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21. 发明授权

US08866342B2 Power converting apparatus 有权
标题翻译：电力转换装置
公开(公告)号：US08866342B2
公开(公告)日：2014-10-21
申请号：US12922859
申请日：2009-03-18
申请人： Akihiko Iwata , Takeshi Oi , Masato Koyama
发明人： Akihiko Iwata , Takeshi Oi , Masato Koyama
IPC分类号： H02J1/00 , H02M7/49 , H02M7/501 , H02M1/00
CPC分类号： H02M7/49 , H02M7/501 , H02M2001/0077 , Y02B70/1483 , Y10T307/707
摘要： A power converting apparatus includes a first inverter circuit including a high-voltage first DC voltage source and operated at a low frequency using Si IGBTs having a high withstand voltage exceeding 1000 V and a second inverter circuit including a low-voltage capacitor operated by high-frequency PWM using SiC MOSFETs having a low withstand voltage, wherein an AC side of the first inverter circuit is connected in series to an AC side of the second inverter circuit. The power converting apparatus outputs AC power having a prescribed voltage waveform obtained from the sum of voltages generated by the first and second inverter circuits.
摘要翻译：电力转换装置包括：第一逆变器电路，包括高电压第一直流电压源，并且使用具有超过1000V的高耐受电压的Si IGBT并且以低频运行的第二逆变器电路;以及包括由高压电容器操作的低压电容器的第二逆变器电路，使用具有低耐受电压的SiC MOSFET的高频PWM，其中第一反相器电路的AC侧与第二反相器电路的AC侧串联连接。电力转换装置输出从由第一和第二逆变器电路产生的电压之和获得的具有规定电压波形的AC电力。

22. 发明授权

US08754549B2 Power conversion device 失效
标题翻译：电源转换装置
公开(公告)号：US08754549B2
公开(公告)日：2014-06-17
申请号：US13055153
申请日：2009-07-23
申请人： Tomoyuki Kawakami , Akihiko Iwata , Tatsuya Okuda
发明人： Tomoyuki Kawakami , Akihiko Iwata , Tatsuya Okuda
IPC分类号： H02M3/18 , H02J7/35 , G05F1/67 , H02M3/07 , H02J7/34
CPC分类号： G05F1/67 , H02J7/345 , H02J7/35 , H02M3/07 , Y02E10/58
摘要： In a power conversion device which performs DC/DC conversion, an inverter circuit (20), which is formed of one or more single-phase inverters (20a) and (20b) connected in series to each other, is connected in series to a DC power supply (1) in its subsequent stage. In further subsequent stage, a smoothing capacitor (6) connected to the inverter circuit (20) via a rectifier diode (5), and a shorting switch (4) which bypasses the smoothing capacitor (6) are provided. The shorting switch (4) is switched ON to charge capacitors (25) and (35) included in the single-phase inverter (20a) and (20b), respectively, whereas the shorting switch (4) is switched OFF to discharge the capacitors (25) and (35), whereby the voltage of the smoothing capacitor (6) is controlled.
摘要翻译：在进行DC / DC转换的电力变换装置中，由串联连接的一个以上的单相逆变器（20a）和（20b）构成的逆变器电路（20）与直流电源（1）在其后续阶段。在后续的阶段中，设置经由整流二极管（5）与逆变器电路（20）连接的平滑电容器（6）和绕过平滑电容器（6）的短路开关（4）。短路开关（4）接通，分别对包含在单相逆变器（20a）和（20b）中的电容器（25）和（35）充电，而短路开关（4）断开以对电容器（25）和（35），从而控制平滑电容器（6）的电压。

23. 发明授权

US07957164B2 Power device for supplying AC voltage to a load having a discharge part 有权
标题翻译：用于向具有放电部分的负载提供AC电压的功率器件
公开(公告)号：US07957164B2
公开(公告)日：2011-06-07
申请号：US11587302
申请日：2004-04-21
申请人： Hitoshi Kidokoro , Masato Matsubara , Akihiko Iwata , Hiroyasu Iwabuki , Akihiro Suzuki
发明人： Hitoshi Kidokoro , Masato Matsubara , Akihiko Iwata , Hiroyasu Iwabuki , Akihiro Suzuki
IPC分类号： H02M5/40
CPC分类号： H02M7/53871 , H02M2007/4815 , Y02B70/1441
摘要： The present invention provides a power device including a converter part (2) for converting an AC voltage to a DC voltage; an inverter part (3) for converting the DC voltage outputted from the converter part (2) to the AC voltage; and a transformer (4) having an inductance forming a series resonance circuit together with an electrostatic capacity of a load (20) to boost the AC voltage outputted from the inverter part (3). In the power device, an inductance (7) is connected to the output part of the inverter part (3) in parallel with the transformer (4). Thus, in a discharge part 6 provided in the load (20), since when a discharge is not generated, a recovery current is not supplied to a circulating current diode in the inverter part (3), or the quantity of the recovery current is reduced, the heat generation of the circulating current diode can be suppressed without increasing the number of elements of the circulating current diode.
摘要翻译：本发明提供了一种功率器件，包括用于将AC电压转换为DC电压的转换器部分（2）; 用于将从转换器部分（2）输出的DC电压转换为AC电压的逆变器部分（3）; 以及变压器（4），其具有形成串联谐振电路的电感以及负载（20）的静电电容，以升高从逆变器部分（3）输出的交流电压。在功率器件中，电感（7）与变压器（4）并联连接到逆变器部分（3）的输出部分。因此，在设置在负载（20）中的放电部6中，由于在不产生放电的情况下，在逆变器部（3）中不向循环电流二极管供给恢复电流，或者恢复电流的量为减少，可以抑制循环电流二极管的发热，而不增加循环电流二极管的元件数量。

24. 发明申请

US20100177540A1 POWER CONVERSION APPARATUS 有权
标题翻译：功率转换装置
公开(公告)号：US20100177540A1
公开(公告)日：2010-07-15
申请号：US12715430
申请日：2010-03-02
申请人： Akihiko Iwata , Makoto Seto , Masaki Yamada , Shigeki Harada , Noriyuki Matsubara , Takashi Kumagai
发明人： Akihiko Iwata , Makoto Seto , Masaki Yamada , Shigeki Harada , Noriyuki Matsubara , Takashi Kumagai
IPC分类号： H02M7/48
CPC分类号： H02J3/383 , H02M7/483 , H02M2001/007 , H02M2001/0077 , Y02E10/563
摘要： In a power conversion apparatus that boosts a solar light voltage, converts it to AC and supplies AC power to a load or system, power loss is reduced and efficiency is improved. An inverter unit, in which AC sides of three single-phase inverters receive DC power from respective sources with a voltage ratio of 1:3:9 as respective inputs are connected in series. Gradational output voltage control of an output voltage is carried out using the sum of the respective generated AC voltages. Also, a solar light voltage is boosted by a chopper circuit to generate the highest voltage DC power source. When the solar light voltage exceeds a predetermined voltage, the boosting of the chopper circuit is stopped, thereby reducing power loss due to the boosting.
摘要翻译：在提高太阳光电压的电力转换装置中，将其转换为交流电并向负载或系统提供AC电力，降低功率损耗并提高效率。三相单相逆变器的AC侧以相互输入的电压比为1：3：9的各个电源的DC电源串联连接的逆变器单元。使用各自产生的AC电压的和来执行输出电压的等级输出电压控制。此外，太阳能光伏电压由斩波电路升压以产生最高电压的直流电源。当太阳光电压超过预定电压时，斩波电路的升压停止，由此降低由于升压引起的功率损耗。

25. 发明授权

US07719865B2 Power conversion apparatus 有权
标题翻译：电力转换装置
公开(公告)号：US07719865B2
公开(公告)日：2010-05-18
申请号：US11816456
申请日：2006-02-21
申请人： Akihiko Iwata , Makoto Seto , Masaki Yamada , Shigeki Harada , Noriyuki Matsubara , Takashi Kumagai
发明人： Akihiko Iwata , Makoto Seto , Masaki Yamada , Shigeki Harada , Noriyuki Matsubara , Takashi Kumagai
IPC分类号： H02M7/49
CPC分类号： H02J3/383 , H02M7/483 , H02M2001/007 , H02M2001/0077 , Y02E10/563
摘要： In a power conversion apparatus that boosts a solar light voltage, converts it to AC and supplies AC power to a load or system, power loss is reduced and efficiency is improved. An inverter unit, in which AC sides of three single-phase inverters receive DC power from respective sources with a voltage ratio of 1:3:9 as respective inputs are connected in series. Gradational output voltage control of an output voltage is carried out using the sum of the respective generated AC voltages. Also, a solar light voltage is boosted by a chopper circuit to generate the highest voltage DC power source. When the solar light voltage exceeds a predetermined voltage, the boosting of the chopper circuit is stopped, thereby reducing power loss due to the boosting.
摘要翻译：在提高太阳光电压的电力转换装置中，将其转换为交流电并向负载或系统提供AC电力，降低功率损耗并提高效率。三相单相逆变器的AC侧以相互输入的电压比为1：3：9的各个电源的DC电源串联连接的逆变器单元。使用各自产生的AC电压的和来执行输出电压的等级输出电压控制。此外，太阳能光伏电压由斩波电路升压以产生最高电压的直流电源。当太阳光电压超过预定电压时，斩波电路的升压停止，由此降低由于升压引起的功率损耗。

26. 发明申请

US20100052598A1 POWER REGENERATIVE CONVERTER 有权
标题翻译：功率再生转换器
公开(公告)号：US20100052598A1
公开(公告)日：2010-03-04
申请号：US12524316
申请日：2007-04-10
申请人： Yoshitomo Hayashi , Akihiko Iwata
发明人： Yoshitomo Hayashi , Akihiko Iwata
IPC分类号： H02P3/18
CPC分类号： H02P27/06 , H02M7/797 , H02P9/006 , H02P29/0241
摘要： There are provided a smoothing capacitor (71) for storing an induced electromotive force generated by a three-phase induction motor (5), a regenerative transistor (81 to 86) for switching a terminal voltage of the smoothing capacitor to carry out a power regenerating operation over a three-phase AC power supply (3), a line voltage detecting portion (6) for detecting a line voltage of the three-phase AC power supply, a fundamental waveform generating portion (10) for generating, from a signal output from the line voltage detecting portion, a fundamental waveform defined to be a line voltage waveform of the three-phase AC power supply in which a source voltage distortion component is not mixed, a base driving signal creating portion (7) for creating a base driving signal to be used for an ON/OFF control of the regenerative transistor based on a signal output from the fundamental waveform generating portion, and a base driving signal output portion (9) for outputting the base driving signal.
摘要翻译：提供一种用于存储由三相感应电动机（5）产生的感应电动势的平滑电容器（71），用于切换平滑电容器的端电压的再生晶体管（81至86），以执行电力再生通过三相交流电源（3），用于检测三相交流电源线路电压的线路电压检测部分（6），从信号输出端产生的基波形成部分（10）来自线电压检测部分的基本波形被定义为不混合源电压失真分量的三相AC电源的线电压波形，用于产生基极驱动的基极驱动信号产生部分（7）信号用于根据从基波形成部分输出的信号进行再生晶体管的ON / OFF控制;以及基本驱动信号输出部（9），用于输出基本驱动符号 al。

27. 发明申请

US20100019753A1 DC/DC POWER CONVERTING APPARATUS 有权
标题翻译：直流/直流电源转换装置
公开(公告)号：US20100019753A1
公开(公告)日：2010-01-28
申请号：US12441025
申请日：2007-05-17
申请人： Matahiko Ikeda , Takahiro Urakabe , Kiyoharu Anzai , Akihiko Iwata , Hirotoshi Maekawa , Toshiyuki Kikunaga , Masaru Kobayashi , Tatsuya Okuda
发明人： Matahiko Ikeda , Takahiro Urakabe , Kiyoharu Anzai , Akihiko Iwata , Hirotoshi Maekawa , Toshiyuki Kikunaga , Masaru Kobayashi , Tatsuya Okuda
IPC分类号： G05F3/16
CPC分类号： H02M3/158 , H02M2001/0077
摘要： Three or more circuits including a driving inverter circuit and rectifier circuits are connected in series, each of the circuits including a high-voltage side MOSFET and a low-voltage side MOSFET connected in series as well as a smoothing capacitor having positive and negative terminals between which the MOSFETs are connected. LC series circuits, each including a capacitor and an inductor, are disposed individually between one specific circuit and the other circuits with periods of resonance of the LC series circuits made equal to one another. In performing DC/DC power conversion through charging and discharging operation of the capacitors, a resonance phenomenon of the LC series circuits is used to improve conversion efficiency and achieve a reduction in size of the apparatus structure.
摘要翻译：包括驱动逆变器电路和整流电路的三个或更多个电路串联连接，每个电路包括串联连接的高压侧MOSFET和低压侧MOSFET，以及平滑电容器，其间具有正极和负极端子 MOSFET连接。 LC串联电路各自包括电容器和电感器，分别设置在一个特定电路和其它电路之间，其中LC串联电路的谐振周期彼此相等。在通过电容器的充放电操作进行DC / DC电力转换时，使用LC串联电路的谐振现象来提高转换效率并实现装置结构的尺寸减小。

28. 发明申请

US20100014335A1 THREE-PHASE POWER CONVERTING APPARATUS 有权
标题翻译：三相电源转换器
公开(公告)号：US20100014335A1
公开(公告)日：2010-01-21
申请号：US12527709
申请日：2008-02-20
申请人： Akihiko Iwata , Hiroshi Ito , Hirofumi Akagi , Hideaki Fujita , Takushi Jimichi
发明人： Akihiko Iwata , Hiroshi Ito , Hirofumi Akagi , Hideaki Fujita , Takushi Jimichi
IPC分类号： H02M7/5387
CPC分类号： H02J3/383 , H02M7/49 , H02M7/53875 , Y02E10/563
摘要： A three-phase inverter circuit (4) of which DC portion is smoothing capacitors (3) connected between output terminals of a solar battery (1) and single-phase inverters (5a-5c) connected in series with AC output lines of the three-phase inverter circuit (4) together constitute an inverter section, and this inverter section is connected to a three-phase power system (2). The three-phase inverter circuit (4) outputs a reverse-polarity voltage pulse (10ua) during a period within each of basic voltage pulses of which pulsewidth corresponds to a half cycle every half cycle of a system voltage. A power burden born by the individual single-phase inverters (5a-5c) in each half cycle is made approximately zero and the individual single-phase inverters (5a-5c) make a correction for subtracting a common voltage (Vo) from target output voltages of individual phases during the period when the reverse-polarity voltage pulse (10ua) is generated.
摘要翻译：一个三相逆变器电路（4），其直流部分是连接在太阳能电池（1）的输出端和与三相交流输出线串联的单相逆变器（5a-5c）之间的平滑电容器（3）相位逆变器电路（4）共同构成逆变器部分，该逆变器部分连接到三相电力系统（2）。三相逆变器电路（4）在脉冲宽度对应于系统电压的每半个周期的半周期的每个基本电压脉冲期间的周期期间输出反极性电压脉冲（10ua）。在每个半周期内由各个单相逆变器（5a-5c）产生的电力负担大致为零，并且各个单相逆变器（5a-5c）进行从目标输出中减去公共电压（Vo）的校正在产生反极性电压脉冲（10ua）的期间，各相的电压。

29. 发明授权

US07638726B2 Wire electric discharge machining apparatus and wire electric discharge machining method 有权
标题翻译：线放电加工装置及线放电加工方法
公开(公告)号：US07638726B2
公开(公告)日：2009-12-29
申请号：US11665683
申请日：2006-04-05
申请人： Takashi Hashimoto , Tatsushi Satou , Akihiko Iwata , Yoshikazu Ukai , Yasuo Onodera
发明人： Takashi Hashimoto , Tatsushi Satou , Akihiko Iwata , Yoshikazu Ukai , Yasuo Onodera
IPC分类号： B23H7/02 , B23H7/20
CPC分类号： B23H7/04 , B23H1/022
摘要： A discharge-generation control unit applies at least a preliminary-discharge voltage pulse and a main-discharge voltage pulse between a wire electrode and a work. A discharge-position determining unit determines a discharge position from results of measurement by a plurality of current measuring units. A machining-energy adjusting unit adjusts machining energy generated by the main-discharge voltage pulse based on a discharge position determined before applying the main-discharge voltage pulse, and reflects a result of the adjustment on the generation of an electric discharge by feeding the result to the discharge-generation control unit.
摘要翻译：放电产生控制单元在线电极和工件之间至少施加预放电电压脉冲和主放电电压脉冲。放电位置确定单元通过多个电流测量单元从测量结果确定放电位置。加工能量调节单元基于在施加主放电电压脉冲之前确定的放电位置来调整由主放电电压脉冲产生的加工能量，并且通过馈送结果来反映对放电产生的调整结果到放电产生控制单元。

30. 发明申请

US20090261793A1 DC/DC POWER CONVERTING APPARATUS 有权
标题翻译：直流/直流电源转换装置
公开(公告)号：US20090261793A1
公开(公告)日：2009-10-22
申请号：US12439829
申请日：2007-05-31
申请人： Takahiro Urakabe , Matahiko Ikeda , Akihiko Iwata , Kiyoharu Anzai , Hirotoshi Maekawa , Toshiyuki Kikunaga , Masaru Kobayashi , Tatsuya Okuda
发明人： Takahiro Urakabe , Matahiko Ikeda , Akihiko Iwata , Kiyoharu Anzai , Hirotoshi Maekawa , Toshiyuki Kikunaga , Masaru Kobayashi , Tatsuya Okuda
IPC分类号： G05F1/10
CPC分类号： H02J7/0016 , H02M3/158 , H02M2001/0077
摘要： Three or more circuits, in which series-connected low-voltage and high-voltage side switches including MOSFETs including parasitic diodes are connected across positive and negative terminals of each of smoothing capacitors, are connected in series. One of elementary series circuits, each including a capacitor and an inductor, is disposed between any adjacent two of the circuits with the elementary series circuits set to have the same period of resonance. The MOSFETs of rectifier circuits are brought into an ON state simultaneously with the MOSFETs of a driving inverter circuit and brought into an OFF state earlier than the MOSFETs of the driving inverter circuit by a period of time not exceeding a time period equal to (period of resonance)/2. A resonance phenomenon of the capacitor and the inductor is used and conduction loss in the rectifier circuits is reduced in DC/DC power conversion performed through charging and discharging operation of the capacitor.
摘要翻译：将包括寄生二极管在内的串联连接的低压侧和高压侧开关的三个以上的电路串联连接在各平滑电容器的正端子和负极端子之间。每个包括电容器和电感器的基本串联电路之一被布置在任何相邻的两个电路之间，其中基本串联电路被设置为具有相同的谐振周期。整流电路的MOSFET与驱动逆变器电路的MOSFET同时处于导通状态，比驱动用逆变器电路的MOSFET低一段时间，不超过等于（时间段共振）/ 2。使用电容器和电感器的共振现象，并且通过电容器的充放电操作进行的DC / DC功率转换，整流电路的导通损耗降低。

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