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Title:
回転機の短絡診断装置および回転機の短絡診断方法
Document Type and Number:
Japanese Patent JP6646416
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To surely detect occurrence of one turn short circuit in a rotary machine.SOLUTION: A diagnostic method comprises: a step (S100) of reading a load current Iu passing through an U-phase of a three-phase coil of a dynamo-electric motor 2; a step (S102) of storing the load current to a buffer for the load current; a step (S104) of performing a frequency analysis to the stored load current Iu; a step (S106) of reading an amplification value Ami corresponding to eleven predetermined frequencies Fri from a result of a FFT analysis; and a step (S108) of mapping eleven data on to a SOM for the short circuit diagnostic as eleven-dimensional characteristics and executing diagnostic of the presence/absence of occurrence of the short circuit depending on an arrangement place as eleven-dimensional characteristics. The eleven predetermined frequencies Fri is a frequency indicating a large amplitude value Ami when the short circuit occurs in one turn in compered with a case of a normal state without the occurrence of the short circuit. Thus, the occurrence of very little short circuit in one turn can be surely detected.SELECTED DRAWING: Figure 2

Inventors:
Nakamura Hisae
Application Number:
JP2015228837A
Publication Date:
February 14, 2020
Filing Date:
November 24, 2015
Export Citation:
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Assignee:
Toenec Co., Ltd.
International Classes:
H02P23/14; G01R31/34; G01R31/50; G05B23/02; H02P29/024
Domestic Patent References:
JP57184981A
JP52014808A
JP2014114111A
JP60200742A
JP2010016982A
JP2014512799A
Attorney, Agent or Firm:
Fukuyama Masatoshi