公开(公告)号：US11953555B2

公开(公告)日：2024-04-09

申请号：US16644168

申请日：2017-10-24

申请人： Mitsubishi Electric Corporation

发明人： Makoto Kanemaru ,  Takuya Ohkubo ,  Sota Sano ,  Akira Satake ,  Satoru Terashima

IPC分类号： G01R31/34 ,  H02H7/08 ,  H02P29/024

CPC分类号： G01R31/343 ,  H02H7/08 ,  H02P29/027

摘要： An abnormality diagnosis device includes: a data acquirer to acquire a current waveform and a driving frequency of an electric motor; a storage which stores a combination of a current value of the current waveform and the driving frequency at an identical time by the data acquirer; a data determiner to determine whether or not a current value of the current waveform and the driving frequency as a diagnosis target at an identical time by the data acquisition match the combination stored in the storage; an analyzer to perform frequency analysis for the current waveform determined to be matched by the data determiner, to extract sideband waves, and calculate a spectrum intensity of the sideband waves; and an abnormality diagnosis processor to make a diagnosis that abnormality has occurred, when the spectrum intensity of the sideband waves is equal to or greater than a threshold.

公开(公告)号：US10883895B2

公开(公告)日：2021-01-05

申请号：US16341350

申请日：2017-09-01

申请人： Mitsubishi Electric Corporation

发明人： Makoto Kanemaru ,  Mitsuru Tsukima ,  Takuya Ohkubo ,  Tomoko Takasuka ,  Toshihiko Miyauchi

IPC分类号： G01M13/02 ,  H02P29/024 ,  G01H1/00 ,  G01R31/34

摘要： The power transmission mechanism abnormality diagnostic device includes a monitoring diagnosis unit for performing determination as to abnormality of a power transmission mechanism, and a current detector connected to a power supply of an electric motor, wherein the monitoring diagnosis unit includes an analysis unit for analyzing current transmitted from the current detector and an abnormality determination unit for performing determination as to abnormality of the power transmission mechanism on the basis of a result of analysis by the analysis unit.