Title:
CONTROL DEVICE, ELECTRICAL RAILWAY VEHICLE, AND CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2023/281700
Kind Code:
A1
Abstract:
This control device comprises: a power conversion unit (51); a reference rotational speed acquisition unit (523); and an abnormality determination unit (527). The power conversion unit (51) supplies power to each of a plurality of motors. The reference rotational speed acquisition unit (523) acquires, when it is determined that a plurality of rotational speed sensors include a suspected abnormality sensor which is suspected to be abnormal, a reference rotational speed on the basis of a signal indicating a rotational speed outputted from each of rotational speed sensors other than the suspected abnormality sensor among the rotational speed sensors. The abnormality determination unit (527) determines, when the difference between a modulation rate acquired on the basis of an instruction value of a voltage for causing the power conversion unit (51) to output and a preset comparison modulation rate is equal to or larger than a modulation rate threshold value, that an abnormality has occurred in a motor corresponding to the suspected abnormality sensor. The abnormality determination unit (527) determines, when the difference between a modulation rate acquired on the basis of the reference rotational speed and the comparison modulation rate is smaller than the modulation rate threshold value, that an abnormality has occurred in the suspected abnormality sensor.
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Inventors:
YOSHIDA YUKI (JP)
Application Number:
PCT/JP2021/025794
Publication Date:
January 12, 2023
Filing Date:
July 08, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P5/46
Domestic Patent References:
| WO2021106149A1 | 2021-06-03 |
Foreign References:
| JPH08336299A | 1996-12-17 | |||
| JP2011147317A | 2011-07-28 |
Attorney, Agent or Firm:
KIMURA Mitsuru (JP)
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