JPS57153271A - Diagnostic method and device for degradation of insulation of coil - Google Patents

Diagnostic method and device for degradation of insulation of coil

Info

Publication number
JPS57153271A
JPS57153271A JP56038659A JP3865981A JPS57153271A JP S57153271 A JPS57153271 A JP S57153271A JP 56038659 A JP56038659 A JP 56038659A JP 3865981 A JP3865981 A JP 3865981A JP S57153271 A JPS57153271 A JP S57153271A
Authority
JP
Japan
Prior art keywords
degradation
coil
detected
insulation
oscillation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56038659A
Other languages
Japanese (ja)
Inventor
Tadashi Sumimoto
Yasuaki Yamazaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yaskawa Electric Corp
Original Assignee
Yaskawa Electric Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yaskawa Electric Manufacturing Co Ltd filed Critical Yaskawa Electric Manufacturing Co Ltd
Priority to JP56038659A priority Critical patent/JPS57153271A/en
Publication of JPS57153271A publication Critical patent/JPS57153271A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/72—Testing of electric windings

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

PURPOSE:To discriminate the degree of degradation of coil insulation nondestructively, by taking notice of the change of the periodic damping state for the degradation of coil insulating materials and detecting this change. CONSTITUTION:When the adhesive strength of an insulating layer is lowered by a thermal degradation and the insulating layer is peeled by the thermal stress in operation and the mechanical stress such as vibration to reduce the tightness of the insulating layer, this reduction of the tightness is detected clearly as a change of periodic damping. Then, when a machine to be tested is still, a coil end 6 is excited by a hammer ring or an exciter 12 is provided in the coil end 6 to excite the coil end 6, and the oscillation is amplified by a preamplifier 8 when the oscillation is detected by a detecting sensor 7, and this amplified oscillation is filtered by a band pass filter 9, and a periodic damping factor is detected by a damping factor measuring circuit 10 and is displayed quantitatively on a display equipment 11. Thus, the state of the degradation of insulation is accurately detected quantitatively without applying a high voltage or the like.
JP56038659A 1981-03-19 1981-03-19 Diagnostic method and device for degradation of insulation of coil Pending JPS57153271A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56038659A JPS57153271A (en) 1981-03-19 1981-03-19 Diagnostic method and device for degradation of insulation of coil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56038659A JPS57153271A (en) 1981-03-19 1981-03-19 Diagnostic method and device for degradation of insulation of coil

Publications (1)

Publication Number Publication Date
JPS57153271A true JPS57153271A (en) 1982-09-21

Family

ID=12531381

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56038659A Pending JPS57153271A (en) 1981-03-19 1981-03-19 Diagnostic method and device for degradation of insulation of coil

Country Status (1)

Country Link
JP (1) JPS57153271A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6444868A (en) * 1987-08-14 1989-02-17 Hiromitsu Okumura Coil testing method and apparatus used therein
WO2013016750A1 (en) * 2011-08-01 2013-02-07 Technische Universitat Wien Method and device for detecting a deterioration in the state of an insulation in an operating electric machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6444868A (en) * 1987-08-14 1989-02-17 Hiromitsu Okumura Coil testing method and apparatus used therein
WO2013016750A1 (en) * 2011-08-01 2013-02-07 Technische Universitat Wien Method and device for detecting a deterioration in the state of an insulation in an operating electric machine
RU2599910C2 (en) * 2011-08-01 2016-10-20 Технише Универзитет Вена Method and device for online detection of deterioration of electric motor insulation
US9529032B2 (en) 2011-08-01 2016-12-27 Technische Universitat Wien Method and device for detecting a deterioration in the state of an insulation in an operating electric machine

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