公开(公告)号：US20150280612A1

公开(公告)日：2015-10-01

申请号：US14663460

申请日：2015-03-20

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Kozo IDE ,  Tetsumi NARITA ,  Seiji FUJISAKI ,  Mamoru TAKAKI ,  Shinya MORIMOTO

IPC: H02M7/5387

CPC classification number: H02M7/53871 ,  H02J3/385 ,  H02M3/156 ,  H02M7/5395 ,  H02M2001/0025 ,  H02M2001/007 ,  Y02E10/58

Abstract: A power converter according to embodiments includes a boost circuit, a single-phase inverter, a current controller, and a power conversion controller. The current controller generates a voltage reference based on a difference between current output from the single-phase inverter and a current reference. The power conversion controller controls the single-phase inverter to generate a first portion of the AC voltage, and controls the boost circuit to generate a second portion of the AC voltage. The first portion corresponds to the voltage reference of which an absolute value is smaller than the voltage of the DC power supply. The second portion corresponds to the voltage reference of which an absolute value is greater than the voltage of the DC power supply.

Abstract translation: 根据实施例的功率转换器包括升压电路，单相逆变器，电流控制器和电力转换控制器。 电流控制器基于来自单相逆变器的电流输出与电流基准之间的差异产生电压基准。 电力转换控制器控制单相逆变器以产生交流电压的第一部分，并且控制升压电路以产生交流电压的第二部分。 第一部分对应于绝对值小于直流电源的电压的基准电压。 第二部分对应于绝对值大于直流电源的电压的参考电压。

公开(公告)号：US20150244287A1

公开(公告)日：2015-08-27

申请号：US14700084

申请日：2015-04-29

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Tetsumi NARITA ,  Masato HIGUCHI ,  Yasuhiko KAWANAMI ,  Hidenori HARA ,  Takamitsu KATSUKI

IPC: H02M7/537

CPC classification number: H02M7/537 ,  H02M3/158 ,  H02M7/53871 ,  H02M7/5395 ,  H02M2001/0054 ,  H02M2001/007 ,  Y02B70/1491

Abstract: A controller of a power conversion apparatus according to an embodiment causes a chopper and an inverter to generate an alternating-current (AC) voltage including first and second parts of an AC voltage waveform and causes the inverter to output the AC voltage. The chopper generates the first part having an absolute value higher than a voltage of a DC power supply, and the inverter generates the second part having an absolute value lower than the voltage of the DC power supply. The controller is configured to alternately turn on the first and second switching elements in a period during which the controller controls the chopper to generate the first part of the AC voltage waveform.

Abstract translation: 根据实施例的电力转换装置的控制器使得斩波器和逆变器产生包括交流电压波形的第一和第二部分的交流（AC）电压，并使逆变器输出交流电压。 斩波器产生具有比直流电源的电压高的绝对值的第一部分，并且逆变器产生具有比直流电源的电压低的绝对值的第二部分。 控制器被配置为在控制器控制斩波器以产生交流电压波形的第一部分的周期期间交替地接通第一和第二开关元件。

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.

公开(公告)号：US20150124503A1

公开(公告)日：2015-05-07

申请号：US14596221

申请日：2015-01-14

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Tetsumi NARITA ,  Katsutoshi YAMANAKA

IPC: H02M7/797

CPC classification number: H02M7/797 ,  H02M7/48

Abstract: A power converter according to an embodiment includes a power conversion unit and a controller. The power conversion unit includes a plurality of first bidirectional switches that are disposed between a plurality of DC side terminals and a plurality of AC side terminals, and a second bidirectional switch and a reactor that are disposed between the AC side terminals. The controller keeps the second bidirectional switch ON in any one or both of a free-wheeling mode in a step-down power conversion from DC power into AC power, and an energy storing mode in which electric energy is stored in the reactor in a step-up power conversion from the AC power to the DC power.

Abstract translation: 根据实施例的功率转换器包括功率转换单元和控制器。 功率转换单元包括设置在多个DC侧端子和多个AC侧端子之间的多个第一双向开关，以及设置在AC侧端子之间的第二双向开关和电抗器。 控制器在从DC功率到DC电力的降压功率转换中的续流模式中的任一个或两个中保持第二双向开关接通，并且在步骤中电能存储在电抗器中的能量存储模式 - 从AC电源到DC电源的电源转换。