Title:
POWER CONVERTING DEVICE AND SIGN DIAGNOSTIC METHOD USED IN SAME
Document Type and Number:
WIPO Patent Application WO/2021/038829
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: a power converting device that is capable of indicating to a user whether a diagnosis has been performed properly; and a sign diagnostic method used in the same. In order to achieve the purpose, this power converting device that controls an AC electric motor is configured to have a current detecting circuit for detecting a phase current of the AC electric motor and a sign diagnostic function unit that has a sign diagnostic function for diagnosing a sign of a mechanical abnormality of the AC electric motor, wherein the sign diagnostic function unit comprises: a diagnosis determining unit that determines the level of the mechanical abnormality of the AC electric motor on the basis of the detected phase current; a diagnosis management unit that manages a determination result of the diagnostic determining unit, a control state of the AC electric motor, and an execution state of the sign diagnostic function based on an environmental state of a drive system that includes the AC electric motor; and an output generating unit that receives an instruction from the diagnostic management unit and generates display information of an execution result of the sign diagnostic function, the display information being output to the outside.
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Inventors:
OHYA MASATO (JP)
Application Number:
PCT/JP2019/034113
Publication Date:
March 04, 2021
Filing Date:
August 30, 2019
Export Citation:
Assignee:
HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)
International Classes:
H02P29/024; G01R31/34; G05B23/02
Domestic Patent References:
| WO2014156386A1 | 2014-10-02 |
Foreign References:
| JP2016158315A | 2016-09-01 | |||
| JP2016156643A | 2016-09-01 | |||
| JP2018182786A | 2018-11-15 | |||
| US6529135B1 | 2003-03-04 |
Other References:
See also references of EP 4024700A4
Attorney, Agent or Firm:
SEIRYO I.P.C. (JP)
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