公开(公告)号：US20220131493A1

公开(公告)日：2022-04-28

申请号：US17647392

申请日：2022-01-07

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Ryo TAKAHASHI ,  Hideaki IKE

IPC: H02P27/08 ,  H02P29/024 ,  H02M7/537

Abstract: A power conversion device is provided, which includes a power conversion circuit configured to convert primary power to secondary power and supply the secondary power to a pump and a control circuit configured to cause the secondary power to follow a control command by the power conversion circuit the control circuit being configured to further execute evaluating, on the basis of the secondary power, an amplitude of a driving force of the pump, setting, on the basis of a relationship between an evaluation result of the amplitude and a driving speed of the pump, an amplitude threshold value profile indicating a relationship between an amplitude threshold value and the driving speed, and detecting an abnormality in the pump in response to the evaluation result of the amplitude exceeding the amplitude threshold value based on the amplitude threshold value profile.

公开(公告)号：US20210278465A1

公开(公告)日：2021-09-09

申请号：US17314046

申请日：2021-05-07

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Hideaki IKE

IPC: G01R31/34 ,  F04D25/06 ,  H02P27/08 ,  H02P23/14

Abstract: A diagnostic apparatus for an electric drive object that generates a drive force in response to receiving electric power, the diagnostic apparatus includes a circuitry configured to: acquire time series force data associated with the drive force; identify a force oscillation level associated with the drive force based on the force data; set an oscillation threshold at a first level when the drive object operates at a first speed and set the threshold at a second level higher than the first level when the drive object operates at a second speed higher than the first speed; and identify an irregularity of the drive object in response to determining that the force oscillation level exceeds the oscillation threshold.

公开(公告)号：US20210317826A1

公开(公告)日：2021-10-14

申请号：US17356518

申请日：2021-06-24

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Hideaki IKE

IPC: F04B49/00 ,  F04B23/04 ,  F04B17/03 ,  F04B49/06

Abstract: A control system may include circuitry configured to: a deterioration level estimation unit configured to estimate deterioration levels of pumping devices based on information about driving forces of the pumping devices; a selection unit configured to select a pumping device from the pumping devices based on a comparison of the estimated deterioration levels estimated by the deterioration level estimation unit; and a pumping control unit configured to control the selected pumping device selected by the selection unit to pump fluid.

公开(公告)号：US20200382036A1

公开(公告)日：2020-12-03

申请号：US16997942

申请日：2020-08-20

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Misaki SHIIYA ,  Masahiro TOUCHI ,  Motomichi OHTO ,  Sadayuki SATO ,  Hideaki IKE ,  Jiro MURAOKA

IPC: H02P23/00 ,  G01R31/34 ,  G01M13/04 ,  H04L29/08 ,  G05B23/02

Abstract: A motor control system includes a motor and a motor control circuitry. The motor includes a rotation axis and a bearing rotatably supporting the rotation axis. The motor control circuitry is configured to control the motor. The motor control circuitry includes a driving time adding circuit configured to add up a driving time of the motor to obtain an accumulated driving time of the motor, a remaining lifetime calculation circuit configured to calculate a remaining lifetime of the bearing based on a lifetime of the bearing and the accumulated driving time, and a warning outputting circuit configured to output warning information when the remaining lifetime is equal to or less than a threshold.