JPS649360A - Defect detecting method of winding of rotary machine - Google Patents
Defect detecting method of winding of rotary machineInfo
- Publication number
- JPS649360A JPS649360A JP62162460A JP16246087A JPS649360A JP S649360 A JPS649360 A JP S649360A JP 62162460 A JP62162460 A JP 62162460A JP 16246087 A JP16246087 A JP 16246087A JP S649360 A JPS649360 A JP S649360A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- voltage
- partial discharge
- winding
- pinhole
- 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
Links
Landscapes
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
PURPOSE:To make it possible to detect the presence or absence and the position of a pinhole in a winding at a relatively low voltage, by reducing the pressure in a container under the state a constant voltage is applied to the winding of a rotary machine, and measuring the amount of the electric charge and the voltage when partial discharge occurs. CONSTITUTION:A constant voltage (e.g., 340-410VPEAK for air), which is slightly higher than the minimum breakdown voltage in a Paschen curve of a gas in a container, is applied to a winding 3 of a rotary machine, which is set in the container 2. It is desirable that the value of the applied voltage is as low as possible in a range wherein an enamel wire is not deteriorated. With the voltage applied, the pressure in the container 2 is reduced with a vacuum pump 11. Then partial discharge occurs at a certain pressure. When the pressure is further decreased, very large amount of discharge occurs at the intermediate part. The large amount of the discharge is the discharge from a pinhole. Therefore, whether the discharge is the partial discharge from the pinhole or the partial discharge from another part is judged based on the magnitude of the partial discharge. The pressure when the partial discharge occurs is measured with a pressure gage 12. The distance to the pinhole is obtained based on the characteristics of pressure/gap length, and the position is judged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62162460A JPS649360A (en) | 1987-07-01 | 1987-07-01 | Defect detecting method of winding of rotary machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62162460A JPS649360A (en) | 1987-07-01 | 1987-07-01 | Defect detecting method of winding of rotary machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS649360A true JPS649360A (en) | 1989-01-12 |
Family
ID=15755038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62162460A Pending JPS649360A (en) | 1987-07-01 | 1987-07-01 | Defect detecting method of winding of rotary machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS649360A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005340173A (en) * | 2004-04-27 | 2005-12-08 | Matsushita Electric Ind Co Ltd | Fuel cell stack |
| JP2006032328A (en) * | 2004-06-17 | 2006-02-02 | Mitsubishi Materials Corp | Fuel cell |
| CN100351979C (en) * | 2003-08-22 | 2007-11-28 | 上海永新彩色显像管股份有限公司 | High-voltage testing method for high-voltage distributor of color kinescope and quasi-equivalent apparattus therefor |
| US8192887B2 (en) | 2007-02-16 | 2012-06-05 | Seiko Instruments Inc. | Fuel cell |
| US9413027B2 (en) | 2013-03-19 | 2016-08-09 | Hyundai Motor Company | Fuel cell system and the operating method thereof |
| CN107170528A (en) * | 2017-05-11 | 2017-09-15 | 苏州市新的电工有限公司 | A kind of detection method of polyester-imide enamel covered wire baking degree |
-
1987
- 1987-07-01 JP JP62162460A patent/JPS649360A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100351979C (en) * | 2003-08-22 | 2007-11-28 | 上海永新彩色显像管股份有限公司 | High-voltage testing method for high-voltage distributor of color kinescope and quasi-equivalent apparattus therefor |
| JP2005340173A (en) * | 2004-04-27 | 2005-12-08 | Matsushita Electric Ind Co Ltd | Fuel cell stack |
| JP2006032328A (en) * | 2004-06-17 | 2006-02-02 | Mitsubishi Materials Corp | Fuel cell |
| US8192887B2 (en) | 2007-02-16 | 2012-06-05 | Seiko Instruments Inc. | Fuel cell |
| US9413027B2 (en) | 2013-03-19 | 2016-08-09 | Hyundai Motor Company | Fuel cell system and the operating method thereof |
| CN107170528A (en) * | 2017-05-11 | 2017-09-15 | 苏州市新的电工有限公司 | A kind of detection method of polyester-imide enamel covered wire baking degree |
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