DE102015203547A1 - Non-destructive detection of faults in stator windings and device - Google Patents
Non-destructive detection of faults in stator windings and device Download PDFInfo
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- DE102015203547A1 DE102015203547A1 DE102015203547.6A DE102015203547A DE102015203547A1 DE 102015203547 A1 DE102015203547 A1 DE 102015203547A1 DE 102015203547 A DE102015203547 A DE 102015203547A DE 102015203547 A1 DE102015203547 A1 DE 102015203547A1
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- insulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/72—Investigating presence of flaws
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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- Analytical Chemistry (AREA)
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- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
Durch die lokale Erwärmung mittels eines ohmschen Widerstandes kann die Isolierung einer Ständerwicklung erwärmt werden, so dass durch eine Thermographiekamera ein Defekt in der Isolierung detektiert werden kann.The local heating by means of an ohmic resistor, the insulation of a stator winding can be heated so that a defect in the insulation can be detected by a thermographic camera.
Description
Die Erfindung betrifft die zerstörungsfreie Detektierung von Erdschlüssen bei Ständerwicklungen und eine Vorrichtung. The invention relates to the non-destructive detection of ground faults in stator windings and a device.
Im Fall eines Fehlers der Isolierung von Ständerwicklungen, welcher durch einen niedrigen Isolationswiderstand messbar ist, ergibt sich das Problem, den Ort des Fehlers zu lokalisieren, da dieses rein visuell meist nicht möglich ist. In the case of a fault of the insulation of stator windings, which is measurable by a low insulation resistance, there is the problem of locating the location of the fault, since this is usually not possible visually.
Bisher konnte der Ort des Fehlers nur dadurch eingeschränkt werden, indem zerstörend geprüft wurde. Die betroffene Phase der Wicklung kann mittels Isolationswiderstandsmessung bestimmt werden. Im Anschluss daran wird die Phase an den Scheitelverbindungen mittels Säge in zwei gleichgroße Teilstränge aufgetrennt. Previously, the location of the error could only be limited by destructive testing. The affected phase of the winding can be determined by means of insulation resistance measurement. Subsequently, the phase at the apex connections is cut by saw into two equal partial strands.
Danach erfolgt an den beiden Teilsträngen erneut eine Isolationswiderstandmessung. Der Teilstrang, in welchen der Fehler vorliegt, zeigt erneut einen geringen Isolationswiderstand. Dieser Teilstrang wird nun wieder mittels Säge an den Scheitelverbindungen in zwei gelichgroße Stränge unterteilt und der Isolationswiderstand gemessen. Der Vorgang des Auftrennens in zwei Teilstränge und Messen des Isolationswiderstandes muss solange wiederholt werden, bis der betroffene Stab identifiziert ist. Thereafter, an insulation resistance measurement is again carried out on the two sub-strands. The sub-string in which the error is present again shows a low insulation resistance. This sub-string is now divided again by means of a saw at the vertex joints in two gelichgroße strands and measured the insulation resistance. The process of separating into two sub-strands and measuring the insulation resistance must be repeated until the affected rod is identified.
Es ist daher Aufgabe der Erfindung oben genanntes Problem zu lösen. It is therefore an object of the invention to solve the above-mentioned problem.
Die Aufgabe wird gelöst durch ein Verfahren gemäß Anspruch 1 und eine Vorrichtung gemäß Anspruch 4. The object is achieved by a method according to claim 1 and a device according to
In den Unteransprüchen sind weitere vorteilhafte Maßnahmen aufgelistet, die beliebig miteinander kombiniert werden können, um weitere Vorteile zu erzielen. In the dependent claims further advantageous measures are listed, which can be combined with each other in order to achieve further advantages.
Es zeigt die Figur eine Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens. The figure shows a device for carrying out the method according to the invention.
Die Figur und die Beschreibung stellen nur Ausführungsbeispiele der Erfindung dar. The figure and the description represent only embodiments of the invention.
Durch Aufheizen einer Fehlstelle mittels einer vorhandenen Spannungsquelle kann mittels einer Thermokamera die Fehlstelle schnell lokalisiert werden. Hierbei ist nur ein geringer Energieeintrag notwendig, so dass zerstörungsfrei geprüft werden kann. By heating a defect by means of an existing voltage source, the defect can be quickly located by means of a thermal camera. Here, only a small input of energy is necessary so that it can be tested non-destructively.
Das Verfahren ist einfach und effektiv im Vergleich zur zerstörenden Prüfung. Eine Lokalisierung der Fehlstelle im mm-Bereich ist möglich. The procedure is simple and effective compared to destructive testing. A localization of the defect in the mm range is possible.
Die Figur zeigt eine Vorrichtung
Die Vorrichtung
Dann wird mit einer Kamera
Das Verfahren kann insbesondere auch bei Ständerwicklungen für Gas- oder Dampfturbinen eingesetzt werden, den sogenannten AGS-Beschichtungen. The method can be used in particular for stator windings for gas or steam turbines, the so-called AGS coatings.
Ggf. kann AGS-Lack auf die Kontaktstellen der Klemmen
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015203547.6A DE102015203547A1 (en) | 2015-02-27 | 2015-02-27 | Non-destructive detection of faults in stator windings and device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015203547.6A DE102015203547A1 (en) | 2015-02-27 | 2015-02-27 | Non-destructive detection of faults in stator windings and device |
Publications (1)
Publication Number | Publication Date |
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DE102015203547A1 true DE102015203547A1 (en) | 2016-09-01 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE102015203547.6A Withdrawn DE102015203547A1 (en) | 2015-02-27 | 2015-02-27 | Non-destructive detection of faults in stator windings and device |
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DE (1) | DE102015203547A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5089700A (en) * | 1990-01-30 | 1992-02-18 | Amdata, Inc. | Apparatus for infrared imaging inspections |
US20040120383A1 (en) * | 2002-12-19 | 2004-06-24 | The Boeing Company | Non-destructive testing system and method using current flow thermography |
US20080075329A1 (en) * | 2006-09-21 | 2008-03-27 | Thomas Brinz | Automatic detection of coating flaws |
WO2009129864A1 (en) * | 2008-04-25 | 2009-10-29 | Agc Flat Glass Europe Sa | Method for detecting electrical inhomogeneities caused by local defects in a conductive layer and corresponding apparatus |
DE102012216624A1 (en) * | 2011-09-22 | 2013-03-28 | GM Global Technology Operations LLC (n.d. Ges. d. Staates Delaware) | Non-destructive evaluation of welded joints of a stator with bar windings using infrared and temperature methods |
US20140269830A1 (en) * | 2008-05-20 | 2014-09-18 | Massachusetts Institute Of Technology | Systems and methods for structural sensing |
-
2015
- 2015-02-27 DE DE102015203547.6A patent/DE102015203547A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5089700A (en) * | 1990-01-30 | 1992-02-18 | Amdata, Inc. | Apparatus for infrared imaging inspections |
US20040120383A1 (en) * | 2002-12-19 | 2004-06-24 | The Boeing Company | Non-destructive testing system and method using current flow thermography |
US20080075329A1 (en) * | 2006-09-21 | 2008-03-27 | Thomas Brinz | Automatic detection of coating flaws |
WO2009129864A1 (en) * | 2008-04-25 | 2009-10-29 | Agc Flat Glass Europe Sa | Method for detecting electrical inhomogeneities caused by local defects in a conductive layer and corresponding apparatus |
US20140269830A1 (en) * | 2008-05-20 | 2014-09-18 | Massachusetts Institute Of Technology | Systems and methods for structural sensing |
DE102012216624A1 (en) * | 2011-09-22 | 2013-03-28 | GM Global Technology Operations LLC (n.d. Ges. d. Staates Delaware) | Non-destructive evaluation of welded joints of a stator with bar windings using infrared and temperature methods |
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |