WO2006093323A1 - 絶縁検査装置 - Google Patents
絶縁検査装置 Download PDFInfo
- Publication number
- WO2006093323A1 WO2006093323A1 PCT/JP2006/304425 JP2006304425W WO2006093323A1 WO 2006093323 A1 WO2006093323 A1 WO 2006093323A1 JP 2006304425 W JP2006304425 W JP 2006304425W WO 2006093323 A1 WO2006093323 A1 WO 2006093323A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrode
- winding
- voltage
- insulation
- electrodes
- Prior art date
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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
- G01R31/34—Testing dynamo-electric machines
- G01R31/346—Testing of armature or field windings
Definitions
- the present invention relates to an insulation inspection apparatus, and more particularly, to an insulation inspection apparatus that detects the presence and location of an insulation defect in the shoreline by generating a discharge at the location of the insulation defect in the shoreline.
- a defect detection method for detecting an insulation defect in a wire is conventionally known.
- Japanese Patent Application Laid-Open No. 9-43 30 1 discloses an insulation test method including a step of applying a surge voltage to a coil and detecting whether or not a glow discharge is generated from the coil. ing.
- An object of the present invention is to provide an insulation inspection apparatus capable of accurately detecting the presence or absence and the position of an insulation defect in a winding.
- An insulation inspection apparatus according to the present invention includes an inspection container that can store a winding wire, an electrode provided so as to face the winding wire, a voltage application unit that applies a voltage between the winding wire and the electrode, A sensing unit for detecting current and / or voltage between the wire and the electrode is provided, and a voltage is applied between the winding and the electrode while changing the relative positional relationship between the winding and the electrode.
- the insulation inspection apparatus preferably further includes a decompression unit that decompresses the inside of the inspection container.
- the decompression unit preferably has a pressure in the cuvette greater than 0 Pa and not more than 1 00 0 Pa.
- the electrode faces a coiled end of the wire formed at the axial end of the ring-shaped core body.
- the electrode preferably has a shape that promotes electric field concentration.
- FIG. 1 is a diagram showing a configuration of an insulation inspection apparatus according to one embodiment of the present invention.
- Figure 2 shows the relationship between the pressure inside the cuvette and the discharge start voltage.
- Figure 3 shows the relationship between the distance between the discharge electrodes and the discharge start voltage.
- FIG. 4 is a view of the electrode and coil end as viewed from the direction of the arrow in FIG. 1, and shows one example of the electrode shape.
- FIG. 5 is a view of the electrode and the coil end as seen from the direction of the arrow ⁇ in FIG. 1, and is a view showing another example of the electrode shape.
- FIG. 6 is a view of the electrode and coil end as viewed from the direction of the arrow in FIG. 1, and is a view showing still another example of the electrode shape.
- FIG. 1 is a diagram showing a configuration of an insulation inspection apparatus according to one embodiment of the present invention.
- an insulation inspection apparatus 1 according to the present embodiment includes a chamber 100 (inspection container).
- the stator 2 0 0 has a status core 2 1 0 and a coil end 2 2 0.
- the ring-shaped stator core 210 is configured by laminating plate-shaped magnetic bodies such as iron or iron alloy.
- a plurality of teeth portions (not shown) and slot portions (not shown) as recesses formed between the teeth portions are formed on the inner peripheral surface of the stator core 210.
- the slot portion is provided so as to open to the inner peripheral side of the stator core 210.
- the winding including the three winding phases, U phase, V phase and W phase, is wound around the teeth portion so as to fit into the slot portion.
- the U-phase, V-phase and W-phase of the shoreline are wound so as to be displaced from each other on the circumference.
- the stator core 2 1 0 has a cylindrical surface 2 1 1 and an axial end surface 2 1 2, and the coil end 2 2 0 of the winding is provided on the axial end surfaces 2 1 2 of both the stator core 2 1 0. It is done. An insulation film is provided on the wire that forms the winding wire including the coil end 2 2 0. It is
- the insulation inspection apparatus 1 By the way, if the inner conductor is exposed due to pinholes or cracks in the insulating film of the wire constituting the winding, the insulation between the phases is impaired. On the other hand, according to the insulation inspection apparatus 1, the presence / absence of the insulation defect and its position can be accurately detected by the configuration described later. As a result, it becomes possible to take appropriate measures against insulation defects.
- the insulator 1 includes a defect search unit 110, a detection unit 120, and a decompression unit 13 30.
- the defect detection portion 1 1 0 is provided so as to sandwich the core in the axial direction of the stator core 2 1 0 (direction of arrow DR 1), and the gap between the coil end 2 2 0 and the coil end 2 2 0 is L
- Electrodes 1 1 1, 1 1 2 provided so as to be, and a rotation drive unit 1 1 3 for rotating the electrodes in the circumferential direction of the stator core 2 10 (direction of arrow DR 2).
- the sensing unit 1 2 0 includes a voltage application unit 1 2 1 for applying a voltage between the electrodes 1 1 1 and 1 1 2 and the winding, and a current between the electrodes 1 1 1 and 1 1 2 and the winding. And a detection unit 1 2 2 for detecting Z or voltage.
- the depressurizing unit 1 3 0 depressurizes the inside of the chamber 1 100.
- the rotary drive unit 1 1 3 When performing an insulation test, while the voltage is applied between the electrodes 1 1 1 and 1 1 2 and the windings, the rotary drive unit 1 1 3 is operated and the electrodes 1 1 1 and 1 1 2 Is moved in the direction of arrow DR 2. At the same time, the current and Z or voltage between electrodes 1 1 1 and 1 1 2 and the wire are detected.
- the insulation test can be performed by the same method as described above.
- the inspection time can be shortened by providing a plurality of electrodes at positions shifted from each other in the circumferential direction of the coil end 220.
- the rotation speed of the electrode can be reduced and the inspection accuracy (specific accuracy of the defect position) can be improved.
- the two electrodes 1 1 1 and 1 1 2 are arranged in the direction of arrow DR 2 with a 180 ° offset from each other, so only one electrode is provided.
- the inspection time is cut in half if the electrode rotation speed is set to the same speed. Moreover, if the inspection time is set to the same time, the rotation speed of the electrode can be halved, so that the inspection accuracy (specific accuracy of the defect position) is improved.
- the position of the insulation defect is typically determined by visually checking the occurrence of discharge while moving the electrodes 1 1 1 and 1 1 2. As a result, it is possible to accurately identify the insulation location while suppressing an increase in cost.
- an infrared thermometer to the chamber 100 or analyzing the video image of the inspection situation using an image processing device, the location of the insulation defect can be identified. Identification may be performed. By using these methods, it is possible to specify a position with higher accuracy.
- Figure 2 shows the relationship between the pressure in the cuvette and the discharge start voltage (the voltage required to cause a discharge at the defective location).
- “A” indicates the result of simulation
- “B” indicates the result of an experiment performed using the insulation inspection apparatus 1.
- the discharge start voltage decreases as the pressure in the cuvette decreases. In other words, by reducing the pressure inside the cuvette, it becomes possible to detect an insulation defect by generating a discharge even at a relatively low voltage. By generating a discharge at a low voltage, the damage caused to the insulator around the defect by the discharge is reduced.
- Figure 3 shows the relationship between the distance between the discharge electrodes and the discharge start voltage.
- “A” in FIG. 3 shows the result of the simulation
- “B” shows the result of the experiment performed using the insulation inspection apparatus 1.
- the distance between the discharge electrodes means a gap (L in FIG. 1) between the electrodes 1 1 1, 1 1 2 and the coil end 2 20.
- the discharge start voltage decreases as the distance between the discharge electrodes decreases.
- the experiment (“B”) conducted using the insulation inspection apparatus 1 the discharge start voltage converges to a constant value when the distance between the discharge electrodes is large. This is experimentally indicated. It is considered that the same tendency as the simulation (“A”) can be obtained.
- the electrodes 1 1 1 and 1 1 2 be as close to the coil end 2 2 0 as possible, but in practice, the electrodes 1 1 1 and 1 1 2 are appropriately changed in consideration of the unevenness of the coil end 2 20 in the direction of the arrow D R 1.
- the shape of the electrodes 1 1 1 and 1 1 2 can be changed as appropriate, but the shape of the electrodes is preferably a shape that promotes electric field concentration.
- 4 to 6 are diagrams showing examples of electrode shapes that promote electric field concentration.
- 4 to 6 show a state in which the electrodes 1 1 1, 1 1 2 and coil ends 2 20 are viewed from the direction of arrow ⁇ in FIG.
- the electrode 1 1 1 has a recess 1 1 1 A at a portion facing the coil end 2 2 °. This increases the number of corners of the electrode 1 1 1. As a result, electric field concentration during discharge is promoted, and the discharge start voltage is reduced.
- the electrode 1 1 1 1 has a convex portion 1 1 1 B at a portion facing the coil end 2 2 0.
- the electrode 1 1 1 has a plurality of protruding portions 1 1 1 C protruding from the side surfaces.
- the example shown in Figs. 5 and 6 can achieve the same effect as the example shown in Fig. 4.
- a rare gas such as neon or argon may be introduced into the chamber 100. This makes it possible to easily recognize the presence of a defect because noble gas emits light when a discharge occurs at an insulation defect location. As a result, it is possible to improve inspection accuracy and inspection efficiency.
- the insulation inspection apparatus 1 includes a chamber 100 (inspection container) that can store a stator 20 0 provided with a winding and a coil end 2 20 of the stator winding. Electrodes 1 1 1, 1 1 2 provided to face each other, voltage application unit 1 2 1 for applying a voltage between the winding wire and the electrodes 1 1 1, 1 1 2, and the winding wire and the electrode 1 1 1, 1 1 2, a detection unit 1 2 2 that detects a leakage current and Z or a voltage drop, and a decompression unit 1 3 0 that decompresses the inside of the chamber 100.
- the wire and the electrode are changed while changing the relative positional relationship between the coil end 2 2 0 and the electrodes 1 1 1, 1 1 2.
- a voltage is applied between 1 1 1 and 1 1 2.
- the electrodes 1 1 1 and 1 1 2 may be moved along the outer periphery of the coil end 2 2 0
- the stator 2 00 may be rotated so that the coil end 2 2 0 passes over the fixed electrode.
- the example in which the electrodes 1 1 1 and 1 1 2 are rotated has been mainly described.
- the electrodes 1 1 1 and 1 1 2 are rotated more than the stator 2 0 0 around which the winding is wound. Since it is easier to rotate the device, it is possible to simplify the structure of the device and reduce costs by doing the above.
- the present invention is applied to an insulation inspection apparatus.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Testing Relating To Insulation (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/885,053 US7688076B2 (en) | 2005-03-02 | 2006-03-01 | Insulation inspection apparatus |
EP06728744.1A EP1870721B1 (en) | 2005-03-02 | 2006-03-01 | Insulation inspecting apparatus |
CN2006800070154A CN101133337B (zh) | 2005-03-02 | 2006-03-01 | 绝缘检查设备 |
JP2007506053A JP4749416B2 (ja) | 2005-03-02 | 2006-03-01 | 絶縁検査装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005057657 | 2005-03-02 | ||
JP2005-057657 | 2005-03-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006093323A1 true WO2006093323A1 (ja) | 2006-09-08 |
Family
ID=36941349
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/304425 WO2006093323A1 (ja) | 2005-03-02 | 2006-03-01 | 絶縁検査装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7688076B2 (ja) |
EP (1) | EP1870721B1 (ja) |
JP (1) | JP4749416B2 (ja) |
CN (1) | CN101133337B (ja) |
WO (1) | WO2006093323A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013068579A (ja) * | 2011-09-26 | 2013-04-18 | Mitsubishi Electric Corp | 可変速発電電動機の異常検出装置及び異常検出方法 |
JP2016070859A (ja) * | 2014-10-01 | 2016-05-09 | 株式会社デンソー | 絶縁検査装置 |
WO2022085358A1 (ja) * | 2020-10-19 | 2022-04-28 | 三菱電機株式会社 | マグネットワイヤ被覆の検査装置、マグネットワイヤ被覆の検査方法、および電気機械の製造方法 |
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JP5315814B2 (ja) * | 2008-06-25 | 2013-10-16 | アイシン・エィ・ダブリュ株式会社 | 絶縁被覆導体検査方法及び装置 |
CN102576897B (zh) * | 2009-09-30 | 2015-11-25 | 大日本印刷株式会社 | 绝缘性不良检查装置及使用该装置的绝缘性不良检查方法、电化学电池的制造方法 |
US8289031B1 (en) * | 2011-05-16 | 2012-10-16 | Rao Dantam K | Apparatus for measuring insulation characteristics of coated steel sheet |
CN105051967B (zh) | 2013-03-22 | 2017-10-03 | 汽车能源供应公司 | 薄膜封装电池的检查方法 |
CN103197245B (zh) * | 2013-03-29 | 2015-07-15 | 苏州汇川技术有限公司 | 伺服电机定子检测装置及工艺 |
RU2546827C1 (ru) * | 2013-12-30 | 2015-04-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Ставропольский государственный аграрный университет" | Микроконтроллерное устройство диагностики межвитковой изоляции обмотки электродвигателя |
RU2589762C1 (ru) * | 2015-05-29 | 2016-07-10 | федеральное государственное бюджетное образовательное учреждение высшего образования "Ставропольский государственный аграрный университет" (ФГБОУ ВО Ставропольский ГАУ) | Микроконтроллерное устройство диагностики межвитковой изоляции обмотки электродвигателя с функцией мегомметра |
CN108710073B (zh) * | 2018-07-25 | 2024-06-28 | 国网青海省电力公司电力科学研究院 | T型结构的气体组合电器冲击电压下局部放电试验系统 |
US11187752B2 (en) * | 2018-08-31 | 2021-11-30 | Ateq Corporation | Battery leak test device and methods |
CN110456240A (zh) * | 2019-08-12 | 2019-11-15 | 哈尔滨电机厂有限责任公司 | 一种检测定子绕组端部空气电离放电的试验方法 |
CN110514999A (zh) * | 2019-09-04 | 2019-11-29 | 青岛艾普智能仪器有限公司 | 一种电机定子线圈单点破损检测方法 |
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JP2002296243A (ja) * | 2001-03-29 | 2002-10-09 | Kumamoto Technopolis Foundation | 管内被膜欠陥検査装置および管内被膜欠陥検査方法 |
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JP2005121442A (ja) * | 2003-10-16 | 2005-05-12 | Toyota Motor Corp | コイル絶縁検査装置 |
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2006
- 2006-03-01 EP EP06728744.1A patent/EP1870721B1/en not_active Not-in-force
- 2006-03-01 JP JP2007506053A patent/JP4749416B2/ja not_active Expired - Fee Related
- 2006-03-01 CN CN2006800070154A patent/CN101133337B/zh not_active Expired - Fee Related
- 2006-03-01 WO PCT/JP2006/304425 patent/WO2006093323A1/ja active Application Filing
- 2006-03-01 US US11/885,053 patent/US7688076B2/en not_active Expired - Fee Related
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JPS6281461U (ja) * | 1985-11-07 | 1987-05-25 | ||
JP2002296243A (ja) * | 2001-03-29 | 2002-10-09 | Kumamoto Technopolis Foundation | 管内被膜欠陥検査装置および管内被膜欠陥検査方法 |
JP2004347523A (ja) * | 2003-05-23 | 2004-12-09 | Hitachi Ltd | コイルの絶縁特性試験方法 |
JP2005121442A (ja) * | 2003-10-16 | 2005-05-12 | Toyota Motor Corp | コイル絶縁検査装置 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013068579A (ja) * | 2011-09-26 | 2013-04-18 | Mitsubishi Electric Corp | 可変速発電電動機の異常検出装置及び異常検出方法 |
JP2016070859A (ja) * | 2014-10-01 | 2016-05-09 | 株式会社デンソー | 絶縁検査装置 |
WO2022085358A1 (ja) * | 2020-10-19 | 2022-04-28 | 三菱電機株式会社 | マグネットワイヤ被覆の検査装置、マグネットワイヤ被覆の検査方法、および電気機械の製造方法 |
JPWO2022085358A1 (ja) * | 2020-10-19 | 2022-04-28 | ||
JP7329698B2 (ja) | 2020-10-19 | 2023-08-18 | 三菱電機株式会社 | マグネットワイヤ被覆の検査装置、マグネットワイヤ被覆の検査方法、および電気機械の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1870721A4 (en) | 2012-05-09 |
EP1870721A1 (en) | 2007-12-26 |
US20080258737A1 (en) | 2008-10-23 |
JPWO2006093323A1 (ja) | 2008-08-07 |
US7688076B2 (en) | 2010-03-30 |
CN101133337B (zh) | 2011-06-08 |
CN101133337A (zh) | 2008-02-27 |
EP1870721B1 (en) | 2013-07-24 |
JP4749416B2 (ja) | 2011-08-17 |
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