CN102998599B - A kind of polypropylene metallized film capacitor detection method - Google Patents
A kind of polypropylene metallized film capacitor detection method Download PDFInfo
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- CN102998599B CN102998599B CN201110274844.1A CN201110274844A CN102998599B CN 102998599 B CN102998599 B CN 102998599B CN 201110274844 A CN201110274844 A CN 201110274844A CN 102998599 B CN102998599 B CN 102998599B
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Abstract
The present invention provides a kind of polypropylene metallized film capacitor detection method, by the most normal to capacitor internal polypropylene metallic film, it is judged that capacitor is the most qualified.The method is to be placed in the environment of uniform temperature by capacitor, test the breakdown voltage of its polypropylene metallic film, compare with predetermined breakdown voltage desired value according to breakdown voltage, judge that capacitor is the most qualified with this, when breakdown voltage is more than breakdown voltage desired value, then it is qualified to be judged as.
Description
Technical field
The invention belongs to detection technique field, particularly relate to the detection method of a kind of polypropylene metallized film capacitor.
Background technology
Polypropylene metallized film capacitor directly affects as " activate switch " of a lot of electrical equipment (such as air-conditioning), the quality of its quality
The normal use of electrical equipment, assesses the quality of capacitor quality at present, relies primarily on the durability type approval test of capacitor, and also do not have
There is a kind of preferably method of inspection energy rapid evaluation capacitor quality.Through the fault after sale of capacitor for many years in combination with capacitor
The main forms of durability damage, finds that the main form of expression of capacitor failure is that capacitor polypropylene metallic film lost efficacy,
It is thus desirable to a kind of method studying energy rapid evaluation capacitor quality, i.e. work out a kind of rapid evaluation capacitor polypropylene metal
The method of film quality.At present only control method to polypropylene metallic film, the deficiency that the method exists: 1, only in GB
The manufacturer or the capacitor manufacturer that are suitable for metal film enter factory's monitoring to the quality of metal film；2, the method is only suitable for film rolling
It is coiled into the fuse of low capacity (0.5 μ F ± 0.1 μ F), and is not suitable for the capacitor that condenser capacity is bigger；3, there is no phase
The technical standard value answered is suitable for capacitor metal film detection in capacitor user inspection and controls.
Summary of the invention
Present invention solves the technical problem that and be to provide a kind of polypropylene metallized film capacitor detection method, by polypropylene gold
Belong to the detection of thin film, it is possible to quickly detect that this capacitor is the most qualified.
The method of the sensing capacitor of the present invention, the polypropylene thickness of metal film of capacitor is U, and this detection method includes as follows
Step:
S1: capacitor is placed in the environment that temperature is T；Described temperature T meets, 50 DEG C≤T≤60 DEG C；
Breakdown voltage V of S2: test capacitors；
S3: by breakdown voltage desired value V of breakdown voltage V with capacitor ' compares, described breakdown voltage desired value
50U2* 95% volt≤V '≤50U2* 105% volt；
S4: as V >=V ', it is judged that capacitor is qualified；As V ＜ V ', it is judged that capacitor is defective.
In described explosion-proof tank, there is heater, for regulating the temperature in explosion-proof tank to temperature T.
Described temperature T is 55 DEG C
Further, in step sl, capacitor is positioned in explosion-proof tank, to ensure the safety of capacitor test experience.
Further, in step sl, the time being placed in by capacitor in the environment that temperature is T is not less than 4 hours, so that
The temperature of capacitor itself improves effectively to temperature T.
In step S2, capacitor two is terminated DC source, regulate the voltage at capacitor two ends, until breakdown potential container；
Wherein, the speed of the voltage at regulation capacitor two ends was less than 200VDC/ minute.
Utilize the detection method of the polypropylene metallized film capacitor that the present invention provides, can be quickly detected whether capacitor closes
Lattice, pass through the method simultaneously, it is also possible to as the appraisal procedure in advance of durability experiment, because polypropylene metallic film is defective
Also it is the major embodiment of durability initial failure.Therefore, the detection side of the polypropylene metallized film capacitor of present invention offer is provided
Method, the quality to the household electrical appliance using polypropylene metallized film capacitor, in the life-span etc., plays more preferable control action, more carries
High product quality, reduces hazard rate and is significant.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of capacitance detecting method of the present invention；
Detailed description of the invention
In assessment capacitor, the index of polypropylene metal thin-film quality mainly has: thickness, tensile strength, elongation at break, heat are received
Shrinkage, sheet resistance and dielectric strength.Because of capacitor in process of production, polypropylene metallic film can be extruded, stretch, if from one-tenth
Its thickness of sampling and testing, tensile strength, elongation at break, percent thermal shrinkage and sheet resistance on product, measured value can exist bigger with true value
Difference, it is impossible to as quality judging foundation.So, select and assess electric capacity by capacitor polypropylene metallic film breakdown voltage
Device quality.
Ask for an interview Fig. 1, the detection method of a kind of polypropylene metallized film capacitor that the present invention provides, use this method to polypropylene
Thickness of metal film U is that the detection process of the capacitor of 8 microns is as follows:
Prepare the explosion-proof tank of band heater in advance, open heater, explosion-proof tank is heated to 55 DEG C,
Step 1: capacitor is placed in 55 DEG C of explosion-proof tanks；
Step 2: wait 4 hours；
Step 3: capacitor two is terminated DC boosting device；
Step 4:: with 100VDC/ minute regulation voltage level, until capacitor breakdown；
Step 5: record breakdown voltage value V；
Step 6: carry out whether qualified judging, by breakdown voltage value V Yu 3040V (50*82* 95%) compare.
Before step 1, it is also possible to first capacitor is placed in explosion-proof tank, then explosion-proof tank is heated to 55 DEG C, equally certainly,
Experiment demand can be met.
Have chosen the capacitor of 8 micron thickness polypropylene metallic films of different size 60, testing result is as follows:
From in upper table, the breakdown voltage value V capacitor less than 3040V, it is substandard product.To above-mentioned defective product
Product carry out durability experiment with other products of batch, and result is also shown as substandard product, demonstrate the inspection that the present invention provides
The accuracy of survey method.
In like manner, it would however also be possible to employ identical step, the polypropylene metallized film capacitor of other thickness is detected, detected
Journey does not repeats them here.
Above-mentioned listed specific implementation is nonrestrictive, it will be apparent to those skilled in the art that without departing from the scope of the invention
In, the various modifications and variations carried out, belong to protection scope of the present invention.
Claims (6)
1. a detection method for polypropylene metallized film capacitor, the polypropylene thickness of metal film of described capacitor is U micron, its
Being characterised by, described detection method comprises the steps:
S1: capacitor is placed in the environment that temperature is T；Described temperature T meets, 50 DEG C≤T≤60 DEG C；
Breakdown voltage V of S2: test capacitors；
S3: by breakdown voltage desired value V of breakdown voltage V with capacitor ' compares, described breakdown voltage desired value
50U2* 95% volt≤V '≤50U2* 105% volt；
S4: as V >=V ', it is judged that capacitor is qualified；As V ＜ V ', it is judged that capacitor is defective.
2. polypropylene metallized film capacitor detection method as claimed in claim 1, it is characterised in that: in step S1, by electric capacity
Device is positioned in explosion-proof tank.
3. polypropylene metallized film capacitor detection method as claimed in claim 2, it is characterised in that: have in described explosion-proof tank and add
Thermal, for regulating the temperature in explosion-proof tank to temperature T.
4. polypropylene metal thin film capacitor detection method as claimed in claim 1, it is characterised in that: described temperature T is 55 DEG C
5. polypropylene metal thin film capacitor detection method as claimed in claim 1, it is characterised in that: in step S1, by capacitor
The time being placed in the environment that temperature is T is at least 4 hours.
6. polypropylene metal thin film capacitor detection method as claimed in claim 1, it is characterised in that: in step S2, by capacitor
Two termination DC sources, the voltage at regulation capacitor two ends, until breakdown potential container；
Wherein, the speed of the voltage at regulation capacitor two ends was less than 200VDC/ minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110274844.1A CN102998599B (en) | 2011-09-16 | 2011-09-16 | A kind of polypropylene metallized film capacitor detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110274844.1A CN102998599B (en) | 2011-09-16 | 2011-09-16 | A kind of polypropylene metallized film capacitor detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102998599A CN102998599A (en) | 2013-03-27 |
| CN102998599B true CN102998599B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110274844.1A Expired - Fee Related CN102998599B (en) | 2011-09-16 | 2011-09-16 | A kind of polypropylene metallized film capacitor detection method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112731033B (en) * | 2020-12-25 | 2022-07-19 | 山东胜利通海集团东营天蓝节能科技有限公司 | Intelligent high-temperature-resistant film capacitor detection system |
| CN113358955A (en) * | 2021-06-02 | 2021-09-07 | 格力电器（合肥）有限公司 | Method for detecting reliability of electrolytic capacitor |
| CN113358159A (en) * | 2021-07-08 | 2021-09-07 | 无锡市电力滤波有限公司 | Method for inspecting metallized polypropylene film for direct-current support capacitor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1153393A (en) * | 1995-10-06 | 1997-07-02 | 松下电器产业株式会社 | Capacitor |
| CN101226218A (en) * | 2007-12-28 | 2008-07-23 | 西安电力机械制造公司 | Method for testing life of power condenser element |
-
2011
- 2011-09-16 CN CN201110274844.1A patent/CN102998599B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1153393A (en) * | 1995-10-06 | 1997-07-02 | 松下电器产业株式会社 | Capacitor |
| CN101226218A (en) * | 2007-12-28 | 2008-07-23 | 西安电力机械制造公司 | Method for testing life of power condenser element |
Non-Patent Citations (1)
| Title |
|---|
| 《薄膜电容直流耐压测试仪的原理与实现》;王晓东;《电子工业专用设备》;20100228;17-20 * |
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| CN102998599A (en) | 2013-03-27 |
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