Title:
監視装置、および監視方法
Document Type and Number:
Japanese Patent JP7194069
Kind Code:
B2
Abstract:
This monitoring device is provided with: a current sensor for detecting two-phase current information for each of a plurality of drive motors; a motor information calculation unit for calculating the torque current or rotational speed of the corresponding drive motor from the current information; a feature quantity calculation unit for calculating feature quantities for the torque currents or rotational speeds of the plurality of drive motors; a state estimation unit for estimating a device state on the basis of the feature quantity of a drive motor having a correlation from among the plurality of drive motors; a data storage unit for storing reference value data; and an abnormality determination unit for determining an abnormality state on the basis of the estimated device state and the reference value data.
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Inventors:
Zhou Hiroshi
Akihiro Nakamura
Exit Mita
Satoru Kaneko
Yoshihisa Iwaji
Akihiro Nakamura
Exit Mita
Satoru Kaneko
Yoshihisa Iwaji
Application Number:
JP2019079449A
Publication Date:
December 21, 2022
Filing Date:
April 18, 2019
Export Citation:
Assignee:
Hitachi Industrial Equipment Systems Co., Ltd.
International Classes:
H02P29/024; B23Q17/09
Domestic Patent References:
| JP2014194727A |
Foreign References:
| WO2016084213A1 | ||||
| WO2016092871A1 | ||||
| US4695941 |
Attorney, Agent or Firm:
Seiryo Patent Attorneys Corporation
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