CN106501645A - A kind of capacitor life-span and reliability evaluation system and method - Google Patents
A kind of capacitor life-span and reliability evaluation system and method Download PDFInfo
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- CN106501645A CN106501645A CN201610938435.XA CN201610938435A CN106501645A CN 106501645 A CN106501645 A CN 106501645A CN 201610938435 A CN201610938435 A CN 201610938435A CN 106501645 A CN106501645 A CN 106501645A
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Classifications
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- 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
- G01R31/003—Environmental or reliability tests
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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Abstract
The invention provides a kind of capacitor life-span and reliability evaluation system, the fabrication evaluation module, function detection module and the data acquisition module that are connected with the central processing unit including central processing unit and respectively；The central processing unit connection liquid crystal display station and hierarchical memory, the liquid crystal display platform include human-computer interactive control interface.The fabrication evaluation module includes LED detection light sources, high frequency non-destructive detection device and barcode scanner；The barcode scanner is connected with the hierarchical memory, and sweep capacitor name plate information.The present invention can carry out efficiently reliability detection to capacitor, being capable of combination property of the test capacitors under complicated site environment, overall merit its product quality, solve the rapid wear shortcoming of tuner, considerably increase the service life of whole railway capital construction coordination circuits, so as to extend the usage cycles of railway operation accessory, substantial amounts of manpower and material resources cost has been saved.
Description
Technical field
The present invention relates to capacitor unfailing performance assessment detection technique field, more particularly to a kind of capacitor life-span and reliability
Property assessment system and method.
Background technology
Track circuit is the circuit constituted as conductor with the rail of a section of railway track circuit, with orbit occupancy inspection, transmission
The function such as running information and traffic safety inspection.ZPW2000 track circuit equipments are the rails used on current China's Line for Passenger Transportation
Road circuit arrangement, its performance are directly connected to the efficiency and safety of China Railway High-speed transport, whether have train to track section
Judgement completed by discharger, reception device.Capacitor is the transmitting of signal and both tuning circuit weights of reception
Want whether the infringement of ingredient, capacitor there can be train to cause to judge by accident orbital region, serious meeting causes great equipment
Injures and deaths with personnel.
Electric capacity used in ZPW2000 tuning circuits be metallic film capacitor CBB102, CBB60F, metallized film
Capacitor is to plate very thin metal on medium, and winding is formed.Have high pressure resistant, high insulation resistance, impedance frequency characteristic good
（Less consignment inductance）, the big good stability of capacity, low-loss the features such as.But through this use of several years, find ZPW2000 rails
Problem appear to is that often occurs in road circuit tuning electric capacity：Metal spraying end face is disconnected into wire with the ablation of pole plate engagement edge, causes to lose
Effect is in the majority, and pole plate metal spraying exit large area ablation comes off and takes second place；Medium pernicious puncturing do not find, the accidental presence of spontaneous recovery point.
The life-span short slab of tuned cell is exactly this capacitor, and this capacitor manufacturer for using at present is only according to section of the former Ministry of Railways
Skill department No. 205 texts in 2007 ensure 5 years life-spans.Due to railway transportation extremely low to the Fault Tolerance of self-closing system, so after 5 years
The product will all descend road to change.
The patent of invention of Application No. 201210308206.1 discloses a kind of based on service data assessment power capacitor
The method of residual life, the method have taken into full account power capacitor medium temperature, the supply voltage of institute's connection system, the system back of the body
Scape harmonic wave, power capacitor operational defect, the impact for having run the time limit, revise the life index of power capacitor.By drawing
Life index, just can estimate the remaining service life of power capacitor, can also send early warning signal according to being actually needed, so as to
Take the necessary measures.
The patent of invention of Application No. 201510944398.9 proposes a kind of test technology of ultracapacitor, including such as
Lower step：S1, is numbered to ultracapacitor, and is stored in reservations database, enters S2 afterwards；S2, enters to ultracapacitor
Row charges, and enters S3 afterwards；S3, carries out high temperature ageing to ultracapacitor, enters S4 afterwards；S4, is carried out to ultracapacitor
Stand, after reaching the scheduled time, enter S5；S5, carries out performance test to ultracapacitor, according to test result to super capacitor
Device is classified.The test technology of above-mentioned ultracapacitor, compared with the test technology of conventional Super capacitor, increased test
Link, wherein, high temperature ageing and Standing operation can make that the performance of ultracapacitor is more stable, and service life is longer.
The patent of invention of Application No. 201010519930.X is related to capacitor testing method and its circuit.Implement at one
In mode, make closed-loop control system that operation is set with open loop.Certain time when operation is arranged with open loop,
AC signal in the output signal of system detectio system presence or absence of, so as to detection control loop element for example export
The failure of capacitor presence or absence of.
However, traditional capacitor life-span is carried out based on Weibull distributions with reliability assessment, using capacitor
Fail data is estimated the unknown parameter of distribution and further carries out reliability assessment to which.Because for the transmitting of high ferro signal, receiving
Metallization film capacitor require have long-life, high reliability the features such as, at short notice it is difficult to pass through accelerated life test
Obtain enough fail data, or even it sometimes appear that " zero failure " phenomenon, this just makes traditional to try based on the large sample life-span
The Statistical Inference for testing data there is difficulty in its life-span with reliability assessment, need a kind of brand-new scheme to realize right
The intelligent evaluation and optimizing research of metallic film capacitor reliability.
Content of the invention
It is an object of the invention to solving above-mentioned technical problem, there is provided a kind of capacitor life-span and reliability evaluation system and
Method, capacitor can be carried out efficiently reliability detection, can test capacitors comprehensive under complicated site environment
Can, overall merit its product quality.
For achieving the above object, the technical solution adopted in the present invention is：A kind of capacitor life-span and reliability assessment system
System, the fabrication evaluation module being connected with the central processing unit including central processing unit and respectively, function detection module sum
According to acquisition module；The central processing unit connection liquid crystal display station and hierarchical memory, the liquid crystal display platform include man-machine friendship
Mutual controlling interface.
Further, the fabrication evaluation module includes LED detection light sources, high frequency non-destructive detection device and bar code scanning
Instrument；The barcode scanner is connected with the hierarchical memory, and sweep capacitor name plate information.
Further, the function detection module includes electric detector unit, electromagnetic detecting unit and mechanical detection unit,
The electric detector unit includes over-voltage and over-current detector unit and earthing detection unit；The electromagnetic detecting unit includes electrostatic
Rifle, sparking electrode, discharge electrode and electromagnetic wave transmitter；The mechanical detection unit includes temperature detecting module, vibration detection mould
Block and stress detection module.
Further, the over-voltage and over-current detector unit includes LC ac capacitor Hi-pot Testers, Insulation Resistance Tester
With LCR digital electric bridges.
Further, the earthing detection unit includes common ground megameter and flashover breakdown assay device.
Further, the temperature detecting module includes high-low temperature test chamber, and the vibration detection module includes electronic shaking
Dynamic platform, the stress detection module include tubular ergometer.
Further, the data acquisition module includes data collecting card and connected sequential recording equipment, institute
State data collecting card to be connected with the hierarchical memory, record run case, programmed events and detecting event；The sequential record
Device includes that pulse generator and communication copy reading instrument, the communication copy reading instrument are connected with the hierarchical memory.
Further, the central processing unit connects statement analysiss signal generating unit, the statement analysiss signal generating unit and institute
State hierarchical memory connection.
A kind of capacitor life-span and reliability estimation method, assess in terms of two including technological process assessment and runnability,
Step is as follows：
1st, capacitor reliability evaluation system is relied on, introduces artificial intelligence neural networks and fault tree analysiss technology, set up and accelerate
Degradation experiment model and neural network prediction assessment models；
2nd, change test voltage and ambient temperature, humidity, in the case where failure mechanism is not changed, acceleration is carried out to product and is moved back
Change test, by test in the performance change value not measured in the same time；
3rd, it is capable of the characteristic of Approximation of Arbitrary Nonlinear Function using neutral net, carries out the modeling of Degradation path, and combine nerve
The stronger generalization ability of network and extrapolability prediction life of product；
4th, by the analysis of test result, metal spraying pressure, rifle are carried out away from, wire feed rate based on assessment models, can the parameter such as voltage
Life-span is calculated with reliability optimization, to be at optimum；
5th, the supplemental characteristic substitution after calculating will be optimized to be reappraised, will be adopted new technology and the product after structure parameter optimizing
Product carry out performance test again, and regression analyses are improved again by result.
A kind of capacitor life-span provided by the present invention and reliability evaluation system and method, relative to traditional capacitor
Life-span and reliability estimation method, have the advantages that accuracy height, instant effect, good test effect, are embodied in the following aspects：
1. the present invention program is met with whole product or 8 year life-span requiring more than high ferro user is as index, artificial by introducing
Intelligent Neural Network, carries out studying metallization film capacitor life-span and reliability assessment, so as to increased its data analysis capabilities
And computing function, the improvement for and guiding metallic film capacitor can be analysed in depth.
2. the present invention program is using brand-new test assessment theory, by change test voltage and ambient temperature and humidity come
Accelerate degradation failure method to calculate its reliability, burnt with pole plate engagement edge using the advanced technologies such as fault tree analysis metal spraying end face
Lose into the reason for wire disconnection and pole plate large area ablation.
3. the present invention program passes through the technique for studying existing metallic film capacitor；Using new design concept, improve
Production technology, such as using high temperature resistant HPP membrane media, evaporation adopts the plastics on new materials such as aluminum metallization dielectric film, in processing technique
Aspect adopts twin-core parallel-connection structure to reduce equivalent parallel resistance reduce loss to ensure that former overall dimensions are constant, adjusts instillation process
With optimize winding misalignment width, metal spraying pressure, rifle away from parameters such as, wire feed rate, voltages of energizing, to be at optimum.
4. the present invention program is simulated test, and carries out the life-span to parameter to operational factor, performance by setting up model
Calculate with reliability optimization, be computed result and substituted in performance test again, regression analyses are improved again to make result, until product
Life-span meets or 8 years performance requirements more than high ferro control system.
5. research and improvement of the present invention program by metallic film capacitor reliability, solves the easy of tuner
Shortcoming is damaged, the service life of whole railway capital construction coordination circuits is considerably increased, so as to extend the use of railway operation accessory
In the cycle, substantial amounts of manpower and material resources cost are saved.
Description of the drawings
Fig. 1 is the general structure schematic diagram of present system.
Fig. 2 is the structural representation of present system fabrication evaluation module.
Fig. 3 is the structural representation of present system function detection module.
Fig. 4 is the structural representation of present system data acquisition module.
Fig. 5 is the flow chart of the inventive method.
Specific embodiment
As shown in Figures 1 to 5, a kind of capacitor life-span and reliability evaluation system, including central processing unit 1 and respectively with
The fabrication evaluation module 2 of central processor connection, function detection module 6 and data acquisition module 19；Central processing unit 1 connects liquid crystal
Display station 24 and hierarchical memory 25, liquid crystal display platform 24 include human-computer interactive control interface.Hierarchical memory is according to content
The memorizer CAM being classified, this are a kind of special storage array RAM, and its groundwork mechanism is exactly to be input into one
Data item and all data item being stored in CAM differentiate the input data item with storage in CAM automatically while be compared
Whether data item matches, and exports the corresponding match information of the data item, is particularly suited for that data class is various, call complexity
Situation, this kind of memorizer can make central processing unit according to data category information that is to be recorded or calling, carry out data
Accurately extract, convenient and swift.
Fabrication evaluation module 2 includes LED detection light sources 3, high frequency non-destructive detection device 4 and barcode scanner 5；Bar code
Scanner 5 is connected with hierarchical memory 25, and sweep capacitor name plate information.Fabrication evaluation module include LED detection light source with
Barcode scanner.Barcode scanner is connected with hierarchical memory, and sweep capacitor name plate information, and nameplate material should be adopted
Aluminum or PC materials, top note should can be beaten using ink-jet for barcode scanner awareness information, meter bar code with two-dimensional bar code
Print or laser ablation mode, coding meet state's network technology condition and Q/GDW 205-2008《Electric energy metering device bar code will
Ask》；Can be selected using bar code or two-dimensional bar code according to physical condition using unit, it is ensured that bar code scan discrimination should be reached
100%；Meanwhile, in detection process, it is desirable to which nameplate is solid and reliable, smooth undeformed, without obvious cut, spot, printing symbol
Number word is clear, without obvious aberration；On nameplate, the information of all marks should meet state's net and Standard, including name of product type
Number, follow standard, the year built, metering licence, Business Name, voltage x current specification, accuracy class, meter constant, certification
The information such as mark should be accurate.
Function detection module 6 includes electric detector unit 7, electromagnetic detecting unit 8 and mechanical detection unit 9, electrically detects
Unit 7 includes over-voltage and over-current detector unit 10 and earthing detection unit 11；Electromagnetic detecting unit 8 includes static gun 12, electric discharge electricity
Pole 13, discharge electrode 14 and electromagnetic wave transmitter 15；Mechanical detection unit 9 includes temperature detecting module 16, vibration detection module 17
With stress detection module 18.Over-voltage and over-current detector unit includes LC ac capacitor Hi-pot Testers, Insulation Resistance Tester and LCR
Digital electric bridge.Earthing detection unit includes common ground megameter and flashover breakdown assay device.
For over-voltage and over-current is tested, capacitor should be able to bear the ac voltage withstanding test of regulation, and should meet GB/T
Approximate sine wave is answered in requirement in 17215.211 2006, test voltage, and frequency applies 1min between 45Hz and 65Hz.Examination
Flashover, spark discharge and punch-through should not occur in testing.In voltage-to-ground test, reference voltage is equal to or less than 40V's
Auxiliary line should be grounded.Three-phase intelligent capacitor should be able to bear the ac voltage withstanding test of regulation, should meet GB/T
Requirement in 17215.321 2008；Test voltage answers approximate sine wave, and frequency applies 1min between 45Hz and 65Hz.Examination
Flashover, spark discharge and punch-through should not occur in testing；In voltage-to-ground test, reference voltage is equal to or less than 40V's
Auxiliary line should be grounded.For the overcurrent test of capacitor, capacitor stands 30Imax（Franchise is+0～10%）In short-term
Overcurrent, half period of the application time for rated frequency, after test, capacitor should be without damage, normal work, and error changes
Amount is less than ± 1.5%.Ground detection module includes common ground megameter, suppresses energy for the anti-earth fault of test capacitors
Power, during test, current circuit setting electric current is 0. 5 In, and power factor is 1, symmetrical load.After test, capacitor should not
Occur damaging, and correctly should work.
Electromagnetic detecting unit includes static gun, sparking electrode, discharge electrode and electromagnetic wave transmitter；Electromagnetic detection be mainly into
Row capacitor electrostatic electric discharge immunity experiment and radio frequency electromagnetic field immunity experiment, discharge electrode be divided into the electric discharge of horizontal coupling plate and
To two kinds of vertical coupled plate, esd immunity experimental condition：Contact discharge voltage is ± 8KV, and sparking electrode is conical；
Atmospherical discharges voltage is ± 15KV；Sparking electrode is circle.Contact discharge typically adopts continuous discharge pattern, and atmospherical discharges are general
Using impulse discharge pattern；Before ESD test, panel should be added to ammeter.The appearance of the panel should be intact, flawless, most
The good panel from when dispatching from the factory, the close panel that optional specification and thickness are answered if not.In addition panel should also be furnished with
Whole sealing ring.Test method：Static discharge be applied only to operator normally using the point that may contact during Device under test and
On surface.The discharge electrode of contact electric discharge is divided into the electric discharge of horizontal coupling plate and to vertical coupled plate, and wherein, horizontal coupling plate is put
Electricity：By static gun point from the high left and right of test platen (aluminum or corrosion resistant plate) about 0.5-1CM（Standard is that rifle is sharp away from table 10CM, and 0 is high
Degree）, static gun to test platen can discharge, discharged round tested table, observation ammeter whether have exception；Vertical coupled plate is put
Electricity：Ammeter is away from vertical coupled plate 10cm（Standard）, in plate vertical edges midpoint, electric discharge, it is different whether observation ammeter has on static gun pinnacle
Often.When carrying out atmospherical discharges to ammeter, mainly for the gap of ammeter（Between upper box and back box）Positive and negative electric discharge is carried out, if band
There are LCDs, then need to be discharged at each position above nameplate, observation liquid crystal whether there is the abnormal phenomenas such as blank screen, Hua Ping.Penetrate
Frequency electromagnetic field immunity experiment mainly applies electromagnetic wave transmitter, loads nominal pulse electric current in current circuit；In voltage
Circuit adds reference voltage；The test voltage of voltage circuit is 4kV；Test period is 60s, it is desirable in the presence of impulse train, table
Meter continuously can be worked exactly, occur without any abnormal phenomena；In test, meter energy normal work, the error knots modification limit is not
Exceed following table；Before and after test, the data and parameter of meter are not any change, and ammeter does not reset.
Temperature detecting module includes that high-low temperature test chamber, vibration detection module include electric vibration table, stress detection module
Including tubular ergometer.Temperature detecting module is mainly used to carry out high temperature, low temperature and cyclic damp heat test, vibration detection module institute
The test for carrying out includes shaketalle test and impact test, and after test, capacitor should change without damage or information and can be correctly
Work.
Data acquisition module 19 includes data collecting card 20 and connected sequential recording equipment 21, data collecting card
It is connected with hierarchical memory, record run case, programmed events and detecting event；Sequential recording equipment 21 includes pulse generator
22 are connected with hierarchical memory 25 with communication copy reading instrument 23, communication copy reading instrument 23.The connection statement analysiss life of central processing unit 1
Into unit, statement analysiss signal generating unit is connected with hierarchical memory 25.Central processing unit connects statement analysiss signal generating unit, form
Analysis signal generating unit is connected with hierarchical memory, and form includes Parameter analysis and improvement project two parts, and Parameter analysis are according to examination
The related data that standard inspection will definitely go out, carries out standard analysiss comparison, sees whether Pass Test requirement；Improvement project then provides analysis knot
Really, corresponding collocation structure and improvement project is given, for the meter that can be still continuing with, simple improving or drop can be given
The evaluation that level is used.
The present invention program also includes a kind of capacitor life-span and reliability estimation method, assesses including technological process and runs
In terms of Performance Evaluation two, step is as follows：1st, capacitor reliability evaluation system is relied on, introduces artificial intelligence neural networks and failure
Tree analytical technology, sets up accelerated degradation test model and neural network prediction assessment models；2nd, test voltage and environment are changed
Temperature, humidity, in the case where failure mechanism is not changed, carry out accelerated degradation test to product, by test in different when
Carve the performance change value for measuring；Accelerated test is in the case of keeping product failure principle immovable, and sample is placed in high answering
A kind of test method so as to accelerate catalog to degenerate or fail is tested under power level.Its purpose seeks to quickly
Obtain test data and find out product failure reason, the accelerated test model using product is with the normal stress level to product
Under various dependability parameter indexs implement statistical inferences.3rd, it is capable of the spy of Approximation of Arbitrary Nonlinear Function using neutral net
Property, the modeling of Degradation path is carried out, and with reference to the stronger generalization ability of neutral net and extrapolability prediction life of product；4th, lead to
Cross the analysis of test result, carry out metal spraying pressure, rifle away from, wire feed rate based on assessment models, can the parameter such as voltage to the life-span with
Reliability optimization is calculated, to be at optimum；5th, the supplemental characteristic substitution after calculating will be optimized to be reappraised, will be adopted
Carry out performance test with the product after new technology and structure parameter optimizing again, and regression analyses are improved again by result.
This method be with whole product meet or more than high ferro user require 8 year life-span as index, by introduce people
Work intelligent Neural Network, carries out studying metallization film capacitor life-span and reliability assessment；Change test voltage and ambient temperature
Degradation failure method is accelerated to calculate its reliability with humidity；Using high temperature resistant HPP membrane media, it is deposited with and is situated between using aluminum metallization
The plastics on new materials such as matter thin film, adopt twin-core parallel-connection structure to ensure the constant reduction equivalent parallel of former overall dimensions in terms of processing technique
Resistance reduce loss, adjustment instillation process and optimizes winding misalignment width, and metal spraying pressure, rifle are away from, wire feed rate, voltage of energizing etc.
Parameter, to be at optimum.
Mainly studying a question for method is：Using the advanced technologies such as fault tree analysis metal spraying end face and pole plate engagement edge
The reason for ablation is into wire disconnection and pole plate large area ablation；The technique for studying existing metallic film capacitor；Using new
Design concept, improves production technology；Using network neural technology, calculate its reliability and and guide changing for metallic film capacitor
Enter.Be embodied as to carry out reliability to the method, its key problem in technology be following some：
1. reasonable distribution electric current and the security relationship of voltage, suitably reduce proof voltage, and reserving volume increases current load multiplying power.
2. the use environment in analysis tuning signal loop selects the satisfactory medium of performance, prevents capacitor dielectric pernicious
Puncture.
3. the thickness and appropriate voltage of energizing of medium is selected, increases its self-healing ability.
4. adjustment winding misalignment back gauge, metal spraying pressure, rifle are away from, wire feed rate.
5., using advanced Calculation of Reliability technology, the improvement that its reliability and guides metallic film capacitor is calculated.
Therefore, for key problem in technology, may finally determine carries out life-span and the technology after reliability assessment to capacitor
The improvement of route, the optimization of improvement and capacitor arrangement parameter including technological process：
Technological process after improvement is：Core particles coiling G（Inspection）→ core particles metal spraying and surface treatment T（Inspection）→ core particles thermal finalization → half
Finished product test → lead makes and welds (inspection) → auxiliary and assembling → dry and perfusion → finished product test is printed（Inspection）→ packaging
Warehouse-in.
The step of optimizing capacitor arrangement parameter includes：
（1）Performance degradation test is divided into some stages, the capacitor number participated in each stage by performance degradation EXPERIMENTAL DESIGN
Successively decrease successively, until very small amount capacitor completes the performance degradation test of long period, test specimen number is reduced to reach, saved
Test period and the purpose of testing expenses.The electrode of metallization film capacitor is to form one on organic film by evaporation means
The thick thin metals (aluminum or aluminum alloy) of 20～100 nm of layer, medium is usually organic film.Because film in the fabrication process cannot
There is the region with impurity or defect with avoiding, the part electric strength is relatively low, referred to as " electric weakness ".As voltage is raised,
Thin film at electric weakness is breakdown at first, forms larger current, causes localized hyperthermia, metal level to spread rapidly, and evaporation makes insulation
Layer recovers, and penetrating for part will not produce impact to whole capacitor, and this process is referred to as " spontaneous recovery ".To metallization film capacitor
Researching and analysing for self-healing feature can help us correctly to recognize its spontaneous recovery principle and life of product feature such that it is able to
Reliability consideration is carried out to which effectively.For those tests spend the high product of relatively expensive, life-span length and reliability, in work
Assessment is implemented to its reliability using properties of product degradation experiment generally in journey, this test method generally can be divided into some ranks
Section, uses sample number difference in each stage, usual product number is successively decreased successively.
（2）BS models are set up, Birnbaum-Saunders models (the abbreviation BS based on accelerated degradation test data is studied
Model) Statistical Inference that is distributed.In the case where failure mechanism is not changed, accelerated degradation test is carried out to product, is passed through
The performance change value not measured in the same time in test, research accelerate degradation failure model.Metallization film capacitor is negative in the cycle
Capacitance in the presence of load electric stress is gradually degenerated, and when capacitance degradation values are more than failure threshold, product occurs to degenerate and loses
Effect. in each duty cycle scope, capacitance degradation values that used load is brought are stochastic variables, this value
Affected by product processes, the size of stress, material correlated characteristic institute.In the specific implementation, can be by comparing metallization
The performance degradation mechanism of membrane capacitance and the fatigue crack growth phenomenon of material, introduce and apply in mechanical part fail-safe analysis
Extensive BS distributed models；With this model as relying on, the concept for accelerating equation and accelerated factor is introduced, and to joining in failure model
Number carries out statistical inference, the suitability of final certification this model in such capacitor research.
（3）Neural network prediction assessment models are set up, the metallization film capacitor Degradation path based on neutral net is studied
Modeling method.The characteristic for being capable of Approximation of Arbitrary Nonlinear Function using neutral net, carries out the modeling of Degradation path, and combines god
Through the stronger generalization ability of network and extrapolability prediction life of product.Solve the problems, such as that fail data is few, can be shorter
The estimated result of certain precision is obtained in time using less pendulous frequency, more efficiently assesses metallization film capacitor
Life-span and reliability.
（4）Optimize and calculate, metal spraying pressure, rifle is carried out away from, wire feed rate based on neural network prediction assessment models, can voltage
Life-span and reliability optimization are calculated etc. parameter, to be at optimum.To being adopted new technology and structure parameter optimizing
Product afterwards carries out performance test again, and regression analyses are improved again by result, until life of product meets or exceedes high ferro
8 years performance requirements of control system.
This programme by specific operation and is implemented, with good economic and social benefit：Chinese Railway to 2012
The built operation mileage in bottom is up to 9.8 ten thousand kilometers.The railway network planning that announces according to the former Ministry of Railways, the coming five years will have every year
5000 kilometers are built up operation, and only railway capital construction every year will 500,000,000,000 yuan of investment.
The metallic film capacitor of this project research is to be arranged on same control box with other devices of tuning circuit
In, once damaging, whole tuner is required for changing capacitor.General 4000 yuan or so of one tuner expense, each
Section has one receiving terminal of a transmitting terminal, section length 1km or so（800 to 1200 meters of practical situation length）.Following 5
Year, newly-built 5000km was calculated as 10000km by multiple line, took around 20000 sets of tuned cells.4000 sets every year on average.
The life-span short slab of tuned cell is exactly this capacitor, and this capacitor manufacturer for using at present is only according to original
Science and technology department of the Ministry of Railways No. 205 texts in 2007 ensure 5 years life-spans.Due to railway transportation extremely low to the Fault Tolerance of self-closing system,
So the product will all descend road to change after 5 years, such existing railway is calculated by multiple line and there are about 200000km per 5 years i.e. every year
400000 sets need to change.Therefore the expense spent by annual tuning capacity is about：400000 × 4000/5=3.2 (hundred million yuan)
If can extend 3 years by studying life of product, annual expense is about：Hundred million yuan of 400000 × 4000/8=2
, 1.2 hundred million yuan can be saved every year.
Presently preferred embodiments of the present invention is the foregoing is only, not in order to limiting the present invention, the general technology people of this area
Member it will be recognized that, many optional embodiments can also be realized using the solution of the present invention.All in the spirit and principles in the present invention
Within any modification, equivalent and the improvement made etc., should be included within the scope of the present invention.
Claims (9)
1. a kind of capacitor life-span and reliability evaluation system, it is characterised in that：Including central processing unit and respectively with described
The fabrication evaluation module of central processing unit connection, function detection module and data acquisition module；The central processing unit connection liquid
Brilliant display station and hierarchical memory, the liquid crystal display platform include human-computer interactive control interface.
2. a kind of capacitor life-span and reliability evaluation system as claimed in claim 1, it is characterised in that：The fabrication evaluation
Module includes LED detection light sources, high frequency non-destructive detection device and barcode scanner；The barcode scanner and the classification
Memorizer connects, and sweep capacitor name plate information.
3. a kind of capacitor life-span and reliability evaluation system as claimed in claim 1, it is characterised in that：The Function detection
Module includes that electric detector unit, electromagnetic detecting unit and mechanical detection unit, the electric detector unit include over-voltage and over-current
Detector unit and earthing detection unit；The electromagnetic detecting unit includes static gun, sparking electrode, discharge electrode and electromagnetic radiation
Device；The mechanical detection unit includes temperature detecting module, vibration detection module and stress detection module.
4. a kind of capacitor life-span and reliability evaluation system as claimed in claim 3, it is characterised in that：The over-voltage and over-current
Detector unit includes LC ac capacitor Hi-pot Testers, Insulation Resistance Tester and LCR digital electric bridges.
5. a kind of capacitor life-span and reliability evaluation system as claimed in claim 3, it is characterised in that：The earthing detection
Unit includes common ground megameter and flashover breakdown assay device.
6. a kind of capacitor life-span and reliability evaluation system as claimed in claim 3, it is characterised in that：The temperature detection
Module includes high-low temperature test chamber, and the vibration detection module includes electric vibration table, and the stress detection module includes tubular
Ergometer.
7. a kind of capacitor life-span and reliability evaluation system as claimed in claim 1, it is characterised in that：The data acquisition
Module includes that data collecting card and connected sequential recording equipment, the data collecting card are connected with the hierarchical memory
Connect, record run case, programmed events and detecting event；The sequential recording equipment includes pulse generator and communication copy reading work
Tool, the communication copy reading instrument are connected with the hierarchical memory.
8. a kind of capacitor life-span and reliability evaluation system as claimed in claim 1, it is characterised in that：The central authorities are processed
Device connects statement analysiss signal generating unit, and the statement analysiss signal generating unit is connected with the hierarchical memory.
9. a kind of capacitor life-span and reliability estimation method, it is characterised in that comment including technological process assessment and runnability
Estimate in terms of two, step is as follows：
1）Capacitor reliability evaluation system is relied on, artificial intelligence neural networks and fault tree analysiss technology is introduced, is set up and is accelerated
Degradation experiment model and neural network prediction assessment models；
2）Change test voltage and ambient temperature, humidity, in the case where failure mechanism is not changed, acceleration is carried out to product and is moved back
Change test, by test in the performance change value not measured in the same time；
3）The characteristic for being capable of Approximation of Arbitrary Nonlinear Function using neutral net, carries out the modeling of Degradation path, and combines nerve
The stronger generalization ability of network and extrapolability prediction life of product；
4）By the analysis of test result, metal spraying pressure, rifle is carried out away from, wire feed rate based on assessment models, can the parameter such as voltage
Life-span is calculated with reliability optimization, to be at optimum；
5）The supplemental characteristic substitution after calculating will be optimized to be reappraised, will be adopted new technology and the product after structure parameter optimizing
Product carry out performance test again, and regression analyses are improved again by result.
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| CN112162163A (en) * | 2020-09-24 | 2021-01-01 | 南京璞骏新能源技术有限公司 | Novel high-voltage direct-current capacitor large-current testing device |
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| CN108663580A (en) * | 2017-07-10 | 2018-10-16 | 山东光因照明科技有限公司 | Electrochemical capacitor life tester |
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| CN113203908A (en) * | 2021-05-06 | 2021-08-03 | 北京京东方光电科技有限公司 | Method, device, equipment and system for determining capacitor electrostatic discharge failure voltage |
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| CN113739842A (en) * | 2021-07-28 | 2021-12-03 | 湖北泰和电气有限公司 | Manufacturing monitoring system of ground detector |
| CN117169636A (en) * | 2023-09-28 | 2023-12-05 | 南京星梵电子科技有限公司 | Intelligent high temperature resistant aluminium electrolytic capacitor environment detecting system |
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