公开(公告)号：US06630641B2

公开(公告)日：2003-10-07

申请号：US09848344

申请日：2001-05-04

申请人： Taichiro Tamida ,  Takashi Hashimoto ,  Akihiro Suzuki ,  Akihiko Iwata ,  Atsushi Taneda

发明人： Taichiro Tamida ,  Takashi Hashimoto ,  Akihiro Suzuki ,  Akihiko Iwata ,  Atsushi Taneda

IPC分类号： B23H102

CPC分类号： B23H1/022 ,  B23H2300/20

摘要： An electric discharge machining apparatus includes a wire electrode for machining a workpiece, and a first voltage applying unit for applying a voltage pulse. The voltage pulse has a rise time longer than a discharge formative time lag when a rectangular voltage pulse is applied, when a distance between the workpiece and the wire is an average value in machining, and rises to the same voltage as the rectangular voltage pulse.

摘要翻译： 放电加工装置包括用于加工工件的线电极和用于施加电压脉冲的第一施加电压单元。 当施加矩形电压脉冲时，当工件和线之间的距离是加工中的平均值时，电压脉冲具有比放电形成时滞更长的上升时间，并且上升到与矩形电压脉冲相同的电压。

公开(公告)号：US5122674A

公开(公告)日：1992-06-16

申请号：US621999

申请日：1990-12-04

申请人： Hiroshi Itou ,  Akihiko Iwata ,  Tatsuki Okamoto ,  Yoshihiro Ueda ,  Shinji Murata ,  Takashi Kumagai ,  Yoichiro Tabata

发明人： Hiroshi Itou ,  Akihiko Iwata ,  Tatsuki Okamoto ,  Yoshihiro Ueda ,  Shinji Murata ,  Takashi Kumagai ,  Yoichiro Tabata

IPC分类号： H01S3/03 ,  H03K3/57 ,  H03K17/10 ,  H03K17/12

CPC分类号： H03K3/57 ,  H01S3/031 ,  H03K17/102 ,  H03K17/122 ,  H03K17/127 ,  Y10T307/747

摘要： In a pulse generator circuit for a laser unit etc., plural semiconductor switches arranged in matrix alignment on an outer surface of a first tube are connected in series and parallel with one another, and an end of each series-connection of the semiconductor switches is electrically connected to a second tube provided in coaxial alignment to the first tube, thereby realizing a synthetic semiconductor switch for switching high voltage and large current between the other end of the series-connection of the semiconductor switches and the second tube.

公开(公告)号：US4890294A

公开(公告)日：1989-12-26

申请号：US147726

申请日：1988-01-25

申请人： Junichi Nishimae ,  Kenji Yoshizawa ,  Masakazu Taki ,  Yoshihiro Ueda ,  Tadashi Yanagi ,  Akihiko Iwata

发明人： Junichi Nishimae ,  Kenji Yoshizawa ,  Masakazu Taki ,  Yoshihiro Ueda ,  Tadashi Yanagi ,  Akihiko Iwata

IPC分类号： H01J37/32 ,  H01S3/03 ,  H01S3/0975 ,  H05H1/46

CPC分类号： H01J37/32192 ,  H01J37/32339 ,  H01S3/0315 ,  H01S3/0975 ,  H05H1/46

摘要： The invention relates to a plasma apparatus where plasma is generated utilizing microwave discharge and laser excitation is performed and plasma processing is performed. More specifically, in a plasma apparatus where a microwave from a microwave oscillator is transmitted through a microwave transmission path to a microwave circuit, and plasma is generated by a microwave discharge within the microwave circuit, a plasma generating medium for generating the plasma is filled in a space formed between a conductor wall constituting a part of the microwave circuit and a dielectric installed opposite to the conductor wall, and the microwave circuit forms microwave mode having an electric field component orthogonal to the boundary between the dielectric and the plasma.

摘要翻译： 本发明涉及一种使用微波放电产生等离子体并进行激光激发并进行等离子体处理的等离子体装置。 更具体地，在微波振荡器的微波通过微波传输路径传输到微波电路的等离子体装置中，并且通过微波电路内的微波放电产生等离子体，用于产生等离子体的等离子体产生介质被填充 在构成微波电路的一部分的导体壁与与导体壁相对设置的电介质之间形成的空间，微波电路形成具有与电介质和等离子体之间的边界正交的电场分量的微波模式。

公开(公告)号：US4665299A

公开(公告)日：1987-05-12

申请号：US780171

申请日：1985-09-26

申请人： Akihiko Iwata ,  Yoshiaki Katou ,  Masanori Mizuno

发明人： Akihiko Iwata ,  Yoshiaki Katou ,  Masanori Mizuno

IPC分类号： B23K9/073 ,  B23K9/10

CPC分类号： B23K9/0732 ,  B23K9/1056

摘要： An arc welding power source utilizing welding current from a two-step voltage conversion comprising a first target value setting circuit means for setting a first current target value V.sub.1 corresponding to a desired value of welding current, a current control circuit for controlling the welding current in accordance with the first current target value V.sub.1, a second target value setting circuit means for setting a second current target value V.sub.2 higher than the first current target value for satisfying a predetermined current waveform in response to an abrupt load variation, and a rapid operation current control circuit for controlling the welding current in accordance with the second current target value V.sub.2. Thus, even if the welding load tends to abruptly vary and the welding current tends to largely exceed the first current target value V.sub.1, the welding current is clipped by the second current target value V.sub.2 by the rapid operation current control circuit having a rapid response so as to maintain the actual welding current in the allowable V.sub.1 -V.sub.2 range.

摘要翻译： 一种电弧焊电源，其利用来自两级电压转换的焊接电流，包括用于设定与焊接电流的期望值相对应的第一电流目标值V1的第一目标值设定电路装置，用于控制焊接电流的电流控制电路 根据第一电流目标值V1，第二目标值设定电路装置，用于响应于突然的负载变化，设定高于第一电流目标值的第二电流目标值V2以满足预定电流波形，以及快速操作电流 控制电路，用于根据第二电流目标值V2控制焊接电流。 因此，即使焊接负载倾向于突然变化，焊接电流趋于大大超过第一电流目标值V1，则焊接电流被具有快速响应的快速操作电流控制电路所限制的第二电流目标值V2 以将实际焊接电流保持在允许的V1-V2范围内。

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。

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。

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。

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。

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。

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。