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公开(公告)号：US11183942B2
公开(公告)日：2021-11-23
申请号：US16671222
申请日：2019-11-01
Applicant: KABUSHIKI KAISHA YASKAWA DENKI
Inventor： Kentaro Inomata , Akira Yamazaki , Masato Higuchi , Hidenori Hara
Abstract: A power conversion apparatus connectable in parallel to a second power conversion apparatus includes circuitry that generates a carrier wave, generates a pulse signal synchronized with the carrier wave, generates power that is based on a width of the pulse signal, obtains a monitor value corresponding to a circulating current circulating between the power conversion apparatus and the second power conversion apparatus, and based on the monitor value obtained while the power conversion circuitry is generating driving power, changes a period of the carrier wave to decrease the circulating current.
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公开(公告)号：US10199971B2
公开(公告)日：2019-02-05
申请号：US15176281
申请日：2016-06-08
Applicant: Kabushiki Kaisha Yaskawa Denki
Inventor： Akira Yamazaki
Abstract: A motor controller includes a driver, a current detector, and a command generator. The driver is configured to drive a power converter based on a flux command on which an exploration signal is superimposed. The current detector is configured to detect an output current output from the power converter that has been driven by the driver. The command generator is configured to generate the flux command so as to reduce a current component, among current components included in the output current detected by the current detector, that corresponds to the exploration signal.
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公开(公告)号：US09543851B2
公开(公告)日：2017-01-10
申请号：US14514390
申请日：2014-10-15
Applicant: KABUSHIKI KAISHA YASKAWA DENKI
Inventor： Joji Ebisu , Akira Yamazaki
CPC classification number: H02M5/293 , H02M1/00 , H02M2001/0054 , H02M2005/2932 , Y02B70/1491
Abstract: A matrix converter includes: a power converter configured to couple an AC power supply and a load together; and a controller configured to selectively execute: a first control mode in which the controller is configured to perform power conversion between the AC power supply and the load; and a second control mode in which the controller is configured to directly combine the AC power supply with the load. The controller is configured to: increase the output voltage and cause a phase of the output voltage follow up a voltage phase of the AC power supply in a case where a difference between a frequency of an output voltage from the power converter to the load and a frequency of the AC power supply becomes within a predetermined range.
Abstract translation: 矩阵转换器包括：功率转换器，被配置为将AC电源和负载耦合在一起; 以及控制器，被配置为选择性地执行：所述控制器被配置为在所述AC电源和所述负载之间执行电力转换的第一控制模式; 以及第二控制模式，其中所述控制器被配置为将所述AC电源与所述负载直接组合。 控制器被配置为：在从功率转换器到负载的输出电压的频率与负载之间的差异的情况下，增加输出电压并使得输出电压的相位跟随交流电源的电压相位 AC电源的频率变为规定范围。
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公开(公告)号：US08988027B2
公开(公告)日：2015-03-24
申请号：US13792201
申请日：2013-03-11
Applicant: Kabushiki Kaisha Yaskawa Denki
Inventor： Shingo Fukumaru , Shinya Morimoto , Hideaki Iura , Akira Yamazaki
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。
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公开(公告)号：US11677330B2
公开(公告)日：2023-06-13
申请号：US17243922
申请日：2021-04-29
Applicant: KABUSHIKI KAISHA YASKAWA DENKI
Inventor： Kentaro Inomata , Akira Yamazaki , Masato Higuchi , Hidenori Hara
CPC classification number: H02M7/493 , H02M5/458 , H02M1/0043
Abstract: A power conversion device connected in parallel to a second power conversion device including power conversion circuitry that performs power conversion by changing a connection state between first multiple lines on a primary side and second multiple lines on a secondary side, baseline selection circuitry that selects one of the second multiple lines on the secondary side as a baseline and partial modulation control circuitry that controls the power conversion circuitry to maintain a state in which the baseline is connected to one of the first multiple lines on the primary side and to change a connection state between other second multiple lines on the secondary side and the first multiple lines on the primary side, wherein the baseline selection circuitry switches a line selected as the baseline based on a switching timing used by second baseline selection circuitry of the second power conversion device to select a second baseline.
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Patent Agency Ranking
公开(公告)号：US11545924B2
公开(公告)日：2023-01-03
申请号：US17386581
申请日：2021-07-28
Applicant: KABUSHIKI KAISHA YASKAWA DENKI
Inventor： Kentaro Inomata , Akira Yamazaki
Abstract: A power conversion device includes processing circuitry that estimates a magnet magnetic flux of an electric motor based on a d-axis magnetic flux generated in the electric motor, a d-axis inductance of the electric motor, and a d-axis current flowing in the electric motor, estimates a q-axis inductance of the electric motor based on a q-axis magnetic flux generated in the electric motor and a q-axis current flowing in the electric motor, estimates a drive force of the electric motor based on the magnet magnetic flux and the q-axis inductance, and corrects a current command such that the drive force follows a drive force command.
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公开(公告)号：US12063000B2
公开(公告)日：2024-08-13
申请号：US17731302
申请日：2022-04-28
Applicant: KABUSHIKI KAISHA YASKAWA DENKI
Inventor： Sadayuki Sato , Hideaki Iura , Akira Yamazaki
Abstract: A power conversion device include: a power conversion circuitry configured to generate a driving voltage for an electric motor; and control circuitry configured to: control the power conversion circuitry to generate the driving voltage corresponding to a voltage command; acquire information indicating an output current that has flown to the electric motor according to the driving voltage; calculate a phase error based on the voltage command, the output current, and an inductance of the electric motor; calculate an updated voltage command based on a frequency command, the output current, and the inductance, wherein the updated voltage command has a command phase; calculate a phase error based on the voltage command, the output current, and the inductance; correct the command phase based on the phase error; and control the power conversion circuitry to generate the driving voltage corresponding to the updated voltage command having the corrected command phase.
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公开(公告)号：US09647569B2
公开(公告)日：2017-05-09
申请号：US14863452
申请日：2015-09-24
Applicant: KABUSHIKI KAISHA YASKAWA DENKI
Inventor： Akira Yamazaki
CPC classification number: H02M5/297 , H02M1/12 , H02M5/02 , H02M5/271 , H02M5/4585 , H02M2005/2932
Abstract: A matrix convertor includes a power convertor and a controller. The power convertor includes a plurality of bidirectional switches disposed between a plurality of input phases and a plurality of output phases. The controller is configured to generate a control command and control the power convertor based on the control command. The control command includes a switching pattern that causes a first input phase among the input phases to be connected to one output phase among the output phases and that causes connection of the input phases to be switched between a rest of the output phases. In generating the control command, the controller is configured to set a lower limit to a period of time during which a second input phase among the input phases that corresponds to an intermediate voltage is connected to the rest of the output phases.
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9.发明申请公开(公告)号：US20160190970A1
公开(公告)日：2016-06-30
申请号：US14757846
申请日：2015-12-24
Applicant: KABUSHIKI KAISHA YASKAWA DENKI
Inventor： Akira Yamazaki , Yoichi Yano
CPC classification number: H02P27/08 , H02P21/0021 , H02P21/06 , H02P27/085 , H02P27/16 , H02P2205/01 , H02P2209/13
Abstract: A power convertor includes a power conversion unit, a PWM controller, and a frequency changer. The power conversion unit includes a plurality of switching elements. The PWM controller is configured to perform PWM control of the plurality of switching elements. The frequency changer is configured to change a carrier frequency in the PWM control. The frequency changer includes an outputter, an integrator, and a frequency determiner. The outputter is configured to output a control value in accordance with a control deviation with respect to a control target. The integrator is configured to integrate the control value output from the outputter. The frequency determiner is configured to determine the carrier frequency based on an integral value obtained by the integrator.
Abstract translation: 功率转换器包括功率转换单元，PWM控制器和变频器。 功率转换单元包括多个开关元件。 PWM控制器被配置为执行多个开关元件的PWM控制。 变频器配置为更改PWM控制中的载波频率。 变频器包括输出器，积分器和频率确定器。 输出器被配置为根据关于控制目标的控制偏差来输出控制值。 积分器被配置为集成从输出器输出的控制值。 频率确定器被配置为基于由积分器获得的积分值来确定载波频率。
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公开(公告)号：US09276486B2
公开(公告)日：2016-03-01
申请号：US14541040
申请日：2014-11-13
Applicant: KABUSHIKI KAISHA YASKAWA DENKI
Inventor： Akira Yamazaki , Joji Ebisu
CPC classification number: H02M5/293 , H02M1/088 , H02M5/297 , H02M2001/0003 , H02M2001/0025 , H02M2001/385 , H02M2005/2932
Abstract: A matrix converter includes a power converter, a command generator, and a commutation controller. The power converter includes bidirectional switches each having a conducting direction controllable by switching elements. The bidirectional switches are disposed between input terminals coupled to phases of an AC power source and output terminals coupled to phases of a load. The command generator generates a control command based on a voltage command specifying a pulse width of pulse width modulation control. The commutation controller controls the switching elements by a commutation method based on the control command so as to perform commutation control. The command generator includes a corrector to, when an error in an output voltage is caused by the commutation control, correct the pulse width specified in the voltage command in generating the control command to reduce the error in the output voltage.
Abstract translation: 矩阵转换器包括功率转换器，命令发生器和换向控制器。 功率转换器包括各自具有可由开关元件控制的导电方向的双向开关。 双向开关设置在耦合到AC电源的相位的输入端子和耦合到负载的相位的输出端子之间。 命令发生器基于指定脉冲宽度调制控制的脉冲宽度的电压指令生成控制命令。 换向控制器通过基于控制命令的换向方法来控制开关元件，以进行换向控制。 命令发生器包括校正器，当由换向控制引起输出电压的误差时，校正在电压指令中指定的脉冲宽度以产生控制命令以减小输出电压的误差。
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