公开(公告)号：US20220278626A1

公开(公告)日：2022-09-01

申请号：US17679084

申请日：2022-02-24

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Keisei INOKI ,  Takahiro SAEKI ,  Toshihiro HANADA ,  Kengo NAKAHARA ,  Hideaki IURA

IPC: H02M5/458 ,  H02P21/22 ,  H02P27/04

Abstract: The power conversion device may include: power conversion circuitry configured to perform a power conversion for outputting a driving power to an induction motor; and control circuitry. The control circuitry may be configured to: receive a master command phase from a master power conversion device; generate a voltage command having a command phase in a rotating coordinate system based on a torque target value, wherein a rotating magnetic field for driving a rotor of the induction motor is generated to rotate with the rotating coordinate system; calculate a rotation phase of the rotating coordinate system based on a command phase difference between the master command phase and the command phase to reduce the command phase difference; and control the power conversion circuitry to output the driving power to the induction motor, in synchronization with the master power conversion device, based on the rotation phase and the voltage command.

公开(公告)号：US20170237376A1

公开(公告)日：2017-08-17

申请号：US15429810

申请日：2017-02-10

Applicant: Kabushiki Kaisha Yaskawa Denki

Inventor： Takahiro SAEKI

IPC: H02P21/34 ,  H02P6/14 ,  H02P27/08

CPC classification number: H02P21/34 ,  H02P6/14 ,  H02P21/18 ,  H02P21/24 ,  H02P27/047 ,  H02P27/08

Abstract: A motor controller includes an inverter including circuitry which supplies power to a motor, and a controller including circuitry which controls the inverter such that the circuitry of the inverter supplies an AC current to a first axis of a stationary orthogonal coordinate system in the motor while changing a frequency of the AC current. The first axis has a predetermined phase relationship with a phase voltage of the motor.

公开(公告)号：US20220224268A1

公开(公告)日：2022-07-14

申请号：US17648062

申请日：2022-01-14

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Takahiro SAEKI ,  Shingo FUKUMARU

IPC: H02P23/14

Abstract: A control device which includes a power conversion circuit configured to supply driving power to an electric motor, a magnetic flux estimation circuit configured to estimate a primary magnetic flux of the motor, and a voltage command generation circuit (control circuit) configured to control the conversion circuit based on an estimation result of the primary magnetic flux, in which the estimation circuit performs, when an operating speed of the motor is less than a predetermined level, a first estimation of estimating the primary magnetic flux based on an output current to the motor and an inductance thereof, and performs, when the speed exceeds a predetermined level, a second estimation of estimating the primary magnetic flux by estimating a magnetic flux differential value based on an output voltage of the conversion circuit and integrating the value using, as an initial value, an estimation result by the first estimation.

公开(公告)号：US20240396483A1

公开(公告)日：2024-11-28

申请号：US18672013

申请日：2024-05-23

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Yoshiyasu TAKASE ,  Akira YAMAZAKI ,  Yasumasa HAMABE ,  Takahiro SAEKI

IPC: H02P23/30 ,  H02P21/00 ,  H02P21/14 ,  H02P21/18 ,  H02P23/20

Abstract: A power conversion device includes: power conversion circuitry configured to supply drive power to an induction motor; and control circuitry configured to: generate a torque command; correct the torque command, in response to determining that a magnitude of a primary frequency of the induction motor is less than a lower limit level, so that the magnitude of the primary frequency approaches the lower limit level; and control the power conversion circuitry to supply the drive power so that the induction motor generates a torque corresponding to the torque command.

公开(公告)号：US20150280549A1

公开(公告)日：2015-10-01

申请号：US14564090

申请日：2014-12-09

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Hirofumi KINOMURA ,  Takahiro SAEKI

IPC: H02M1/42

CPC classification number: H02M1/4216 ,  H02M1/126 ,  H02M5/273 ,  H02M5/297 ,  H02M2001/0025 ,  H02M2005/2932 ,  Y02B70/126

Abstract: A power conversion apparatus includes a power converter, an LC filter, and a controller. The power converter is disposed between an AC power source and a load. The LC filter is disposed between the AC power source and the power converter. The controller controls the power converter to perform power conversion control between the AC power source and the load. The controller includes a command generator, an oscillation component acquirer, a regulator, and an actuator. The command generator generates an input current command including a command of an input current of the power converter. The oscillation component acquirer acquires an oscillation component of a current flowing through a capacitor of the LC filter. The regulator regulates the input current command based on the oscillation component acquired by the oscillation component acquirer. The actuator controls the power converter based on the input current command regulated by the regulator.

Abstract translation: 功率转换装置包括功率转换器，LC滤波器和控制器。 电力转换器设置在交流电源和负载之间。 LC滤波器设置在AC电源和功率转换器之间。 控制器控制电源转换器在交流电源和负载之间执行电源转换控制。 控制器包括命令发生器，振荡元件获取器，调节器和致动器。 命令发生器产生包括功率转换器的输入电流的命令的输入电流指令。 振荡分量获取器获取流过LC滤波器的电容器的电流的振荡分量。 调节器根据由振荡分量获取器获取的振荡分量来调节输入电流指令。 执行器根据由调节器调节的输入电流指令控制功率转换器。

公开(公告)号：US20150188478A1

公开(公告)日：2015-07-02

申请号：US14556244

申请日：2014-12-01

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Takahiro SAEKI

IPC: H02P25/02 ,  H02P27/08

CPC classification number: H02P25/02 ,  H02M5/458 ,  H02M7/493 ,  H02M2001/0025 ,  H02M2001/008 ,  H02P5/74 ,  H02P27/08 ,  H02P29/025 ,  H02P31/00

Abstract: A motor control system includes a plurality of motors, a plurality of inverters, and a controller. The plurality of inverters are configured to drive the plurality of respective motors and are coupled to a common bus line through which DC power is supplied. When power supply is interrupted, the controller is configured to calculate a frequency command value so as to maintain a bus line voltage across the common bus line and configured to supply the frequency command value to the plurality of inverters.

Abstract translation: 电动机控制系统包括多个电动机，多个逆变器和控制器。 多个逆变器被配置为驱动多个相应的电动机，并且耦合到通过其供应DC电力的公共总线。 当电源中断时，控制器被配置为计算频率指令值，以便在公共总线上保持总线电压并且被配置为向多个逆变器提供频率指令值。

公开(公告)号：US20240162799A1

公开(公告)日：2024-05-16

申请号：US18551127

申请日：2021-03-23

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Kazumasa IKEDA ,  Takahiro SAEKI

IPC: H02M1/00 ,  H02P21/22 ,  H02P27/08

CPC classification number: H02M1/0009 ,  H02M1/0012 ,  H02P21/22 ,  H02P27/085

Abstract: To provide an electric power conversion device that carries out high-speed transmission of current values of a plurality of inverters, and a control method for the electric power conversion device. The electric power conversion device includes a main controller, a plurality of subcontrollers, and a relay unit. The main controller generates and outputs a control command that is a target value for controlling electric power conversion carried out by a plurality of electric power conversion units that supply and receive power to and from a load based on state quantity information related to a state quantity of each of the plurality of electric power conversion units. The subcontrollers are provided for each of the electric power conversion units to control the electric power conversion units based on the control command and to acquire and output the state quantities. The relay unit compresses information of the state quantities output from of subcontrollers.

公开(公告)号：US20150200616A1

公开(公告)日：2015-07-16

申请号：US14557452

申请日：2014-12-02

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Takahiro SAEKI ,  Hideaki IURA

IPC: H02P21/14

CPC classification number: H02P21/18 ,  H02P1/029 ,  H02P1/26 ,  H02P27/047 ,  H02P29/025

Abstract: A motor controller includes an evaluation value calculator and an evaluation value searcher. The evaluation value calculator calculates an evaluation value represented by a function including a q-axis current value of a torque current component of a current through an induction motor. The evaluation value has a first sign among a positive sign and a negative sign when a rotational speed of the induction motor is greater than a frequency of a voltage applied to the induction motor by a predetermined amount, and has a second sign when the rotational speed is smaller than the frequency by the predetermined amount. The evaluation value searcher performs an evaluation value search to increase or decrease the frequency based on whether the evaluation value has the positive or negative sign so as to make the frequency close to the rotational speed of the induction motor in a free run state.

Abstract translation: 电机控制器包括评估值计算器和评估值搜索器。 评估值计算器计算由包括通过感应电动机的电流的转矩电流分量的q轴电流值的函数表示的评估值。 当感应电动机的转速大于施加到感应电动机的电压的频率预定量时，评估值具有正号和负号之间的第一符号，并且当转速 小于预定量的频率。 评估值搜索器基于评估值是否具有正或负符号来执行评估值搜索以增加或减少频率，以使频率接近感应电动机的转速处于自由运行状态。

公开(公告)号：US20130279214A1

公开(公告)日：2013-10-24

申请号：US13859732

申请日：2013-04-10

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Yoshiyasu TAKASE ,  Kozo IDE ,  Shinya MORIMOTO ,  Hideaki IURA ,  Takahiro SAEKI

IPC: H02M7/68 ,  H02M5/44

CPC classification number: H02M7/68 ,  H02M1/16 ,  H02M5/44 ,  H02M5/4585 ,  H02M7/219 ,  H02M7/797 ,  H02P9/04 ,  H02P21/50

Abstract: A power regenerative converter includes: a power conversion unit configured to convert AC power supplied from an AC power supply into DC power and convert DC power into AC power to be supplied as regenerative electric power to the AC power supply supply; an LCL filter including a reactor unit having a plurality of reactors connected in series between the power conversion unit and the AC power supply, and capacitors each having one end connected to a series connection point of the reactors in the reactor unit; a drive control unit for controlling the power conversion unit based on an AC voltage command; and a voltage command compensation unit for calculating a compensation value in accordance with a capacitor voltage being a voltage at the series connection point of the reactors and adding the compensation value to the AC voltage command input to the drive control unit.

Abstract translation: 一种电力再生转换器，包括：电力转换单元，被配置为将从AC电源提供的AC电力转换为DC电力，并将DC电力转换为作为再生电力供给到AC电源的AC电力; LCL滤波器，包括具有串联连接在功率转换单元和AC电源之间的多个电抗器的电抗器单元，以及各自具有连接到电抗器单元中的电抗器的串联连接点的电容器; 驱动控制单元，用于基于AC电压命令来控制所述电力转换单元; 以及电压指令补偿单元，用于根据电抗器的串联连接点处的电压的电容器电压来计算补偿值，并将补偿值与输入到驱动控制单元的AC电压指令相加。

公开(公告)号：US20130279213A1

公开(公告)日：2013-10-24

申请号：US13858949

申请日：2013-04-09

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Takahiro SAEKI ,  Hideaki IURA ,  Shoji KONAKAHARA

IPC: H02M7/68 ,  H02M5/04

CPC classification number: H02M7/68 ,  H02M5/04 ,  H02M5/4585 ,  H02M7/797 ,  H02P21/36

Abstract: A power regeneration apparatus includes a power conversion unit, an AC reactor, a voltage detecting unit, a phase detecting unit, a drive control unit for controlling the power conversion unit based on a phase detection value, and a reactive current component detecting unit. The phase detecting unit detects the phase of the AC power supply. The reactive current component detecting unit detects a reactive current component of a current. The drive control unit includes a phase correction section. The phase correction section corrects the phase detection value based on the reactive current component.

Abstract translation: 电力再生装置包括功率转换单元，交流电抗器，电压检测单元，相位检测单元，用于基于相位检测值控制功率转换单元的驱动控制单元和无功电流分量检测单元。 相位检测单元检测交流电源的相位。 无功电流分量检测单元检测电流的无功电流分量。 驱动控制单元包括相位校正部。 相位校正部根据无功电流分量来校正相位检测值。