DIAGNOSTIC DEVICE AND DIAGNOSTIC METHOD

WIPO Patent Application WO/2018/158910

A1

Provided is a diagnostic device for highly accurately diagnosing a rotating machine even when a diagnosis is based on a small amount of current data. This diagnostic device is provided with a current measurement unit for measuring current flowing through at least two locations in a rotating machine and a diagnostic unit for diagnosing, on the basis of current data output by the current measurement unit, the state of the rotating machine and a peripheral device electrically or mechanically connected to the rotating machine. The diagnostic unit creates a Lissajous curve distribution map by layering multiple periods of the two types of current data obtained by the current measurement unit and diagnoses the state of the rotating machine system from the results of evaluating the distribution map.

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KATO TETSUJI (JP)
MAKI KOHJI (JP)
NAGATA MINORI (JP)

PCT/JP2017/008303

September 07, 2018

March 02, 2017

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HITACHI LTD (JP)

G01R31/34; G01M99/00; H02K11/27

JP2011075522A	2011-04-14
JP2005251185A	2005-09-15
JPH0974794A	1997-03-18
JP2015227889A	2015-12-17
JP2003274691A	2003-09-26
EP2851698A1	2015-03-25
JP2010288352A	2010-12-24

TODA Yuji (JP)

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