Title:
【発明の名称】電気機械の成層化鉄心の短絡等欠陥状態についてのチエツク方法及び装置
Document Type and Number:
Japanese Patent JP3119854
Kind Code:
B2
Abstract:
In order to detect interlamination shorts (8 ) in the case of laminated core stacks, the core stack (1) is magnetized with an auxiliary winding. The iron surface (15) is scanned with a measuring coil arrangement (5) comprising two electrically separated, mechanically interlinked coils (6, 7). The output signals from the coils are compared with each other in a downstream measuring instrument (9); in the case of an interlamination short, the fault current through the short-circuited laminations will induce in the coils different, phase-shifted voltages which make it possible to infer the position and size of the interlamination shorts.
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Inventors:
Zlaty Mill Posedel
Application Number:
JP13483089A
Publication Date:
December 25, 2000
Filing Date:
May 30, 1989
Export Citation:
Assignee:
Asea Brown Bovelli Akti Ngezershyaft
International Classes:
G01N27/83; G01N27/90; G01R31/02; (IPC1-7): G01R31/02; G01N27/83
Domestic Patent References:
| JP5716346A | ||||
| JP6341764U |
Attorney, Agent or Firm:
Toshio Yano