CN204359848U - For the electrode system that thermally stimulated current is measured - Google Patents
For the electrode system that thermally stimulated current is measured Download PDFInfo
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- CN204359848U CN204359848U CN201520027922.1U CN201520027922U CN204359848U CN 204359848 U CN204359848 U CN 204359848U CN 201520027922 U CN201520027922 U CN 201520027922U CN 204359848 U CN204359848 U CN 204359848U
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Abstract
The utility model belongs to electrode test technical field, particularly a kind of electrode system measured for thermally stimulated current.This electrode system is arranged in vacuum chamber, and the bottom of vacuum chamber arranges cold trap; Connected by many support columns between upper flange and bottom electrode; Each support column is made up of the spring supporting post of epimere and the threaded post of hypomere, between spring supporting post and threaded post, arrange insulcrete; The center mounting center threaded post of insulcrete, installs sample between the lower end of center threaded post and bottom electrode; Tapped copper coin through insulcrete, and is installed in the upper end of center threaded post, tapped copper coin top installation high-voltage electrode in the upper end of center threaded post.The TSC that described electrode system may be used in high vacuum chamber measures.The TSC testing reliability under high voltage polarization and the requirement of high cooling efficiency can be met, in ease for use, extendability and maintainability, have outstanding advantage again.
Description
Technical field
The utility model belongs to electrode test technical field, particularly a kind of electrode system measured for thermally stimulated current.
Background technology
Thermally stimulated current measurement is one of measurement means that can reflect dielectric internal space-charge trap parameters, at relatively high temperatures dielectric is polarized, rapid prevention relaxation of being lowered the temperature rapidly by dielectric again, will enter sunken electric charge slow releasing by linear temperature increase afterwards and form lax electric current.Dielectric space charge characteristic can be obtained by analyzing this current-temperature spectrum.
The critical piece of thermally stimulated current measurement mechanism comprises polarization power supply, current measure device, temperature control equipment and potential electrode etc.
Because dielectric may bear highfield effect in actual applications, according to low temperature nitrogen as refrigerant, polarization process mesohigh electrode easily discharges to other position.Therefore need design high-field electrode in TSC (i.e. thermally stimulated current) test and be placed in high vacuum environment to ensure that polarization process mesohigh electrode does not discharge to other position of test macro.
In addition, in existing method of testing, need to destroy vacuum environment during each test and take out sample again, according to contact heat-transferring methods such as cooling baths, need sample to be pressed in cold trap, in test of many times process, easily wearing and tearing are caused to electrode structure, be also not easy to operation simultaneously.
Summary of the invention
The utility model provides a kind of electrode system measured for thermally stimulated current, is applicable to the thermally stimulated current measuring system adopting the contact type of cooling, can meet the requirement of ease for use and high cooling efficiency simultaneously.
The technical solution adopted in the utility model is:
This electrode system is arranged in vacuum chamber, and the bottom of vacuum chamber arranges cold trap; Connected by many support columns between upper flange and bottom electrode; Each support column is made up of the spring supporting post of epimere and the threaded post of hypomere, between spring supporting post and threaded post, arrange insulcrete; The center mounting center threaded post of insulcrete, installs sample between the lower end of center threaded post and bottom electrode; Tapped copper coin through insulcrete, and is installed in the upper end of center threaded post, tapped copper coin top installation high-voltage electrode in the upper end of center threaded post.
Described upper flange is connected with the roof of vacuum chamber, and bottom electrode is placed on cold trap.
Described high-field electrode and bottom electrode are parallel to each other.
Spring in described spring supporting post is low temperature spring.
The beneficial effects of the utility model are:
Described electrode system, the TSC that may be used in high vacuum chamber measures.The TSC testing reliability under high voltage polarization and the requirement of high cooling efficiency can be met, in ease for use, extendability and maintainability, have outstanding advantage again.
Accompanying drawing explanation
Fig. 1 is the structural representation of system described in the utility model.
Number in the figure:
1-upper flange; 2-spring supporting post; 3-high-field electrode; 4-insulcrete; 5-sample; 6-bottom electrode; 7-center threaded post; The tapped copper coin of 8-.
Embodiment
The utility model provides a kind of electrode system measured for thermally stimulated current, is described further the utility model below in conjunction with the drawings and specific embodiments.
The one-piece construction of described electrode system as shown in Figure 1.This electrode system is arranged in vacuum chamber, and the bottom of vacuum chamber arranges cold trap; Connected by many support columns between upper flange 1 and bottom electrode 6; Each support column is made up of the spring supporting post 2 of epimere and the threaded post of hypomere, arranges insulcrete 4 between spring supporting post 2 and threaded post, and the spring in spring supporting post 2 is low temperature spring; The center mounting center threaded post 7 of insulcrete 4, installs sample 5 between the lower end of center threaded post 7 and bottom electrode 6; Tapped copper coin 8 through insulcrete 4, and is installed in the upper end of center threaded post 7, tapped copper coin 8 top installation high-voltage electrode 3 in the upper end of center threaded post 7, and high-field electrode 3 and bottom electrode 6 are parallel to each other.Upper flange 1 is connected with the roof of vacuum chamber, and bottom electrode 6 is placed on cold trap.
During use, the position as the bottom electrode 6 of low-field electrode remains unchanged, and the upright position of high-field electrode 3 is then regulated by tapped copper coin 8.Because electrode is in vacuum cavity inside, the dielectric strength of high vacuum environment ensure that electrode can not to other parts generation flashover under high pressure (being not less than 20kV), punch-through.According to TSC test philosophy, the switching carrying out polarization loop and micro current loop is needed in test process, in the design, loop switch parts are arranged at beyond containment portion, simplify the design of vacuum chamber, ensure to work the mischief to micro current loop in polarization process simultaneously.
Whole electrode system can be taken out when changing sample, facilitate the replacing of sample and the maintenance work of electrode.Spring supporting post 2 can make the bottom electrode 6 in electrode system be close to refrigeration cold trap, ensures cooling efficiency; Meanwhile, the oxygen-free copper usually adopting hardness not high due to cold trap makes, and utilizes spring structure effectively can slow down cold trap and to be stressed the deformation occurred.
Fundamental measurement process is as follows:
(1) poling temperature T is heated to sample 5
p(about 50 DEG C, the material for variety classes, thickness may be different), and apply DC voltage and polarize;
(2) under polarizing voltage, lower temperature T is cooled to rapidly to sample 5
0(about-100 DEG C, the material for variety classes, thickness may be different) are to keep the space charge of sample inside;
(3) sample 5 two sections of voltages are down to 0, and do grounding and remove surface charge (internal space-charge due to low temperature can't discharge);
(4) electrometer and sample 5 is utilized to form loop to measure micro-electric current;
(5) with certain constant rate of speed heating sample 5 lentamente, the space charge in sample 5 constantly discharges.The relaxation of sample 5 and temperature have fixing funtcional relationship, so can obtain space charge information according to the release of the space charge (formed) electric current-temperature relation.
Claims (4)
1. for the electrode system that thermally stimulated current is measured, be arranged in vacuum chamber, and the bottom of vacuum chamber arranges cold trap, it is characterized in that, connected by many support columns between upper flange (1) and bottom electrode (6); Each support column is made up of the spring supporting post (2) of epimere and the threaded post of hypomere, arranges insulcrete (4) between spring supporting post (2) and threaded post; Center mounting center threaded post (7) of insulcrete (4), installs sample (5) between the lower end of center threaded post (7) and bottom electrode (6); The upper end of center threaded post (7) is through insulcrete (4), and in the upper end of center threaded post (7), tapped copper coin (8) is installed, tapped copper coin (8) top installation high-voltage electrode (3).
2. the electrode system measured for thermally stimulated current according to claim 1, it is characterized in that, described upper flange (1) is connected with the roof of vacuum chamber, and bottom electrode (6) is placed on cold trap.
3. the electrode system measured for thermally stimulated current according to claim 1, is characterized in that, described high-field electrode (3) and bottom electrode (6) are parallel to each other.
4. the electrode system measured for thermally stimulated current according to claim 1, it is characterized in that, the spring in described spring supporting post (2) is low temperature spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520027922.1U CN204359848U (en) | 2015-01-15 | 2015-01-15 | For the electrode system that thermally stimulated current is measured |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520027922.1U CN204359848U (en) | 2015-01-15 | 2015-01-15 | For the electrode system that thermally stimulated current is measured |
Publications (1)
| Publication Number | Publication Date |
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| CN204359848U true CN204359848U (en) | 2015-05-27 |
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| CN201520027922.1U Active CN204359848U (en) | 2015-01-15 | 2015-01-15 | For the electrode system that thermally stimulated current is measured |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061828A (en) * | 2017-12-12 | 2018-05-22 | 青岛科技大学 | Dielectric internal space-charge accumulated amount characterizing method |
| CN108760818A (en) * | 2018-05-18 | 2018-11-06 | 哈尔滨理工大学 | A kind of novel thermally stimulated current measuring device |
| CN109061273A (en) * | 2018-08-30 | 2018-12-21 | 哈尔滨理工大学 | A kind of automation thermally stimulated current test macro and its test method |
-
2015
- 2015-01-15 CN CN201520027922.1U patent/CN204359848U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061828A (en) * | 2017-12-12 | 2018-05-22 | 青岛科技大学 | Dielectric internal space-charge accumulated amount characterizing method |
| CN108760818A (en) * | 2018-05-18 | 2018-11-06 | 哈尔滨理工大学 | A kind of novel thermally stimulated current measuring device |
| CN108760818B (en) * | 2018-05-18 | 2020-09-11 | 哈尔滨理工大学 | Novel thermal stimulation current measuring device |
| CN109061273A (en) * | 2018-08-30 | 2018-12-21 | 哈尔滨理工大学 | A kind of automation thermally stimulated current test macro and its test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170112 Address after: 650200 Yunnan Province, Kunming city Guandu District Yun Road cloud electric science and Technology Park Patentee after: Electric Power Research Institute of Yunnan Power System Ltd Address before: 102206 Beijing City, Changping District Huilongguan Zhu Daxinzhuang 2 Patentee before: North-China Electric Power Univ. Patentee before: Electric Power Research Institute of Yunnan Power System Ltd |