLEX CONTROLLER AND METHOD FOR RESTORING IT FROM FAULTY STATE 失效
公开(公告)号：JPH10271834A
公开(公告)日：1998-10-09
申请号：JP6673197
申请日：1997-03-19
申请人： HITACHI LTD , TOKYO ELECTRIC POWER CO
发明人： SHIMAMURA KOTARO , MORITA YUICHIRO , TAKAHASHI NOBUTAKA , HOTTA TAKASHI , SATO HIROYASU , UEDA SHIGETA , BANDO AKIRA , SUZUKI HIROKAZU , SAKAMOTO KOJI
IPC分类号： G05B9/03 , G06F11/18 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To enable an equipment controller to return a faulty system to a normal state without stopping equipment even when the controller performs processing in a short computing period, by transferring a plurality of blocks to the faulty system from a normal system over a plurality of computing periods in the order of dependence from the highest order. SOLUTION: When an arithmetic module 131 detects a fault in a computing period (k+1), the module 131 resets a CPU 32O and starts initralization of the control constants of registers in a RAM 316, a memory 412, and a control circuit and initialization of the other elements and the control circuit 414. During the initialization, the module 131 first checks its own hardware for faults in accordance with its own diagnostic program and whether or not a similar fault is detected during a fixed period of time in the past. When a hardware fault is detected or when it is discriminated that an unfixable fault is detected, the module 131 stops the initialization by discriminating that the fault is unfixable. When the cause of the fault is not able to be found, the initialization of such hardware as the register, etc., is started.

95. 发明专利

JPS62291476A VARIABLE SPEED TYPE PUMP SYSTEM 失效
公开(公告)号：JPS62291476A
公开(公告)日：1987-12-18
申请号：JP9984986
申请日：1986-04-30
申请人： HITACHI LTD
发明人： KUWABARA HISAO , BANDO AKIRA , HAYASHI SHIGEAKI , YOKOYAMA ISAO , ONO YASUTERU
IPC分类号： F03B15/04
摘要： PURPOSE:To assure a sure pumping start-up by computing an optimum rotation speed command and an optimum guide vane opening command by preliminarily setting the actual rotation speed at a high level upon start-up, and then by controlling the actual rotation speed to decrease to the optimum rotation speed. CONSTITUTION:When a motor output command POE is given, an optimum rotation speed NOPT is output from an optimum rotation speed function generator 30 according to the command POE and a pump head H. The deflection between the optimum rotation speed NOPT and an actual rotation speed N is then calculated by an adding unit 31. The signal of the deflection is output to a guide vane compensation signal circuit 32. An optimum guide vane opening signal YOPT is output from an opening guide vane opening function generator 33 with the command POE and the pump head H as the inputs. The signal synthesized by the signal YOPT and a guide vane compensation signal DELTAYN are given to a hydraulic servo mechanism 14 from the adding unit 34 to control the opening of the guide vane. The actual rotation speed is controlled such that it is once increased before the actual pumping operation beings and, upon start-up, is converged thereafter on the optimum rotation speed.

96. 发明专利

JP2014104962A Device and system for controlling electric railway feeder 有权
标题翻译：用于控制电力铁路馈线的装置和系统
公开(公告)号：JP2014104962A
公开(公告)日：2014-06-09
申请号：JP2012262067
申请日：2012-11-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAKATSUKA YASUHIRO , IMAZU YASUHIRO , SAKUCHI OSAMU , ICHINOSE MASAYA , KIYOFUJI YASUHIRO , BANDO AKIRA , NARUSHIMA JUN
IPC分类号： B60M3/04 , H02J3/46
CPC分类号： B60M3/02 , B60M3/06 , H02J3/28 , H02J3/46
摘要： PROBLEM TO BE SOLVED: To extend a feeder section that serves as a target of interchange for improving effect of power interchange between the feeders.SOLUTION: A device for controlling an electric railway feeder is connected to a first feeder connected to the load side of the transformer of a first railway substation containing the transformer for receiving power from a power system and a second feeder connected to the load side of the transformer of a second railway substation containing the transformer for receiving power from the power system, and determines the interchange amount of electric energy between the first and the second feeders. The interchange amount of electric energy between the first and second feeders is determined by using the received power of the first railway substation and the electric power of the first feeder, as well as the received power of the second railway substation and the electric power of the second feeder.
摘要翻译：要解决的问题：扩展作为交换对象的馈电部分，以提高馈线之间电力交换的效果。解决方案：一种用于控制电气铁路馈线的装置连接到连接到包含用于从电力系统接收电力的变压器的第一铁路变电站的变压器和连接到包含用于从电力系统接收电力的变压器的第二铁路变电站的变压器的负载侧的第二馈电线，并且确定第一和第二馈电线之间的电能。通过使用第一铁路变电站的接收功率和第一馈线的电力以及第二铁路变电站的接收功率和第二铁路变电所的电力来确定第一和第二馈电装置之间的电能的交换量第二馈线

97. 发明专利

JP2014073017A Failure detection device and failure detection method 有权
标题翻译：故障检测装置和故障检测方法
公开(公告)号：JP2014073017A
公开(公告)日：2014-04-21
申请号：JP2012218346
申请日：2012-09-28
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OIRI AKIRA , BANDO AKIRA , MORITA AKIHIRO , OGURA MAKOTO , HIGUCHI MIKIMASA
IPC分类号： H02M1/00 , H02M7/12
摘要： PROBLEM TO BE SOLVED: To provide a failure detection device and a failure detection method for a power conversion system capable of detecting an anomaly of a voltage detector and failure of an element while distinguishing them.SOLUTION: A failure detection device includes a forward voltage detector 21 for detecting a forward voltage across an anode and a cathode of a thyristor 11, a reverse voltage detector 31 for detecting a reverse voltage across the anode and the cathode of the thyristor 11, and a failure detection part 172 for executing failure detection processing which includes determination of element failure of the thyristor 11, to which the forward voltage detector 21 and the reverse voltage detector 31 are connected in parallel, failure of the forward voltage detector 11, and failure of the reverse voltage detector 31, based on a forward voltage detection signal inputted from the forward voltage detector 21 and a reverse voltage detection signal inputted from the reverse voltage detector 31.
摘要翻译：要解决的问题：提供一种能够检测电压检测器的异常并且识别元件故障的电力变换系统的故障检测装置和故障检测方法。解决方案：故障检测装置包括正向电压检测器 21，用于检测跨越晶闸管11的阳极和阴极的正向电压;用于检测晶闸管11的阳极和阴极两端的反向电压的反向电压检测器31;以及用于执行故障检测处理的故障检测部172，包括基于正向电压确定正向电压检测器21和反向电压检测器31并联连接的晶闸管11的元件故障，正向电压检测器11的故障和反向电压检测器31的故障从正向电压检测器21输入的检测信号和从反向电压输入的反向电压检测信号年龄检测器31。

98. 发明专利

JP2014018015A Control device and control method of voltage type power conversion apparatus 有权
标题翻译：电压型转换装置的控制装置及控制方法
公开(公告)号：JP2014018015A
公开(公告)日：2014-01-30
申请号：JP2012155209
申请日：2012-07-11
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YAMAMOTO TAKAYOSHI , ICHINOSE MASAYA , BANDO AKIRA , INOUE SHIGENORI , YOSHIHARA TORU
IPC分类号： H02M7/497 , H02M7/48
CPC分类号： H02M5/44 , H02M7/483 , H02M2007/4835
摘要： PROBLEM TO BE SOLVED: To provide a control device and a control method of a voltage type power conversion apparatus, capable of improving the problem of variation among capacitors in a configuration simpler than the conventional ones.SOLUTION: The control device of a voltage type power conversion apparatus is configured in which an arm is formed by being provided with a plurality of unit converters each equipped with a capacitor, a leg is configured by serially connecting a first arm and a second arm, an AC terminal is connected to a connection part of the first arm and the second arm, a plurality of legs are provided in which the other terminal of the first arm is made to be a first DC terminal, the other terminal of the second arm is made to be the second DC terminal, the first terminal is made to be on a positive side, and the second terminal is made to be on a negative side, and a pulse is produced for operating the unit converter to operate the unit converter. A frequency of a command pulse is a non-integer multiple of a frequency of a system voltage. A non-integer multiple is 3.5 times, for instance.
摘要翻译：要解决的问题：提供一种电压型电力转换装置的控制装置和控制方法，其能够在比以往更简单的结构中改善电容器之间的变化问题。解决方案：电压型电源的控制装置转换装置被配置为通过设置有多个单元转换器来形成臂，每个单元转换器均装有电容器，通过串联连接第一臂和第二臂而构成一个脚，AC端连接到第一臂和第二臂设置有多个腿，第一臂的另一个端子被构成为第一直流端子，第二臂的另一个端子被制成第二直流端子，第一臂使端子成为正极侧，使第二端子成为负极，产生用于使单元变换器动作以使单元变换器动作的脉冲。指令脉冲的频率是系统电压频率的非整数倍。例如，非整数倍是3.5倍。

99. 发明专利

JP2013244799A Power storage type regenerated power absorber and its controlling method 有权
标题翻译：电力储能型再生能量吸收器及其控制方法
公开(公告)号：JP2013244799A
公开(公告)日：2013-12-09
申请号：JP2012118887
申请日：2012-05-24
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ITO TOMOMICHI , BANDO AKIRA , ITO NAOTO , MAOKA AKIHIRO
IPC分类号： B60M3/06
摘要： PROBLEM TO BE SOLVED: To prevent the occurrence of unnecessary loss of DC/DC power converter, by stabilizing a power feeder voltage, preventing overcharge and overdischarge on/from a storage battery, and preventing control hunting.SOLUTION: A power storage type regenerated power absorber including: a power converter connected between a feeder line and a rail in a direct current feeder section; and a power storage element connected to the power converter, controls a gate signal which is given to the power converter by a voltage control mode for controlling power feeder voltage in a first range by charging/discharging of the power storage element, and a charging rate control mode for controlling a charging rate so as to be close to a second range when the power feeder voltage is in the first range, and the charging rate of the power storage element is outside of the second range. It includes a suppression mode which turns off the gate signal given to the power converter, in a changing stage from the voltage control mode to the charge rate control mode.
摘要翻译：要解决的问题：为了防止DC / DC电力转换器的不必要的损失的发生，通过稳定供电电压，防止蓄电池过充电和过放电，并防止控制狩猎。解决方案：蓄电式再生电源吸收器包括：在直流馈电部分中连接在馈电线路和轨道之间的功率转换器; 以及与功率转换器连接的蓄电元件，通过用于通过蓄电元件的充电/放电来控制第一范围内的馈电电压的电压控制模式来控制向功率转换器供给的栅极信号，以及充电率控制模式，用于当供电电压处于第一范围时控制充电速率以接近第二范围，并且蓄电元件的充电率在第二范围之外。它包括在从电压控制模式到充电速率控制模式的变化阶段中关闭给予功率转换器的门信号的抑制模式。

100. 发明专利

JP2013162735A Current controller of voltage type power converter and current control method of voltage type power converter 有权
标题翻译：电压型电源转换器的电流控制器和电压型电源转换器的电流控制方法
公开(公告)号：JP2013162735A
公开(公告)日：2013-08-19
申请号：JP2012025679
申请日：2012-02-09
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YAMAMOTO TAKAYOSHI , ICHINOSE MASAYA , BANDO AKIRA , YAMASHITA KEIICHI , SAKUCHI OSAMU , INOUE SHIGENORI , KATO SHUJI , YOSHIHARA TORU , ITO TOMOMICHI
IPC分类号： H02M7/12 , H02M7/219
摘要： PROBLEM TO BE SOLVED: To lower the power converter capacity by lowering the peak value of a current flowing to each leg, with a simple configuration when compared with prior art.SOLUTION: Current of a power converter is controlled so that desired power conversion is carried out between an AC system and a DC system, by performing feedback control so that a first predetermined value is obtained by performing coordinate transformation of an AC current flowing to an AC terminal with the phase of the system voltage, and performing feedback control so that a second predetermined value is obtained by performing coordinate transformation of a circulating current flowing through a first arm and a second arm with the phase of a second frequency different from the phase of the system voltage.
摘要翻译：要解决的问题：与现有技术相比，通过降低流向每条支路的电流的峰值来降低功率转换器容量。解决方案：控制功率转换器的电流，从而承载所需的功率转换在AC系统和DC系统之间通过执行反馈控制使得通过以系统电压的相位执行流向AC端子的AC电流的坐标变换来获得第一预定值，并且执行反馈控制，使得通过以与系统电压的相位不同的第二频率的相位执行流过第一臂和第二臂的循环电流的坐标变换来获得第二预定值。

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