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1.发明授权公开(公告)号：US11953555B2
公开(公告)日：2024-04-09
申请号：US16644168
申请日：2017-10-24
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.
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公开(公告)号：US09742333B2
公开(公告)日：2017-08-22
申请号：US15152008
申请日：2016-05-11
CPC分类号： H02P21/22 , H02P6/181 , H02P21/0021 , H02P21/05 , H02P27/085 , H02P2207/05
摘要： To achieve smooth switching of control without fluctuations in speed and torque, an excitation current command is allowed to transit linearly or in accordance with the function of speed between a value under sensorless vector control and a value under low-speed region control in accordance with a speed command or estimated speed in a speed region where the control is switched or in an adjacent speed region where sensorless vector control is performed. Therefore, abrupt variations in excitation current are reduced before and after the switching of the control.
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公开(公告)号：US10389290B2
公开(公告)日：2019-08-20
申请号：US15564618
申请日：2016-09-05
发明人： Makoto Higashino , Satoru Terashima
IPC分类号： H02P21/22 , H02P21/14 , H02P25/022 , H02P5/50 , H02P29/024 , H02M7/537 , H02M1/32 , H02M7/5387
摘要： A motor control apparatus applied to a structure in which a plurality of synchronous motors connected in parallel and mechanically coupled to each other is driven by a single power converter, includes a vector control unit and an abnormality detection unit. The vector control unit divides a current flowing in/out the synchronous motors into a q-axis current and a d-axis current and individually controls the divided currents based on a q-axis current command value and a d-axis current command value. The abnormality detection unit detects whether at least one synchronous motor is wrongly wired or is disconnected based on a q-axis inductance, the q-axis current command value, a rotation speed of the synchronous motors, and a d-axis voltage command value.
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