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1. (WO2018158910) DIAGNOSTIC DEVICE AND DIAGNOSTIC METHOD

Pub. No.:    WO/2018/158910    International Application No.:    PCT/JP2017/008303
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Fri Mar 03 00:59:59 CET 2017
IPC: G01R 31/34
G01M 99/00
H02K 11/27
Applicants: HITACHI, LTD.
株式会社日立製作所
Inventors: KATO Tetsuji
加藤 哲司
MAKI Kohji
牧 晃司
NAGATA Minori
永田 稔
Title: DIAGNOSTIC DEVICE AND DIAGNOSTIC METHOD
Abstract:
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.