公开(公告)号：US20170272018A1

公开(公告)日：2017-09-21

申请号：US15461485

申请日：2017-03-17

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Shingo FUKUMARU ,  Keita SHIMAMOTO ,  Shinya MORIMOTO

IPC: H02P21/22 ,  H02P6/14 ,  H02P27/08

CPC classification number: H02P21/22 ,  H02M7/53873 ,  H02P6/14 ,  H02P27/08

Abstract: A rotation controller for an AC electric motor includes a space vector generator, a current change ratio obtainer, and a rotational angle calculator. The space vector generator generates at least a first magnetic field in a first direction and a second magnetic field in a second direction crossing the first direction in a rotation plane of a saliency-exhibiting rotor. The space vector generator synthesizes the first magnetic field and the second magnetic field into a synthesized magnetic field. The current change ratio obtainer acquires a first current change ratio of a first current generated in the first direction in a stator and a second current change ratio of a second current generated in the second direction in the stator. The rotational angle calculator calculates a rotational angle of the saliency-exhibiting rotor based on at least the first and second current change ratios and the first and second directions.

公开(公告)号：US20170272016A1

公开(公告)日：2017-09-21

申请号：US15461770

申请日：2017-03-17

Applicant: Kabushiki Kaisha Yaskawa Denki

Inventor： Shingo FUKUMARU ,  Hideaki IURA ,  Shinya MORIMOTO ,  Akira YAMAZAKI

IPC: H02P21/14 ,  H02M5/458 ,  H02P27/08

CPC classification number: H02P27/08 ,  H02M5/458 ,  H02P21/20

Abstract: A power conversion apparatus includes a power converter circuit that outputs an AC power to an electric motor, and circuitry that controls the power converter circuit to add a first change, accompanying a change of a power generated by the electric motor, to a first phase angle, which is a phase angle of a magnetic flux direction of the electric motor corresponding to the AC power, extracts a component generated by the first change from first information indicating the electric power supplied to the electric motor, and estimates the power generated by the electric motor based on the component.

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：US20160036364A1

公开(公告)日：2016-02-04

申请号：US14811788

申请日：2015-07-28

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Akira YAMAZAKI ,  Shingo FUKUMARU

IPC: H02P21/12

CPC classification number: H02P21/12 ,  H02P21/141

Abstract: A motor control device is provided, which includes a power converter for applying output voltage according to a voltage command to an electric motor, a magnetic flux estimator for estimating a vector of stator magnetic flux of the electric motor based on a difference between the output voltage and a voltage drop caused by a coil resistance of the electric motor, and a phase estimator for estimating a phase of the stator magnetic flux based on the vector of the stator magnetic flux estimated by the magnetic flux estimator. The magnetic flux estimator includes a variable low-pass filter for applying a low-pass filter to the difference at a cut-off frequency according to a frequency of the output voltage, and a phase adjuster for retarding at least one of an output phase of the variable low-pass filter and a phase of the difference before inputted into the variable low-pass filter.

Abstract translation: 提供了一种电动机控制装置，其包括：电力转换器，用于根据电动机的电压指令施加输出电压;磁通量估计器，用于基于输出电压之间的差值估计电动机的定子磁通矢量; 以及由电动机的线圈电阻引起的电压降，以及用于基于由磁通量估计器估计的定子磁通的矢量来估计定子磁通量的相位的相位估计器。 磁通量估计器包括可变低通滤波器，用于根据输出电压的频率将截止频率上的差施加低通滤波器，以及相位调节器，用于延迟至少一个输出相位 可变低通滤波器和输入到可变低通滤波器之前的差的相位。

公开(公告)号：US20240097595A1

公开(公告)日：2024-03-21

申请号：US18460227

申请日：2023-09-01

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Kentaro INOMATA ,  Akira YAMAZAKI ,  Takanori IWAKI ,  Joji EBISU ,  Shingo FUKUMARU

IPC: H02P27/08 ,  H02M7/483 ,  H02P25/022

CPC classification number: H02P27/08 ,  H02M7/483 ,  H02P25/022

Abstract: To provide a power conversion device that is effective for improving controllability of power in power conversion for multilevel voltage output. A power conversion device includes a switching circuit configured to supply a current to a motor by connecting and disconnecting a first point having a first potential, a second point having a second potential greater than the first potential, and a neutral point having a neutral potential between the first potential and the second potential to and from the motor, a neutral potential control unit configured to control the switching circuit in a manner to maintain the neutral potential within a target range, and a current control unit configured to increase a supply current to the motor without affecting a driving force generated by the motor at least when controlling the switching circuit 16 by the neutral potential control unit.

公开(公告)号：US20170063253A1

公开(公告)日：2017-03-02

申请号：US15252369

申请日：2016-08-31

Applicant: Kabushiki Kaisha Yaskawa Denki

Inventor： Shingo FUKUMARU ,  Shinya MORIMOTO ,  Hideaki IURA ,  Hirofumi KlNOMURA

IPC: H02M7/5387 ,  H02P21/13

CPC classification number: H02P21/13 ,  H02M7/5395 ,  H02M2001/0009 ,  H02M2001/0025 ,  H02M2007/53876 ,  H02P21/50 ,  H02P27/08

Abstract: A power conversion apparatus includes: a power converter that includes a plurality of switching elements; and a controller that controls the plurality of switching elements. The controller includes: a command generator that generates a voltage command vector; a synthesizer that synthesizes a correction vector with the voltage command vector to generate a synthetic vector; an adjuster that adjusts an output time of a plurality of voltage vectors from the power converter, the output time being corresponding to the synthetic vector; and a correction vector generator that generates the correction vector on the basis of an adjustment result of the adjuster.

Abstract translation: 一种电力转换装置，包括：功率转换器，包括多个开关元件; 以及控制多个开关元件的控制器。 控制器包括：产生电压指令矢量的指令发生器; 合成器，其将校正矢量与电压指令矢量合成以产生合成矢量; 调节器，其调整来自所述功率转换器的多个电压矢量的输出时间，所述输出时间对应于所述合成矢量; 以及校正矢量生成器，其基于调节器的调整结果生成校正矢量。

公开(公告)号：US20170063252A1

公开(公告)日：2017-03-02

申请号：US15252410

申请日：2016-08-31

Applicant: Kabushiki Kaisha Yaskawa Denki

Inventor： Shingo FUKUMARU ,  Shinya MORIMOTO ,  Hideaki IURA ,  Hirofumi KINOMURA

IPC: H02M7/5387 ,  H02M1/08

CPC classification number: H02M7/5387 ,  H02M2001/0009 ,  H02M2007/53876

Abstract: A power conversion apparatus includes: a power converter that includes a plurality of switching elements; a switch controller that controls the plurality of switching elements so that the order of outputting a plurality of kinds of voltage vectors from the power converter is opposite in a first half and a latter half of a carrier period; a DC-side current detector that detects a DC-side current of the power converter; and a phase current detector that detects one phase current among three phase currents on the basis of the detected DC-side current at a detection timing, the detection timing being selected from a first-half timing and a latter-half timing of the carrier period at which the same kind of voltage vector is output. The phase current detector includes a timing switcher that alternately switches the detection timing between the first-half timing and the latter-half timing.

Abstract translation: 一种电力转换装置，包括：功率转换器，包括多个开关元件; 开关控制器，其控制所述多个开关元件，使得从所述功率转换器输出多种电压矢量的顺序在载波周期的前半部和后半部相反; 检测功率转换器的直流侧电流的直流侧电流检测器; 以及相电流检测器，其基于检测定时的检测到的DC侧电流来检测三相电流之中的一相电流，所述检测定时选自载波周期的前半定时和后期定时 输出相同种类的电压矢量。 相电流检测器包括定时切换器，其交替地切换上半部定时与后半时间之间的检测定时。

公开(公告)号：US20140049202A1

公开(公告)日：2014-02-20

申请号：US13792201

申请日：2013-03-11

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Shingo FUKUMARU ,  Shinya MORIMOTO ,  Hideaki IURA ,  Akira YAMAZAKI

IPC: H02P21/14

CPC classification number: H02P21/146 ,  H02P21/18 ,  H02P21/20 ,  H02P21/24

Abstract: A motor control apparatus according to the embodiment includes a rotational position estimating unit, a change amount estimating unit, and an inductance estimating unit. The rotational position estimating unit estimates a rotational position of a rotor from a motor parameter including a q-axis inductance of a motor on a basis of an output current to the motor and a voltage reference. The change amount estimating unit estimates a change amount of an output torque with respect to a current phase change of the motor corresponding to a high frequency signal whose frequency is higher than a drive frequency of the motor. The inductance estimating unit estimates an inductance value that obtains a maximum torque on a basis of the change amount as the q-axis inductance.

Abstract translation: 根据实施例的电动机控制装置包括旋转位置估计单元，变化量估计单元和电感估计单元。 旋转位置估计单元基于电动机的输出电流和电压基准从包括电动机的q轴电感的电动机参数估计转子的旋转位置。 变化量估计单元估计与频率高于电动机的驱动频率的高频信号相对应的电动机的当前相位变化的输出转矩的变化量。 电感估计单元估计基于作为q轴电感的变化量获得最大转矩的电感值。