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1. 发明专利

JP2005027436A Circuit for detecting cross current of power converter, and uninterruptive power supply system 有权
标题翻译：用于检测功率转换器的交流电流的电路和不间断电源系统
公开(公告)号：JP2005027436A
公开(公告)日：2005-01-27
申请号：JP2003190745
申请日：2003-07-03
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MEGURO HIKARI , TANIGUCHI YOSHIHIRO , ICHIKAWA TOMOKAZU
IPC分类号： H02J9/06 , H02J1/10 , H02J3/38 , H02M7/493 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To achieve the cost reduction, the facilitation of a circuit, the improvement of maintainability, and the improvement of accuracy in control, by detecting the amount of a cross current from an output current, so as to reduce the cross current of the output current of each power converter, thereby controlling a power converter device, in the case of connecting AC lines in parallel with one another in two or more power converters. SOLUTION: In a circuit for detecting the cross currents of power converters, each AC output line of two or more power converters is passed through individual first current sensors, and each AC output line is connected in parallel with one another and besides which has a circuit connected in parallel with load or an AC power source and controls the output AC current of each power converter from individual first current sensors described above. The circuit has two or more first circuits where individual resistors are connected in parallel with the above individual first current sensors, and the above two or more first circuits are connected in parallel with one another. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：通过从输出电流检测交叉电流的量来实现成本降低，电路的便利化，可维护性的提高和控制精度的提高，以便减少在两个或更多个功率转换器中彼此并联连接AC线的情况下，每个功率转换器的输出电流的交叉电流，从而控制功率转换器装置。
解决方案：在用于检测功率转换器的交叉电流的电路中，两个或更多个功率转换器的每个AC输出线通过各个第一电流传感器，并且每个AC输出线彼此并联连接，并且除此之外具有与负载或AC电源并联的电路，并且从上述各个第一电流传感器控制每个功率转换器的输出AC电流。该电路具有两个或更多个第一电路，其中各个电阻器与上述单独的第一电流传感器并联连接，并且上述两个或更多个第一电路彼此并联连接。版权所有（C）2005，JPO＆NCIPI

2. 发明专利

JP2009131122A Uninterruptible power supply device 有权
标题翻译：不间断电源设备
公开(公告)号：JP2009131122A
公开(公告)日：2009-06-11
申请号：JP2007306396
申请日：2007-11-27
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ICHIKAWA TOMOKAZU , TANIGUCHI YOSHIHIRO , MEGURO HIKARI
IPC分类号： H02J9/06 , H02M3/145 , H02M3/155
摘要： PROBLEM TO BE SOLVED: To provide an uninterruptible power supply device of lower cost and smaller size by reducing a discharge current flowing a DC-DC converter at commercial power source failure. SOLUTION: A DC-DC converter 5 that normally charges a storage battery steps up and discharges a storage battery 7 at commercial power source failure so that a DC power is supplied to an inverter 3. The operation of a converter 2 which converts AC to DC when a commercial power source is normal is stopped on the occurrence of failures with a commercial power source 1, and a switch 13 keeps the converter 2 and the storage battery 7 in connected state. Under this condition, a switching element 22 of the converter 2 operates in the same manner as the DC-DC converter 5, to allow the storage battery 7 to supply power to the inverter 3. With this configuration, a plurality of DC-DC converters are allowed to operate at commercial power source failure, reducing the currents flowing the DC-DC converter 5. The cost of the switching elements 21 and 22 can be reduced while the number of workers can be decreased, with a reactor for the DC-DC converters being miniaturized. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：通过减少在商业电源故障下流过DC-DC转换器的放电电流来提供更低成本和更小尺寸的不间断电源装置。解决方案：通常对蓄电池充电的DC-DC转换器5在商业电源故障时升压并放电蓄电池7，从而将DC电力提供给逆变器3.转换器2的操作，其转换在商业电源1发生故障时停止商用电源正常时的交流直流，开关13使转换器2和蓄电池7保持连接状态。在这种情况下，转换器2的开关元件22以与DC-DC转换器5相同的方式操作，以允许蓄电池7向逆变器3供电。利用这种配置，多个DC-DC转换器允许在商业电源故障下工作，减少流过DC-DC转换器5的电流。可以减少开关元件21和22的成本，同时可以减少工作人员的数量，使用DC-DC的电抗器转换器小型化。版权所有（C）2009，JPO＆INPIT

3. 发明专利

JP2005110384A Dc-dc converter 有权
标题翻译： DC-DC转换器
公开(公告)号：JP2005110384A
公开(公告)日：2005-04-21
申请号：JP2003339043
申请日：2003-09-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MEGURO HIKARI , TANIGUCHI YOSHIHIRO , ICHIKAWA TOMOKAZU
IPC分类号： H02M3/28
摘要： PROBLEM TO BE SOLVED: To provide a DC-DC converter which raises efficiency by reducing loss without raising rated voltage of a switching element.
SOLUTION: In this DC-DC converter, a first switching element, which has a low conduction loss, though the first element is a low-speed switching element, is arranged on the primary side of a transformer, and a second switching element, which is switched at high speed though the second element has a high conduction loss, is arranged on the secondary side of the transformer 3, and at turn on or turn off of the first switching element, the secondary side of the second switching element is short-circuited so as to suppress the surge voltage generated across the first switching element.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种DC-DC转换器，其通过在不增加开关元件的额定电压的情况下降低损耗来提高效率。解决方案：在该DC-DC转换器中，在变压器的初级侧布置有通过第一元件具有低导通损耗的第一开关元件是低速开关元件，并且第二开关元件，其通过第二元件具有高导通损耗而被高速切换，被布置在变压器3的次级侧，并且在第一开关元件的接通或断开时，第二开关元件的次级侧被短路，以便抑制跨越第一开关元件产生的浪涌电压。版权所有（C）2005，JPO＆NCIPI

4. 发明专利

JP2006238514A Uninterruptible power supply device 审中-公开
标题翻译：不间断电源设备
公开(公告)号：JP2006238514A
公开(公告)日：2006-09-07
申请号：JP2005045452
申请日：2005-02-22
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ICHIKAWA TOMOKAZU , TANIGUCHI YOSHIHIRO , MEGURO HIKARI
IPC分类号： H02J9/06 , H02J7/00
摘要： PROBLEM TO BE SOLVED: To exactly make a diagnosis of the life of an accumulator irrespective of the degree of a load without installing an exclusive discharging circuit, in an uninterruptible power supply device having a converter that is not equipped with a regenerative function. SOLUTION: The uninterruptible power supply device comprises: the converter 2 that is not equipped with the regenerative function that converts an AC fed from a commercial power supply 1 to a DC; a smoothing capacitor 3 that smoothes the DC converted by the capacitor; an inverter 4 that converts the DC smoothed by the smoothing capacitor to an AC, and feeds it to the load; and the accumulator 8 that is connected, via a DC/DC converter 7, to a DC circuit to which the smoothing capacitor is connected. The uninterruptible power supply device is also characterized in that: a discharging current is made to flow to the smoothing capacitor from the accumulator by controlling the DC/DC converter, to raise a voltage of the smoothing capacitor; an accumulator diagnosis means 20 that makes a diagnosis of the life of the accumulator on the basis of the discharging current and an accumulator voltage at that time is arranged; and the discharging current is made to sufficiently flow by using the smoothing capacitor. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：在具有不具有再生功能的转换器的不间断电源装置中，为了在不安装专用放电电路的情况下对负载的程度进行诊断，而不考虑负载的程度。解决方案：不间断电源装置包括：转换器2，其不具备将从商用电源1馈送的AC转换成DC的再生功能; 平滑电容器3，其平滑由电容器转换的DC; 将由平滑电容器平滑的DC转换为AC并将其馈送到负载的反相器4; 以及经由DC / DC转换器7连接到连接了平滑电容器的DC电路的蓄电池8。不间断电源装置的特征还在于，通过控制DC / DC转换器使放电电流从蓄电池流向平滑电容器，以提高平滑电容器的电压; 蓄电池诊断装置20，其基于放电电流和此时的蓄电池电压来诊断蓄电池的寿命; 通过使用平滑电容器使放电电流充分流动。版权所有（C）2006，JPO＆NCIPI

5. 发明专利

JP2004295984A Magnetic head slider and magnetic disk device using this 审中-公开
公开(公告)号：JP2004295984A
公开(公告)日：2004-10-21
申请号：JP2003085849
申请日：2003-03-26
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HASHIMOTO SEIJI , TANIGUCHI YOSHIHIRO
IPC分类号： G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To prevent a contact between a slider and a disk recording medium in loading by reducing a change in the floating quantity of the slider accompanying a change in a peripheral speed of a disk.
SOLUTION: This device is a magnetic head slider provided with a front pad 13 consisting of a front step bearing 5, side rail planes 6, 7, and side step bearings 8, 9, a sensor pad 14 consisting of a center rail plane 11 having a magnetic transducer 19, and a rear step bearing 10 surrounding the center rail plane, and a negative pressure groove 12 surrounded by the step bearing. sub-side step bearings 15, 16 connected to the side step bearings 8, 9 at a longitudinal direction center part of a magnetic head slider are provided in the vicinity of an air outflow end 4, the sub-side step bearings 15, 16 are formed more deep than the side step bearings 8, 9 and more shallowly than the negative pressure groove 12, and sub-negative pressure grooves 17, 18 being more deep than the negative pressure groove are formed at periphery of the sub-side step bearings 15, 16.
COPYRIGHT: (C)2005,JPO&NCIPI

6. 发明专利

JPH11332130A UNINTERRUPTIBLE POWER SUPPLY 失效
公开(公告)号：JPH11332130A
公开(公告)日：1999-11-30
申请号：JP13630798
申请日：1998-05-19
申请人： HITACHI LTD
发明人： MEGURO HIKARI , SHIMADA KEIZO , TANIGUCHI YOSHIHIRO , KUNISADA HIDEAKI , UMETSU HIDEYASU
IPC分类号： H02J7/34 , H02J9/00 , H02J9/06
摘要： PROBLEM TO BE SOLVED: To reduce positive and negative surge voltages generated at the output terminal of an UPS, without increasing the number of parts by equipping a charger with a means which is connected to the output terminal and rectifies the positive and negative voltages together, and a capacitor for smoothing the output of the rectifying means. SOLUTION: In an uninterruptible power supply, which converts a DC power of a battery into an AC power at the service interrupt and outputs it to an output terminal 4 to which a load is connected, the input terminal of a full-wave rectifier 31 capable of rectifying both the positive and negative voltages is connected to the output terminal 4 of the UPS, and a capacitor 10 connected in parallel to the output of the full-wave rectifier 31 and a regulator 11 which charges a battery 8 are connected. Consequently, the voltage of both terminals of the capacitor 10 becomes the maximum voltage of a first or second AC power. As a result of this, high surge voltages generated at the UPS output terminal 4 are absorbed by the capacitor 10 via the full-wave rectifier 31, and surge voltages are reduced. Accordingly, it becomes possible to have the performance of the UPS improved.

7. 发明专利

JPH11299129A UNINTERRUPTIBLE POWER SUPPLY SYSTEM CONNECTED IN PARALLEL WITH POWER SUPPLY 失效
公开(公告)号：JPH11299129A
公开(公告)日：1999-10-29
申请号：JP10731898
申请日：1998-04-17
申请人： HITACHI LTD
发明人： KANOUDA TAMAHIKO , KUBO KENJI , SAKURAI YOSHIMI , UMETSU HIDEYASU , KUNISADA HIDEAKI , TANIGUCHI YOSHIHIRO
IPC分类号： H02J9/06 , H02M3/155 , H02M7/12 , H02M7/219 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To make it possible to significantly reduce the capacitance of a reactor placed between a commercial power supply and a load, by installing a switching means which allows a switching element for a voltage increasing/ decreasing chopper of half-bridge configuration and a switching element for an inverter to be connected in parallel. SOLUTION: When the input voltage effective value is under a rated voltage, a changer 12 is connected to 'A'. At this time, a switching element 13b operates as a step-down chopper circuit, and a storage battery 9 is charged from a voltage source formed in capacitors 14a, 14b. When the input voltage effective value is between quasi-overvoltage and overvoltage and between quasi-low voltage and low voltage, the changer 12 is connected to 'B', and switching elements 13a and 13c, 13b and 13d are parallel-connected to perform voltage compensation. When the input voltage effective value exceeds the overvoltage or falls below the low voltage, a relay 2 on the input side is turned off to fix the changer at 'A' and the switching element 13a is caused to perform chopping operation to discharge the storage battery 9.

8. 发明专利

JPH11215738A UNINTERRUPTIBLE POWER SUPPLY 失效
公开(公告)号：JPH11215738A
公开(公告)日：1999-08-06
申请号：JP1228698
申请日：1998-01-26
申请人： HITACHI LTD
发明人： KANOUDA TAMAHIKO , KUBO KENJI , TOKUNAGA KIICHI , SAKURAI YOSHIMI , UMETSU HIDEYASU , KUNISADA HIDEAKI , TANIGUCHI YOSHIHIRO
IPC分类号： H02J9/06
摘要： PROBLEM TO BE SOLVED: To reduce the load of an inverter of an uninterruptible power supply, when a commercial power supply system is normal by connecting its important load with a master output terminal having a stationary voltage compensating function and an active-filter function which are generated through the inverter, and by connecting its other loads with a bypass-output side. SOLUTION: When starting an uninterruptible power supply, an input-side relay 2 is opened, and switches 9a, 9b are both connected with a bypass-output 13 side not to connect an inverter 7 with any loads 5a-5d. When a commercial AC power supply 1 with a rated voltage and a stationary frequency is inputted, in a service-interrupt sensing circuit, the effective value of the input voltage is computed by an effective-value computing circuit to close the input-side relay 2. Also, the switch 9b is set to the bypass-output 13 side at it is. On the other hand, when starting the uninterruptible power supply, an inverter-fault sensing circuit starts its operation too. That, is the effective value of the output voltage of the inverter 7 is determined by an abnormal-voltage discriminating circuit, the presence of the abnormality of its gate signal is discriminated. Then, if there is no abnormality, the switch 9a is connected with an inverter-output 12 side.

9. 发明专利

JPH09233714A UNINTERRUPTIVE POWER SUPPLY UNIT 失效
公开(公告)号：JPH09233714A
公开(公告)日：1997-09-05
申请号：JP3458296
申请日：1996-02-22
申请人： HITACHI LTD
发明人： HOUSEN NORIKO , KOBAYASHI AKIRA , TANIGUCHI YOSHIHIRO
IPC分类号： H02J7/00 , H02J7/34 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To provide a power supply device capable of indicating the residual capacity of a battery taking into consideration deterioration of the battery due to the installation time. SOLUTION: A control device 9 receives the voltage value and the current value of a battery 5 from a circuit 6 to detect the battery voltage and a circuit 7 to detect the battery current, the power to be charged/discharged to/from the battery 5 is calculated, and the residual capacity of the battery 5 is obtained from the power. The residual capacity is corrected by deterioration of the battery capacity due to the battery installation time inputted from a battery installation time measuring means, and the corrected value is outputted to an indicator 10. The indicator 10 indicates the residual capacity of the battery inputted from the control device 9.

10. 发明专利

JPH07131942A UNINTERRUPTIVE POWER UNIT 失效
公开(公告)号：JPH07131942A
公开(公告)日：1995-05-19
申请号：JP27642993
申请日：1993-11-05
申请人： HITACHI LTD
发明人： TANIGUCHI YOSHIHIRO , SHIRAHAMA HIDEFUMI , MINO TOMOAKI , TOYODA MASASHI , SHIMADA KEIZO , INUKAI SATORU
IPC分类号： H02J9/06
摘要： PURPOSE:To provide an uninterruptive power unit easy of operation and maintenance by providing a figure information storage means which codes and stores beforehand figure information to show the mounting positions of the parts constituting a device such as a rectifier circuit, an inverter circuit, a storage battery, a control circuit, a group of operation switches. CONSTITUTION:A memory 26 is provided, which codes and stores beforehand figure information to show the mounting positions of the parts constituting a device such as a rectifier circuit, an inverter circuit, a storage battery, a control circuit, a group of operation switches. And, CPU 21 receives a fault signal, a state signal from an input port 24 and reads the operation and maintenance information geared to the fault signal and the state signal out of the memory 26 and displays it on a liquid crystal display 27. Hereby, the mounting position of the parts constituting a device can be illustrated, and the operation and the maintenance of the uninterruptive power unit can be facilitated.

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