专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

EP2706650A2 Power conversion system 有权
标题翻译： Leistungswandlungssystem
公开(公告)号：EP2706650A2
公开(公告)日：2014-03-12
申请号：EP13180981.6
申请日：2013-08-20
申请人： Hitachi Ltd. , Hitachi Mito Engineering Co., Ltd.
发明人： Kojima, Tetsuo , Shinomiya, Takeshi , Sugiura, Tetsu
IPC分类号： H02M3/158
CPC分类号： H02M3/1584 , H02M7/493
摘要： In a power conversion system in which a plurality of power conversion devices for supplying AC power are operated in parallel, the balancing of the electric current loads on the power conversion devices is achieved without the need of using information communication means among the power conversion devices. Stable parallel operation of the power conversion devices is realized by suppressing the DC component of the zero-phase current flowing among the power conversion devices. To achieve the object, a power conversion system in accordance with the present invention comprises: a first power conversion device; a second power conversion device having the same configuration as the first power conversion device and being connected in parallel with the first power conversion device; and an electricity receiving part which receives AC power from at least one of the first and second power conversion devices. The first power conversion device includes: a DC voltage supply whose intermediate point is grounded; a power converter which converts DC power outputted by the DC voltage supply into AC power; and a controller which controls the power converter based on output voltage of the DC voltage supply and output current of the power converter.
摘要翻译：在并联运行用于提供交流电力的多个电力转换装置的电力转换系统中，在电力转换装置中不需要使用信息通信装置的情况下，实现电力转换装置上的电流负载的平衡。通过抑制在电力转换装置之间流动的零相电流的直流分量来实现功率转换装置的稳定的并联运行。为了实现该目的，根据本发明的电力转换系统包括：第一电力转换装置; 第二电力转换装置，其具有与第一电力转换装置相同的配置并与第一电力转换装置并联连接; 以及从所述第一和第二电力转换装置中的至少一个接收AC电力的电力接收部。第一电力转换装置包括：中间点接地的直流电压源; 电力转换器，其将由直流电压源输出的直流电力转换成交流电; 以及基于功率转换器的直流电压供给和输出电流的输出电压来控制功率转换器的控制器。

2. 发明公开

EP2528218A2 DC power supply 失效
标题翻译：直流电源
公开(公告)号：EP2528218A2
公开(公告)日：2012-11-28
申请号：EP12169273.5
申请日：2012-05-24
申请人： Hitachi Ltd. , Hitachi Mito Engineering Co., Ltd.
发明人： Kojima, Tetsuo , Nozaki, Yuichiro , Makino, Masafumi , Shinomiya, Takeshi , Sugiura, Tetsu
IPC分类号： H02M3/335
CPC分类号： H02M3/33576 , Y02B70/1433
摘要： A DC power supply including a resonant circuit on a secondary side of a transformer suppresses a surge voltage during power recovery of diodes constituting a rectifier circuit, correctly estimates a load current from a secondary current of the transformer, and adjusts supplied power when a load is light.
The DC power supply includes a DC voltage source, a converter, a transformer, a rectifier circuit, a resonant circuit composed of a resonant switch 106 and a resonant capacitor 107, a filter reactor, a filter capacitor, a snubber diode 110, a snubber capacitor 109, and a load. The DC power supply further includes first and second voltage sensors 101 and 111, a current sensor 104, and a controller 114 for inputting output signals of these sensors and outputting a signal for controlling gate pulses of semiconductor devices constituting a converter 102 and the resonant switch 106 and a signal for adjusting operation timings of A/D converters 200 to 203 converting the signals of these sensors.
摘要翻译：包括变压器的次级侧上的谐振电路的DC电源抑制构成整流器电路的二极管的功率恢复期间的浪涌电压，正确地估计来自变压器的次级电流的负载电流，并且当负载光。 DC电源包括DC电压源，转换器，变压器，整流器电路，由谐振开关106和谐振电容器107组成的谐振电路，滤波电抗器，滤波电容器，缓冲二极管110，缓冲器电容器109和负载。 DC电源还包括第一和第二电压传感器101和111，电流传感器104和控制器114，用于输入这些传感器的输出信号并输出用于控制构成转换器102的半导体器件的栅极脉冲的信号，并且谐振开关 106和用于调整转换这些传感器的信号的A / D转换器200至203的操作定时的信号。

3. 发明公开

EP2528218A3 DC power supply 失效
标题翻译：直流电源
公开(公告)号：EP2528218A3
公开(公告)日：2015-09-09
申请号：EP12169273.5
申请日：2012-05-24
申请人： Hitachi, Ltd. , Hitachi Mito Engineering Co., Ltd.
发明人： Kojima, Tetsuo , Nozaki, Yuichiro , Makino, Masafumi , Shinomiya, Takeshi , Sugiura, Tetsu
IPC分类号： H02M3/335
CPC分类号： H02M3/33576 , Y02B70/1433
摘要： A DC power supply including a resonant circuit on a secondary side of a transformer suppresses a surge voltage during power recovery of diodes constituting a rectifier circuit, correctly estimates a load current from a secondary current of the transformer, and adjusts supplied power when a load is light.
The DC power supply includes a DC voltage source, a converter, a transformer, a rectifier circuit, a resonant circuit composed of a resonant switch 106 and a resonant capacitor 107, a filter reactor, a filter capacitor, a snubber diode 110, a snubber capacitor 109, and a load. The DC power supply further includes first and second voltage sensors 101 and 111, a current sensor 104, and a controller 114 for inputting output signals of these sensors and outputting a signal for controlling gate pulses of semiconductor devices constituting a converter 102 and the resonant switch 106 and a signal for adjusting operation timings of A/D converters 200 to 203 converting the signals of these sensors.

4. 发明公开

EP2779401A2 DC Power Supply 有权
标题翻译：直流电源
公开(公告)号：EP2779401A2
公开(公告)日：2014-09-17
申请号：EP14152806.7
申请日：2014-01-28
申请人： Hitachi, Ltd. , Hitachi Mito Engineering Co., Ltd.
发明人： Kojima, Tetsuo , Shinomiya, Takeshi , Kawamoto, Takehiro , Muraoka, Kazufumi , Sugiura, Tetsu
IPC分类号： H02M3/335 , H02M1/08
CPC分类号： H02M1/08 , H02M3/335
摘要： Disclosed is a DC-DC converter using an insulating transformer, the converter including means that reduces/mitigates electromagnetic noise due to voltage/current harmonics, without magnetically saturating the insulating transformer.
In order to realize the above, a DC power supply of this invention is constructed so that a pulse turn-on duration in an output voltage waveform of a DC-AC power conversion circuit is controlled to a value corresponding to a DC voltage of a DC voltage source, and so that a switching period in the output voltage waveform of the DC-AC power conversion circuit changes in accordance with a predetermined time-series signal.

5. 发明公开

EP2230123A3 Railway system including power feeding equipment installed on railway track between stations 审中-公开
标题翻译：轨道系统具有供给站的通电接触线沿一距离
公开(公告)号：EP2230123A3
公开(公告)日：2014-04-02
申请号：EP10250174.9
申请日：2010-02-02
申请人： Hitachi, Ltd.
发明人： Shinomiya, Takeshi , Toyota, Eiichi , Shimada, Motomi
IPC分类号： B60L9/00 , B60L11/18
CPC分类号： B60L9/00 , B60L11/1801 , B60L11/1809 , B60L2200/26 , B60L2210/20 , Y02T10/7005 , Y02T10/7072 , Y02T10/725 , Y02T90/127 , Y02T90/14
摘要： There is provided a railway system enabling a railcar including an onboard power storage to run to a nearest station with the minimum capacity of the onboard power storage. The power storage is installed on the railcar and inter-station power feeding equipment is provided. The inter-station power feeding equipment is a power supply facility using a contact line or charging post fed with power from a power supply system different from the power supply system of a contact line near a station. The distance between the station and the inter-station power feeding equipment or the distance between the inter-station power feeding equipment and the inter-station power feeding equipment is within an operating range over which the train can run with the maximum state of charge of the power storage. The onboard power storage can be charged at a location where the inter-station power feeding equipment is provided. Thus, the railway system can reduce the capacity requirements of the onboard power storage and enables the railcar to run to the nearest station.

6. 发明公开

EP2464004A2 Rotator control device, rotator system, vehicle, electric car and electric generation system 审中-公开
标题翻译： Rotorsteuerungsvorrichtung，Rotorsystem，Fahrzeug，Elektroauto und Stromerzeugungssystem
公开(公告)号：EP2464004A2
公开(公告)日：2012-06-13
申请号：EP11193105.1
申请日：2011-12-12
申请人： Hitachi Ltd.
发明人： Iwaji, Yoshitaka , Kaneko, Daigo , Mochizuki, Kento , Shinomiya, Takeshi , Kori, Daisuke , Masuda, Seikichi
IPC分类号： H02P29/02
CPC分类号： H02P29/02
摘要： To prevent demagnetization of a permanent magnet synchronous rotating machine, a rotating machine control device according to the present invention is a rotating machine (5) control device comprising: a power converter having a switch part (Sup to Swn) on each of a positive side and a negative side for each phase; and short circuit detection unit (36) for detecting a short circuit of the switch part (Sup to Swn), wherein a command to turn on positive-side switches and negative-side switches of a plurality of phases of the switch part (Sup to Swn) is issued in the case where the short circuit detection unit (36) detects the short circuit.
摘要翻译：为了防止永磁同步旋转电机的退磁，根据本发明的旋转机械控制装置是旋转电机（5）控制装置，包括：功率转换器，其具有在正侧的每一个上的开关部分（Sup至Swn）每相的负面; 以及用于检测开关部分（Sup至Swn）的短路的短路检测单元（36），其中将开关部分的多相的正侧开关和负侧开关的指令（Sup至在短路检测单元（36）检测到短路的情况下，发出Swn。

7. 发明公开

EP2368744A2 Traction system for trainset 审中-公开
标题翻译： AntriebfürTriebzug
公开(公告)号：EP2368744A2
公开(公告)日：2011-09-28
申请号：EP11250185.3
申请日：2011-02-17
申请人： Hitachi, Ltd.
发明人： Shimada, Motomi , Kaneko, Takashi , Mochizuki, Kento , Nakamura, Takayoshi , Shinomiya, Takeshi
IPC分类号： B60L1/00 , B60L9/00 , B60L15/20
CPC分类号： B60L15/2045 , B60L9/00 , B60L2200/26 , Y02T10/7283
摘要： The invention provides a traction system for a trainset, especially equipped with a plurality of power feeding means and having a function for effectively selecting a traction system as destination of supply of power obtained from these means in order to enhance the redundancy of the traction system of the train. The trainset comprises a plurality of power generating means, wherein the plurality of power generating means are connected via a plurality of power feeding means. The trainset further comprises a first selector for outputting power to any one of the plurality of power feeding means or a number of arbitrary power feeding means. An inverter means constituting the traction system further comprises a second selector capable of arbitrarily selecting a power system for receiving the power from the plurality of power feeding means. Similarly, an auxiliary power supply means constituting the traction system comprises a third selector capable of arbitrarily selecting a power system for receiving the power from the plurality of power feeding means.
摘要翻译：本发明提供了一种用于火车的牵引系统，特别是配备有多个供电装置，并且具有用于有效地选择牵引系统作为从这些装置获得的动力的供给的目的地的功能，以便增强牵引系统的冗余度火车。火车组包括多个发电装置，其中多个发电装置经由多个供电装置连接。所述列车还包括用于向所述多个供电装置中的任何一个供电装置或多个任意供电装置输出动力的第一选择器。构成牵引系统的逆变器装置还包括第二选择器，其能够任意地选择用于从多个供电装置接收电力的电力系统。类似地，构成牵引系统的辅助电源装置包括能够任意地选择用于从多个供电装置接收电力的电力系统的第三选择器。

8. 发明公开

EP2747261A3 Power conversion equipment 有权
标题翻译：电力转换设备
公开(公告)号：EP2747261A3
公开(公告)日：2018-03-21
申请号：EP13196329.0
申请日：2013-12-09
申请人： Hitachi, Ltd. , Hitachi Mito Engineering Co., Ltd.
发明人： Sugiura, Tetsu , Kojima, Tetsuo , Shinomiya, Takeshi , Kawamoto, Takehiro , Muraoka, Kazufumi
IPC分类号： H02M1/12 , H02M1/15 , H02M1/00
摘要： The present invention aims at solving the prior art problem of not being able to suppress electrical vibration effectively due to insufficient control response against input voltage fluctuation in a damping control for suppressing electrical vibration that occurs to an input-side LC filter of a DC-DC converter. The power conversion equipment according to the present invention comprises, as a controller of a DC-DC converter, a subtractor for detecting a first filter capacitor voltage and a DC power supply voltage and subtracting the DC power supply voltage from the filter capacitor voltage, and a high-pass filter for cutting off a DC component from the result of calculation of the subtractor and shifting the phase of an AC component to output a damping control quantity, wherein the damping control quantity is added to a voltage command of the DC-DC converter to suppress the electrical vibration that occurs to an input-side LC filter of the DC-DC converter.
摘要翻译：本发明的目的在于解决现有技术中由于在用于抑制DC-DC的输入侧LC滤波器中发生的电振动的减振控制中对输入电压波动的控制响应不足而无法有效抑制电振动的问题转换器。根据本发明的功率转换设备包括作为DC-DC转换器的控制器的减法器，用于检测第一滤波电容器电压和DC电源电压，并从滤波电容器电压中减去DC电源电压，以及高通滤波器，用于从减法器的计算结果中切除DC分量，并且将AC分量的相位偏移以输出减振控制量，其中减振控制量被加到DC-DC的电压命令上转换器以抑制发生在DC-DC转换器的输入侧LC滤波器上的电振动。

9. 发明公开

EP2706650A3 Power conversion system 有权
标题翻译：电源转换系统
公开(公告)号：EP2706650A3
公开(公告)日：2018-03-14
申请号：EP13180981.6
申请日：2013-08-20
申请人： Hitachi, Ltd. , Hitachi Mito Engineering Co., Ltd.
发明人： Kojima, Tetsuo , Shinomiya, Takeshi , Sugiura, Tetsu
IPC分类号： H02M3/158 , H02M7/493
CPC分类号： H02M3/1584 , H02M7/493
摘要： In a power conversion system in which a plurality of power conversion devices for supplying AC power are operated in parallel, the balancing of the electric current loads on the power conversion devices is achieved without the need of using information communication means among the power conversion devices. Stable parallel operation of the power conversion devices is realized by suppressing the DC component of the zero-phase current flowing among the power conversion devices. To achieve the object, a power conversion system in accordance with the present invention comprises: a first power conversion device; a second power conversion device having the same configuration as the first power conversion device and being connected in parallel with the first power conversion device; and an electricity receiving part which receives AC power from at least one of the first and second power conversion devices. The first power conversion device includes: a DC voltage supply whose intermediate point is grounded; a power converter which converts DC power outputted by the DC voltage supply into AC power; and a controller which controls the power converter based on output voltage of the DC voltage supply and output current of the power converter.
摘要翻译：在并联运行多个交流电力供给用电力转换装置的电力转换系统中，不需要在电力转换装置之间使用信息通信单元，能够实现电力转换装置上的电流负载的平衡。通过抑制在电力转换装置间流动的零相电流的直流成分，实现电力转换装置的稳定的并联运转。为了实现该目的，根据本发明的功率转换系统包括：第一功率转换装置; 第二电力转换装置，其具有与第一电力转换装置相同的配置并且与第一电力转换装置并联连接; 以及电力接收部分，其从第一和第二电力转换装置中的至少一个接收AC电力。第一功率转换装置包括：中间点接地的直流电压源; 电力转换器，将由所述直流电压源输出的直流电力转换为交流电力; 以及控制器，其基于电力转换器的DC电压供应和输出电流的输出电压来控制电力转换器。

10. 发明公开

EP2816717A3 Electric power conversion system equipped with electric storage device 有权
标题翻译：与蓄电装置的功率转换系统
公开(公告)号：EP2816717A3
公开(公告)日：2015-09-16
申请号：EP14168537.0
申请日：2014-05-15
申请人： Hitachi, Ltd.
发明人： Shinomiya, Takeshi , Nakamura, Yasushi , Ayata, Masataka , Sugiura, Tetsu , Nakata, Kiyoshi
IPC分类号： H02M7/48 , B60L11/18 , H02M7/00
CPC分类号： H02M7/48 , B60L11/1801 , B60L11/1814 , H02M7/003
摘要： To suppress resonance operation in a DC unit to which an inverter circuit and a DC-DC converting circuit are connected, a surge voltage generated upon switching of the DC-DC converting circuit and unbalance of load current between phases, and to realize stable control of the inverter circuit and the DC-DC converting circuit.
By configuring the inverter circuit and the DC-DC converting circuit which configure an electric power conversion system within the same unit along with a shared capacitor at a DC input side, variation in wiring inductance between the inverter circuit and the DC-DC converting circuit and circuit inductance between the phases is reduced.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式