公开(公告)号：US20140319920A1

公开(公告)日：2014-10-30

申请号：US14259154

申请日：2014-04-23

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Takashi KUBOYAMA ,  Sadao ISHII ,  Hirotaka TOUJINBARA ,  Tadashi SADOHARA

IPC: H02J3/38

CPC classification number: H02J3/385 ,  Y02E10/58 ,  Y10T307/707

Abstract: A grid interconnection apparatus includes a voltage conversion section including DC/DC converters to step up or down output voltages of DC power sources. The voltage conversion section combines DC power outputs from the DC/DC converters into combined DC power and output the DC power. A power conversion section converts the DC power output from the voltage conversion section into AC power, and outputs the AC power to a power grid. A current detector detects a current input into the power conversion section. A voltage detector detects a voltage input into the power conversion section. A controller controls the DC/DC converters to maximize the power outputs from the DC power sources based on the detected current and the detected voltage.

Abstract translation: 电网互连装置包括电压转换部分，其包括用于升压或降低直流电源的输出电压的DC / DC转换器。 电压转换部分将DC / DC转换器的直流电源输出组合成直流电，并输出直流电源。 电力转换部将从电压变换部输出的直流电力转换为交流电力，将交流电力输出到电网。 电流检测器检测到电力转换部分的电流输入。 电压检测器检测输入到电力转换部分的电压。 控制器控制DC / DC转换器，以根据检测到的电流和检测到的电压最大化来自直流电源的功率输出。

公开(公告)号：US20150070952A1

公开(公告)日：2015-03-12

申请号：US14541029

申请日：2014-11-13

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Sadao ISHII ,  Katsutoshi YAMANAKA ,  Tsuyoshi HIGUCHI ,  Takashi KUBOYAMA ,  Yutaro IHARA

IPC: H02M7/219 ,  H02M7/48

CPC classification number: H02M7/219 ,  H02M5/272 ,  H02M7/48 ,  H02M7/5395 ,  H02M7/797 ,  H02M2001/123

Abstract: An electric power converter according to an embodiment includes a switching unit, a controller, and a second bidirectional switch. The switching unit includes a plurality of first bidirectional switches disposed between a DC power source and an AC load or between a DC load and an AC power source. The controller controls the switching unit to perform power conversion between DC power and AC power. When turning off the second bidirectional switch disposed on a path between one pole of the DC power source or the DC load and the switching unit, the controller turns on the first bidirectional switch connected between the other pole of the DC power source and the AC load or between the other pole of the DC load and the AC power source.

Abstract translation: 根据实施例的电力转换器包括切换单元，控制器和第二双向开关。 开关单元包括设置在DC电源和AC负载之间或者在DC负载和AC电源之间的多个第一双向开关。 控制器控制开关单元在直流电源和交流电之间进行电源转换。 当关闭设置在直流电源的一极或直流负载之间的路径上的第二双向开关和开关单元时，控制器接通连接在直流电源的另一极和交流负载之间的第一双向开关 或直流负载的另一极与交流电源之间。

公开(公告)号：US20170207698A1

公开(公告)日：2017-07-20

申请号：US15473880

申请日：2017-03-30

Applicant: Kabushiki Kaisha Yaskawa Denki

Inventor： Takashi KUBOYAMA ,  Sadao ISHll

IPC: H02M3/07 ,  H02M7/537 ,  G01R19/04 ,  H02M1/08

Abstract: A power converting device includes power conversion circuitry connected to a power system, voltage amplitude determination circuitry that determines a voltage amplitude of the power system, and control circuitry that controls an output current from the power conversion circuitry to the power system based on an oscillation component of the voltage amplitude determined by the voltage amplitude determination circuitry.

公开(公告)号：US20170187297A1

公开(公告)日：2017-06-29

申请号：US15384840

申请日：2016-12-20

Applicant: Kabushiki Kaisha Yaskawa Denki

Inventor： Tetsumi NARITA ,  Sadao ISHII ,  Takashi KUBOYAMA ,  Shinsuke KAJIWARA

IPC: H02M3/335 ,  H02M1/36 ,  H02M1/08

CPC classification number: H02M3/3376 ,  H02M3/33584 ,  H02M2001/0009 ,  H02M2001/0048 ,  Y02B70/1491

Abstract: A power conversion device includes a switching circuit and a switch driver. The switching circuit includes a plurality of switching elements including a first switching element and a second switching element that are electrically coupled in series. The switch driver includes a first, a second, and a third switching pattern controller. The first switching pattern controller executes a first switching pattern which is set such that a current in a reverse direction flows through the first switching element and the second switching element is off. The second switching pattern controller executes a second switching pattern which is set such that a direction of the current flowing through the first switching element is switched to a forward direction from the reverse direction. The third switching pattern controller executes a third switching pattern which is set such that the first switching element is off and the second switching element is on.