专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明专利

JP2008011606A Power converter and power conversion method 有权
标题翻译：功率转换器和功率转换方法
公开(公告)号：JP2008011606A
公开(公告)日：2008-01-17
申请号：JP2006177487
申请日：2006-06-28
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： AKITA YOSHITOSHI , SHIGYO MASAKANE , NAGATA HIROSHI
IPC分类号： H02M7/483 , H02P27/06
CPC分类号： H02M5/4585 , H02M7/487 , H02M7/493 , H02M2001/0009 , H02M2001/008 , Y02B70/145
摘要： PROBLEM TO BE SOLVED: To provide a three-level power converter which can surely suppress the variation of a DC neutral point voltage. SOLUTION: In the three-level power converter arranged with resonance suppressing resistors at a converter side and an inverter side, respectively, on an intermediate potential busbar: intermediate resistors are individually arranged at the converter side and the inverter side; a DC neutral point voltage controller 55 which uses a DC neutral point voltage between the converter-side resonance suppressing resistor 24 and the converter-side intermediate resistor 27, and a DC neutral point voltage controller 65 which uses a DC neutral point voltage between and among a converter-side DC neutral point voltage controller for controlling, an inverter-side resonance suppressing resistor 34 and an inverter-side intermediate resistor 37 are arranged in the three-level power converter, and the switching and the simultaneous use of DC neutral point voltage control at the converter side and the inverter side are conducted depending on an operation state by using a switching determination part 67. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够可靠地抑制直流中性点电压的变化的三电平电力转换器。解决方案：在转换器侧和反相器侧分别配置有谐振抑制电阻的三电平电力转换器，分别在中间电位母线上：中间电阻器分别设置在转换器侧和逆变器侧; 使用转换器侧共振抑制电阻器24和转换器侧中间电阻器27之间的直流中性点电压的直流中性点电压控制器55以及使用直流中性点电压之间的直流中性点电压控制器65 用于控制逆变器侧共振抑制电阻器34和逆变器侧中间电阻器37的转换器侧直流中性点电压控制器被布置在三电平电力转换器中，并且直流中性点电压的切换和同时使用转换器侧和逆变器侧的控制通过使用切换判定部67而根据操作状态进行。版权所有（C）2008，JPO＆INPIT

12. 发明专利

JP2007102388A Maintenance support device, maintenance support method, maintenance support system, controller, and control method 审中-公开
标题翻译：维护支持设备，维护支持方法，维护支持系统，控制器和控制方法
公开(公告)号：JP2007102388A
公开(公告)日：2007-04-19
申请号：JP2005289497
申请日：2005-10-03
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： AKITA YOSHITOSHI , OKAMATSU SHIGETOSHI , NAGATA HIROSHI
IPC分类号： G05B23/02
摘要： PROBLEM TO BE SOLVED: To reduce loss due to the non-operation of a facility of a user by performing quick cause investigation and restoration when any failure is occurred and an efficient maintenance operation for preventing the failure in advance. SOLUTION: The same controller 5a as that at a user side and a simulation device 23 for simulating a system at the user side are installed at a maker side, and a program in a user side arithmetic processing part 9 and user side operation status data stored in a memory 10 when the failure is occurred are automatically transmitted, and the program is integrated into a maker side arithmetic processing part 9a, and the maker side operation status data obtained by operating the simulation device 23 and the user side operation status data are compared by a maintenance support device 25, so that it is possible to quickly specify the factor of the failure. Also, the user side operation status data are regularly compared with the maker side operation status data or the past user side operation status data stored in a maintenance data server 31, so that it is possible to specify a differential changed section, and the inspection of the corresponding components is selectively executed, so that it is possible to achieve efficient maintenance check. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：通过在发生故障时进行快速的原因调查和恢复，以及提前防止故障的有效的维护操作，减少由于用户的设施的不操作造成的损失。解决方案：在制造者侧安装与用户侧相同的控制器5a和用于模拟用户侧的系统的模拟装置23，并且在用户侧运算处理部9中的程序和用户侧操作发生故障时存储在存储器10中的状态数据被自动发送，并且程序被集成到制造者侧算术处理部分9a中，并且通过操作模拟装置23获得的制造者侧操作状态数据和用户侧操作状态数据由维护支持设备25进行比较，使得可以快速指定故障的因素。此外，用户侧操作状态数据与存储在维护数据服务器31中的制造商侧操作状态数据或过去的用户侧操作状态数据进行定期比较，使得可以指定差分改变部分，并且检查选择性地执行相应的部件，从而可以实现有效的维护检查。版权所有（C）2007，JPO＆INPIT

13. 发明专利

JP2007028742A Power converter and power conversion method 有权
标题翻译：功率转换器和功率转换方法
公开(公告)号：JP2007028742A
公开(公告)日：2007-02-01
申请号：JP2005205039
申请日：2005-07-14
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAGATA HIROSHI , TOMINO YOJI , NISHIKAWA KEIICHIRO
IPC分类号： H02M7/48 , H02M7/493
摘要： PROBLEM TO BE SOLVED: To achieve desired power conversion capacity N×P[W], without using special wiring parts, in a power converter where n pieces of basic power converting main circuits of capacity P[W] are connected in parallel so as to increase the capacity of its power conversion. SOLUTION: The relative mounting positional relation between a power supply port (3) and a current output point (7) is put on a diagonal (14) between power converting main circuits (11P) and (12P). Hereby, each impedance becomes the same in a current path which reaches a current output point (7), passing each of the basic power converting main circuits (11P) and (12P) from DC voltage (2). Hereby, the power converter of desired power conversion capacity N×P[W] is built without using special wiring parts for parallel connection. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了在并行地连接n个容量P [W]的基本功率转换主电路的功率转换器中实现期望的功率转换能力N×P [W]，而不使用特殊的布线部分以增加其电源转换的容量。解决方案：电源端口（3）和电流输出点（7）之间的相对安装位置关系置于功率转换主电路（11P）和（12P）之间的对角线（14）上。因此，在到达电流输出点（7）的电流路径中，每个阻抗在通过基本电力转换主电路（11P）和（12P）的每一个都来自直流电压（2）的情况下变得相同。因此，所需的功率转换能力N×P [W]的功率转换器被构建而不使用用于并联的特殊布线部件。版权所有（C）2007，JPO＆INPIT

14. 发明专利

JP2006042570A Control method of induction motor, controller, iron manufacture/non-iron facility, rolling stock, winder, vessel, machine tool, paper machine facility, and conveyance facility 有权
标题翻译：感应电动机控制方法，控制器，铁制造/非铁制设备，轧钢机，风机，船舶，机床，造纸机及输送设备
公开(公告)号：JP2006042570A
公开(公告)日：2006-02-09
申请号：JP2004223130
申请日：2004-07-30
申请人： Hitachi Ltd , Mitsubishi-Hitachi Metals Machinery Inc , 三菱日立製鉄機械株式会社 , 株式会社日立製作所
发明人： TOBISE MASAHIRO , NAGATA HIROSHI , YOSHINARI YOSHITAKA , NITOBE MITSUHIRO , MATSUMOTO HISAYUKI , EBIHARA KAZUMI
IPC分类号： H02P21/00 , H02P27/04
CPC分类号： Y02T10/643
摘要： PROBLEM TO BE SOLVED: To provide a controller and a control method of an induction motor capable of obtaining a high output of a rated output or higher, and to provide an iron manufacture/non-iron facility, rolling stock, a winder, a vessel, a machine tool, a paper machine facility and a conveyance facility in which a power induction motor is controlled by the controller of an induction motor. SOLUTION: In the control method of an induction motor 1 performing vector control by field weakening control, when the field flux is in strengthening field flux state, internally induced electromotive force of the induction motor 1 is increased in proportion, to increase in the rotational speed N at the time of strengthening field flux state; and switching is made to vector control by field weakening control, when the internally induced electromotive force exceeds that at the time of a rated rotational speed. At the time of field weakening control, vector control is performed, while sustaining a constant internally induced electromotive force at the time of switching. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：解决的问题：提供能够获得高额定输出或更高输出的感应电动机的控制器和控制方法，并且提供铁制造/非铁设备，机车车辆，卷绕机，容器，机床，造纸机设备和输送设备，其中感应电动机由感应电动机的控制器控制。解决方案：在通过弱磁控制进行矢量控制的感应电动机1的控制方法中，当场通量处于强化场通量状态时，感应电动机1的内部感应电动势成比例地增加，加强场通量状态时的转速N; 当内部感应电动势超过额定转速时，通过弱磁控制进行矢量控制切换。在弱磁控制时，进行矢量控制，同时在切换时维持恒定的内部感应电动势。版权所有（C）2006，JPO＆NCIPI

15. 发明专利

JP2004135421A Control device for electric motor 有权
公开(公告)号：JP2004135421A
公开(公告)日：2004-04-30
申请号：JP2002297060
申请日：2002-10-10
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAGATA HIROSHI , TOBISE MASAHIRO , KONO YUKIHIRO
IPC分类号： H02P3/18 , H02P27/06 , H02P5/41
摘要： PROBLEM TO BE SOLVED: To stop an electric motor at a predetermined stopping time by instantaneous regenerative electric power smaller than the maximum instantaneous regenerative electric power in stopping the electric motor at constant deceleration, at the time of the emergency stop of the electric motor. SOLUTION: This control device for the electric motor comprises a converter 2 for converting AC power into a DC voltage, an inverter 4 for converting the AC power into AC voltage, an AC electric motor 5, a speed detector 6, a speed control device 7 for controlling an output voltage on the inverter based on a speed command 9 for the electric motor and a speed detecting value, a maximum-speed setter 17, an absolute value circuit 19, an analog divider 16 for calculating a rate of an output of the absolute value circuit 19 and a setting value of the maximum-speed setter 17, a multiplier 15 for multiplying the rate by a setting value 11 of the deceleration, and proportioner 20 for halving the output of the multiplier 15. A deceleration variable means 21 is provided to vary the deceleration of a speed command at the time of the emergency stop of the AC electric motor. The variable control of the deceleration is performed based on an inverse number value of the detecting value of the speed detector 6 to stop the AC electric motor by the variably controlled speed command. COPYRIGHT: (C)2004,JPO

16. 发明专利

JP2017085896A ３レベル電力変換装置有权
公开(公告)号：JP2017085896A
公开(公告)日：2017-05-18
申请号：JP2017029782
申请日：2017-02-21
申请人：株式会社日立製作所 , Hitachi Ltd
发明人： MIWA NAOKI , NAGATA HIROSHI
IPC分类号： H02M7/48
摘要：【課題】電力変換セルを垂直方向に積む場合でも、3レベル電力変換装置の高さ寸法が制限寸法以内に収まるように、電力変換セルの高さ方向の寸法を小さくする。【解決手段】3レベル電力変換装置において、電力変換モジュール集合体の主面に配置された複数個の電力変換モジュールは、その長手方向を水平方向にして規定の長さの範囲内で装置筐体の水平方向に順次並べて配置され、規定の長さを越える分の電力変換モジュールについては、段を変えて配置される。電力変換モジュール集合体内のスイッチング素子、還流ダイオード及び平滑コンデンサとの間は、板状導体を用いて配線されている。そして複数個の電力変換モジュール集合体は、各々の主面が鉛直方向と平行、かつ、各々の長手方向が平行となるように、縦積みで実装され、縦積みされた複数個の電力変換モジュール集合体が対向するように各相に対応して設けられている。【選択図】図5

17. 发明专利

JP2011015455A Three-phase power converter 有权
标题翻译：三相电源转换器
公开(公告)号：JP2011015455A
公开(公告)日：2011-01-20
申请号：JP2009154515
申请日：2009-06-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KATO SHUJI , SHIGYO MASAKANE , NAGATA HIROSHI
IPC分类号： H02M7/48 , H02M7/493
摘要： PROBLEM TO BE SOLVED: To provide a three-phase semiconductor power converter capable of aiming at gaining both of equalization of integrated inductance including connection conductors of each power semiconductor switching element between I/O terminals and ripple reduction of DC capacitors in parallel connection of a plurality of power semiconductor switching elements.SOLUTION: An inverter unit comprises each six groups of semiconductor packages from among even numbers of semiconductor packages, the six groups of semiconductor packages are divided into sets of two groups where each set is allowed to function as U, V, W phases, the six groups of semiconductor package are connected by the same P- and N-side DC busbars, the P- and N-side busbars are allowed to oppose each other while sandwiching a thin insulating layer therebetween to reduce the inductance of the DC busbars, and the inductance of the DC busbars among the U, V, W phases is reduced, thus reducing a ripple current of the DC capacitor.
摘要翻译：要解决的问题：提供一种三相半导体功率转换器，其能够旨在获得集成电感的均衡，包括I / O端子之间的每个功率半导体开关元件的连接导体和直流电容器的纹波减小，并联连接多个功率半导体开关元件。解决方案：逆变器单元包括来自偶数个半导体封装的每组六组半导体封装，六组半导体封装被分成两组，每组允许其作为U， V，W相中，六组半导体封装通过相同的P和N侧直流母线连接，允许P侧和N侧母线彼此相对，同时夹在其间的薄绝缘层以降低电感的直流母线，并且U，V，W相中的直流母线的电感减小，从而减小DCc的纹波电流 apacitor。

18. 发明专利

JP2014116995A Three-level power conversion device 审中-公开
标题翻译：三电平转换装置
公开(公告)号：JP2014116995A
公开(公告)日：2014-06-26
申请号：JP2012266933
申请日：2012-12-06
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MIWA NAOKI , NAGATA HIROSHI
IPC分类号： H02M7/487 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To reduce a dimension in height direction of a power conversion cell so that the height dimension of a 3-level power conversion device will fit within limit dimensions even when power conversion cells are stacked in the vertical direction.SOLUTION: In the 3-level power conversion device, power conversion modules 1-4 including a switching element and a reflux diode are disposed in a power conversion module assembly 20 so that the longer direction of the power conversion modules 1-4 are parallel to the bottom face of a device case. The power conversion modules 1-4 are sequentially juxtaposed in a direction parallel to the device case within a range of prescribed lengths, and some of the power conversion modules 1-4 exceeding the prescribed length are disposed on a new stage.
摘要翻译：要解决的问题：为了减小功率转换单元的高度方向的尺寸，即使在功率转换单元在垂直方向上堆叠时，三电平转换装置的高度尺寸也将适合极限尺寸。解决方案：在 3级电力转换装置，包括开关元件和回流二极管的电力转换模块1-4设置在功率转换模块组件20中，使得电力转换模块1-4的较长方向平行于底面的设备情况。功率转换模块1-4在规定长度的范围内与设备外壳平行的方向依次并列，并且超过规定长度的一部分功率转换模块1-4配置在新的台上。

19. 发明专利

JP2012034462A Power converter controller and control method thereof 有权
标题翻译：电力转换器控制器及其控制方法
公开(公告)号：JP2012034462A
公开(公告)日：2012-02-16
申请号：JP2010170357
申请日：2010-07-29
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SHIMAZAKI MOTOHIKO , NAGATA HIROSHI , KOBAYASHI KIYOTAKA
IPC分类号： H02M7/48 , H02M7/12 , H02M7/483
摘要： PROBLEM TO BE SOLVED: To provide a power converter controller of less power consumption while a motor is stopped, having energy saving effect.SOLUTION: A power converter includes a converter having a rectification function and a regeneration function, and an inverter having an AC power generating function and a regeneration function. It further includes a three-phase/two-phase converter which dissolves the current supplied to a motor from the inverter to extract two orthogonal vector components, in other words a torque current and an excitation current, and a power conversion control circuit which references the vector component of the three-phase/two-phase converter for performing controlling of the current supplied to the motor from the inverter as well as controlling of a DC voltage output from the converter. If rotation of the motor has been stopped, the power conversion control circuit decreases the DC voltage output from the converter and the excitation current output from the inverter.
摘要翻译：要解决的问题：提供在电动机停止时具有较少功耗的电力转换器控制器，具有节能效果。解决方案：电力转换器包括具有整流功能和再生功能的转换器，以及具有交流发电功能和再生功能的逆变器。它还包括一个三相/两相转换器，它将从逆变器提供给电动机的电流溶解以提取两个正交矢量分量，换句话说，转矩电流和励磁电流，以及一个功率转换控制电路用于执行从逆变器控制提供给电动机的电流以及控制从转换器输出的直流电压的三相/两相转换器的矢量分量。如果电动机的旋转停止，则电力转换控制电路减小从转换器输出的直流电压和从逆变器输出的励磁电流。版权所有（C）2012，JPO＆INPIT

20. 发明专利

JP2011030388A Power converter and power conversion method 审中-公开
标题翻译：功率转换器和功率转换方法
公开(公告)号：JP2011030388A
公开(公告)日：2011-02-10
申请号：JP2009176006
申请日：2009-07-29
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NISHIKAWA KEIICHIRO , NAGATA HIROSHI
IPC分类号： H02M7/12
摘要： PROBLEM TO BE SOLVED: To simplify the circuit in a voltage source type power converter including a voltage source power converter and a capacitor connected to the DC side of the converter.
SOLUTION: A discharge circuit for discharging the DC side voltage also serves as a neutral detection circuit for detecting the ground fault abnormality. Loss by the neutral detection circuit and the time of DC voltage drop of a main circuit after stoppage of the power converter are kept, respectively, within an acceptable range by selecting the resistance of the neutral detection circuit so that the ratio of power consumption to the rated power of the power converter when the grounding can be detected and the main circuit voltage is always applied and the discharge time constant determined by the resistance and the capacitance of the DC side capacitor fall to or below the design tolerance of the power converter.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了简化包括电压源功率转换器和连接到转换器的DC侧的电容器的电压源型功率转换器中的电路。解决方案：用于放电直流侧电压的放电电路也用作检测接地故障异常的中性检测电路。通过选择中性点检测电路的电阻，将功率转换器停止后的中性检测电路的损耗和主电路的直流电压降的时间分别保持在可接受的范围内，使得功耗与当检测到接地并且总是施加主电路电压并且由电阻和DC侧电容器的电容确定的放电时间常数降低到或低于功率转换器的设计容限时，功率转换器的额定功率。版权所有（C）2011，JPO＆INPIT

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