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公开(公告)号：EP2871764A3
公开(公告)日：2015-08-19
申请号：EP14192231.0
申请日：2014-11-07
申请人： Hitachi, Ltd.
CPC分类号： H02M7/483 , H02J3/1857 , H02J3/32 , H02M2007/4835 , Y02E40/26
摘要： A power conversion device (1, 1A, 1B), which limits a zero-phase current without using a reactor, includes clusters (12uv, 12vw, and 12wu) in each of which six unit cells (121) are connected in series; and a transformer (11) that has legs (113uv, 113vw, 113wu) on each of which a primary winding (111uv, 111vw, 111wu) and a secondary winding (112uv, 112vw, 112wu) are wound for magnetic coupling. The both ends of the secondary winding (112uv, 112vw, 112wu) are connected to the both ends of the cluster (12uv, 12vw, 12wu).
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2.发明公开Switching element, power converter, direct current transmission system, current control device, method of controlling power converter, and method of controlling current in voltage source converter 审中-公开开关元件，电源转换器，直流电力传输系统，电力控制装置，用于控制功率转换器的方法，和用于控制在电压型逆变器中的电流的方法
公开(公告)号：EP2645552A2
公开(公告)日：2013-10-02
申请号：EP13154544.4
申请日：2013-02-08
申请人： Hitachi, Ltd.
发明人： Yamamoto, Takayoshi , Ichinose, Masaya , Bando, Akira , Yamashita, Keiichi , Inoue, Shigenori , Yoshihara, Toru , Eguchi, Yoshio , Sakuchi, Osamu , Katoh, Shuji , Ito, Tomomichi
IPC分类号： H02M1/096 , H02M7/219 , H02M5/458 , H02M7/5387
CPC分类号： H02M7/12 , H02M1/08 , H02M7/217 , H02M7/48 , H02M7/483 , H02M2001/0006 , H02M2007/4835
摘要： Problem to be Solved
A switching element of a power converter generates a low voltage, using a current flowing in the power converter, and supplies a power to drive itself.
Solution
A switching element 108 of a power converter for conversion from direct current into alternate current or from alternate current into direct current includes: a terminal 208 and a terminal 209 which are used in building the switching element 108 itself in the power converter; a capacitor 203, a high-side controllable switch 201H and a low-side controllable switch 201L enabling outputting the voltage of the capacitor 203, the voltage being output between the terminal 208 and the terminal 209, and a self-supply power source 206 for supplying a power to drive the bi-directional chopper switching element 108 itself, using a current flowing in the capacitor 203.-
公开(公告)号：EP0767500A2
公开(公告)日：1997-04-09
申请号：EP96115659.3
申请日：1996-09-30
申请人： HITACHI, LTD.
发明人： Ishikawa, Katsumi , Saito, Katsuaki , Sato, Yutaka , Watanabe, Atsuo , Katoh, Shuji , Momma, Naohiro
CPC分类号： H01L29/74 , H01L29/32 , H01L29/861 , Y10S257/913
摘要： In a semiconductor device such as a diode and thyristor having at least one pn junction between a pair of main surfaces, a first main electrode (31, 33) formed on the surface of one of the main surfaces and a second main electrode (32, 34) formed on the surface of the other one of the main surfaces, a semiconductor lattice defect is formed such that its lattice defect density increases gradually in the direction from the first main electrode (31, 33) to the second main electrode (32, 34). Since the distribution of carrier density in conduction state can be flattened according to the invention, the reverse recovery charge can be reduced substantially without causing ON-state voltage to increase.
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公开(公告)号：EP2645552B1
公开(公告)日：2020-04-22
申请号：EP13154544.4
申请日：2013-02-08
申请人： Hitachi, Ltd.
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公开(公告)号：EP2509207A3
公开(公告)日：2015-09-16
申请号：EP12002421.1
申请日：2012-04-03
申请人： Hitachi, Ltd.
CPC分类号： H02M5/4585 , H02M1/14 , Y02B70/145
摘要： A power conversion system (10) suppresses condensers (3) from breaking down owing to thermal runaway. A resonance frequency f decided by parasitic inductance (6) of condensers (3) and capacitance of the condensers (3) changed in response to use temperature of the condensers (3) and/or DC voltage applied to the condensers (3) is set to fall within a range of mfc+Δf≦f≦(m+1)fc-Δf, where fc is a carrier frequency for driving at least one of switching elements (SW1 to SW6) of the first power converter (2) and switching elements (SW7 to SW12) of the second power converter (4), Δf a predetermined frequency and m a positive integer.
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6.发明公开Power conversion apparatus and electrical-mechanical energy conversion system 审中-公开电力变换装置和电 - 机械能量转换系统
公开(公告)号：EP2822168A3
公开(公告)日：2015-08-19
申请号：EP14175047.1
申请日：2014-06-30
申请人： Hitachi, Ltd.
发明人： Inoue, Shigenori , Katoh, Shuji , Kawazoe, Hironari , Tomobe, Osamu , Yoshihara, Toru , Watanabe, Kenta
IPC分类号： H02M7/483
CPC分类号： H02P6/14 , H02M7/483 , H02M2007/4835 , H02P25/16 , H02P27/04
摘要： A power conversion apparatus (102) includes arms (104) in each of which one or more unit converters (105) each including a capacitor (203) and capable of outputting an arbitrary voltage are connected in series, and a point P as a first node to which one ends of the respective arms (104) are Y-connected, and a point N as a second node to which a neutral terminal of the rotary electric machine (103) is connected. The other ends of the respective arms are connected to one ends of respective phase windings of a rotary electric machine.
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公开(公告)号：EP2871764B1
公开(公告)日：2018-06-27
申请号：EP14192231.0
申请日：2014-11-07
申请人： Hitachi, Ltd.
CPC分类号： H02M7/483 , H02J3/1857 , H02J3/32 , H02M2007/4835 , Y02E40/26
摘要： A power conversion device (1, 1A, 1B), which limits a zero-phase current without using a reactor, includes clusters (12uv, 12vw, and 12wu) in each of which six unit cells (121) are connected in series; and a transformer (11) that has legs (113uv, 113vw, 113wu) on each of which a primary winding (111uv, 111vw, 111wu) and a secondary winding (112uv, 112vw, 112wu) are wound for magnetic coupling. The both ends of the secondary winding (112uv, 112vw, 112wu) are connected to the both ends of the cluster (12uv, 12vw, 12wu).
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公开(公告)号：EP2602927B1
公开(公告)日：2018-02-21
申请号：EP12008135.1
申请日：2012-12-05
申请人： Hitachi, Ltd.
发明人： Inoue, Shigenori , Katoh, Shuji
CPC分类号： H02M7/10 , H02M1/32 , H02M7/483 , H02M2001/0003 , H02M2001/0064 , H02M2007/4835
摘要： A power conversion device (102) includes at least two legs (104R, 104S, 104T) connected in parallel each of which includes at least two unit converters (106RPc, 106RPf) connected in series, wherein at least one of the legs is formed using at least two kinds of unit converters including a first type unit converter capable of outputting a unipolar voltage and a second type unit converter capable of outputting a bipolar voltage.
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公开(公告)号：EP2728722A2
公开(公告)日：2014-05-07
申请号：EP13181750.4
申请日：2013-08-27
申请人： Hitachi Ltd.
发明人： Inoue, Shigenori , Katoh, Shuji , Bando, Akira , Kiyofuji, Yasuhiro , Eguchi, Yoshio , Ichinose, Masaya , Yamamoto, Takayoshi
IPC分类号： H02M1/00
CPC分类号： H02M7/2173 , H02M5/10 , H02M5/4585 , H02M7/483 , H02M7/5388 , H02M2007/4835
摘要： In the present invention, provided is a power conversion apparatus (102) in which at least one energy storage element and at least one switching element are included, a plurality of series circuits of a transformer winding and an arm (104U, 104V, 104W) in which one or a plurality of at least two-terminal unit converters (105) which depend on ON/OFF of the switching element and supply a zero voltage or a voltage depending on a voltage of the energy storage element are connected in series are connected in parallel, and a multi-phase power source or a multi-phase load is connected to another winding of the transformer (103), and the parallel-connection point is set as a DC terminal, and which includes means (106) for controlling a current flowing through each of the arms (104U, 104V, 104W) to have a phase and amplitude different from each other.
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公开(公告)号：EP2509207A2
公开(公告)日：2012-10-10
申请号：EP12002421.1
申请日：2012-04-03
申请人： Hitachi, Ltd.
IPC分类号： H02M5/458
CPC分类号： H02M5/4585 , H02M1/14 , Y02B70/145
摘要： A power conversion system (10) suppresses condensers (3) from breaking down owing to thermal runaway. A resonance frequency f decided by parasitic inductance (6) of condensers (3) and capacitance of the condensers (3) changed in response to use temperature of the condensers (3) and/or DC voltage applied to the condensers (3) is set to fall within a range of mfc+Δf≦f≦(m+1)fc-Δf, where fc is a carrier frequency for driving at least one of switching elements (SW1 to SW6) of the first power converter (2) and switching elements (SW7 to SW12) of the second power converter (4), Δf a predetermined frequency and m a positive integer.
摘要翻译： 电力转换系统（10）抑制冷凝器（3）由于热失控而分解。 设定由冷凝器（3）的使用温度和/或施加到电容器（3）的直流电压而变化的冷凝器（3）的寄生电感（6）和电容器（3）的电容决定的谐振频率f 落在mfc +“f‰| f‰|（m + 1）fc-”f的范围内，其中fc是用于驱动第一功率转换器（2）的开关元件（SW1至SW6）中的至少一个的载波频率 ）和第二功率转换器（4）的开关元件（SW7至SW12），“fa预定频率和ma正整数”。
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