CN108133071A - A kind of hot emulation mode of aluminium electrolutic capacitor - Google Patents
A kind of hot emulation mode of aluminium electrolutic capacitor Download PDFInfo
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- CN108133071A CN108133071A CN201711088257.7A CN201711088257A CN108133071A CN 108133071 A CN108133071 A CN 108133071A CN 201711088257 A CN201711088257 A CN 201711088257A CN 108133071 A CN108133071 A CN 108133071A
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- aluminium electrolutic
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
- G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/08—Thermal analysis or thermal optimisation
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention discloses a kind of hot emulation modes of aluminium electrolutic capacitor, design aluminium electrolutic capacitor according to material characteristics, establish physical model；The physical-chemical reaction mechanism of the aluminium electrolutic capacitor course of work is then described with mathematical linguistics；Finally define different parameter simulation application scenes, and result is used for describing to the pottery resource of aluminium electrolutic capacitor, it is in concrete operations, then the thermal physical property parameter that aluminium electrolutic capacitor assembly material is obtained by experiment builds three-dimensional physical model, and assign each corresponding thermal physical property parameter of component in model, further according to heat conservation equation calculation obtain capacitor thermo parameters method and with color or other mark and represent to facilitate intuitive observation in a model.The present invention can effectively shorten time and the human cost of research；Meanwhile the real structure of basic principle and capacitor of the model based on thermal conduction study is built, accuracy is high.
Description
Technical field
The present invention relates to a kind of performance characterization method of aluminium electrolutic capacitor more particularly to a kind of aluminium electrolutic capacitor are hot
The simulating analysis of energy.
Background technology
Aluminium electrolutic capacitor has the function of filtering, bypass, coupling and fast charging and discharging in electronic circuit, and with body
Product is small, big, the cost-effective characteristic of storage electricity, be widely used in consumption electronic product, automation control, auto industry and
Photovoltaic etc..
In general, the performance of aluminium electrolutic capacitor is influenced by temperature very big, since itself is soft copy, is being worked
The temperature of inner core packet can gradually rise in the process, and the decline of life of product can be led to by being maintained at the condition of high temperature for a long time.How
The temperature change of the accurate evaluation aluminium electrolutic capacitor course of work is the hot issue of aluminium electrolutic capacitor research.Tradition obtains
The method of aluminium electrolutic capacitor temperature is to be tested using infrared thermal imaging or in capacitor surface using thermocouple, but by
It is the system of a sealing in aluminium electrolutic capacitor, what infrared thermography and thermocouple measurement obtained is the temperature of capacitor surface
Degree, it is difficult to internal temperature information is obtained, thus the statement of its image is not comprehensive.In addition, since aluminium electrolutic capacitor manufactures
Master operation include " nail volume-impregnation-group vertical-chemical conversion ", the processes such as cut, dry wherein also having, production week
Phase is longer；Meanwhile device detection is also required to the consumption regular hour.So that time cost is all higher.How a kind of energy is designed
Enough methods for quickly and accurately evaluating capacitor temperature performance, it has also become at present in industry one have to the technology captured hardly possible
Topic.
Invention content
Technical problem solved by the invention is to provide a kind of hot emulation mode of aluminium electrolutic capacitor, this method with
The mode of simulated experiment describes the thermal behavior of the aluminium electrolutic capacitor course of work, with solve traditional experiment test method long flow path,
The problem of time cost is high.
Technical problem solved by the invention is realized using following technical scheme：
A kind of hot emulation mode of aluminium electrolutic capacitor designs aluminium electrolutic capacitor according to material characteristics, establishes physics mould
Type；The physical-chemical reaction mechanism of the aluminium electrolutic capacitor course of work is then described with mathematical linguistics；Finally define different ginsengs
Variables model application scenarios, and result is used for describe the pottery resource of aluminium electrolutic capacitor.
It specifically includes following operating procedure：
Step 1, using experimental method or by material nameplate, obtain and prepare aluminium electrolutic capacitor as raw material
The thermal physical property parameter of various components material；
Step 2, the real structure based on aluminium electrolutic capacitor, establish three-dimensional physical model, and assign in model each group
Divide corresponding thermal physical property parameter；
Step 3, the working condition according to capacitor, test obtain the equivalent series impedance of capacitor；
Step 4, step 2 physical model carry out finite element grid subdivision, in each relevant finite element grid
Using heat conservation equation：Calculating analysis is carried out,
In formula：Parameter ρi, Cp,iAnd kiIt is the density, thermal capacitance and thermal conductivity factor of each component respectively；
And Q is heat generation rate, calculation formula is：
In formula, the volume that I is current density, V is capacitor, the equivalent series that R is the capacitor tested in step 2
Resistance；Meanwhile boundary condition and primary condition are added, carry out numerical computations.
Step 5 uses the evaluation in each finite element grid not in the three-dimensional physical model of aluminium electrolutic capacitor
With color or other mark, you can obtain the thermo parameters method of capacitor.
In the present invention, the aluminium electrolutic capacitor is rectangular aluminium electrolutic capacitor either cylindrical aluminium electrolytic capacitor
Either bolt-type aluminum electrolytic capacitor.
In the present invention, the assembly material of the aluminium electrolutic capacitor be for make aluminium electrolutic capacitor cathode foil,
Electrolytic paper, anode foil, aluminum metal case, rubber stopper.
In the present invention, the thermal physical property parameter of the assembly material of the aluminium electrolutic capacitor includes the thermal capacitance of material, heat conduction
Coefficient and density.
The advantages of the present invention are：
1st, the present invention can be with the temperature performance of rapid evaluation aluminium electrolutic capacitor, the low (experimental method of required time cost
Device, which is made, needs the time, and test is also required to the regular hour).
2nd, the real structure of basic principle and capacitor of the model based on thermal conduction study is built, and accuracy is high.It and can
With the variation of real-time dynamic response course of work capacitor internal temperature.(aluminium electrolutic capacitor is closed system, traditional experiment
Test method is pushed away by the way that test result is counter, predicts the internal variation occurred, it is impossible to realize real time monitoring)
3rd, reduce environmental Kuznets Curves and the human interference of experimentation, reproducibility and reliability are high.
Description of the drawings
Fig. 1 is the operating procedure schematic diagram of the present invention.
Fig. 2 is the capacitor bulk temperature field pattern of the embodiment of the present invention.
Fig. 3 is the capacitor internal section thermo parameters method figure of the embodiment of the present invention.
Fig. 4 is that the aluminium electrolutic capacitor of the different ratio of height to diameters of the embodiment of the present invention in environment temperature is 298.15K, 10A
The lines figure that internal temperature changes with time under operating mode current condition.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Conjunction be specifically illustrating and specific embodiment the present invention is further explained.
In embodiment, by taking height is 130mm, a diameter of 52mm is bolt-type aluminum electrolytic capacitor as an example, further
Illustrate the specific implementation process of the present invention.
The acquisition of step 1, aluminium electrolutic capacitor each component thermal physical property parameter.
In the present embodiment, capacitor is to be assembled into core packet by cathode foil, electrolytic paper, anode foil, and be impregnated with electrolyte it
It is packed into what aluminum shell encapsulation was formed afterwards.The heat of the components such as cathode foil, electrolytic paper, anode foil, aluminum shell and the cover board of sealing
Physical parameter can have an impact the Temperature Distribution of capacitor.The present invention measures cathode foil, anode foil, electrolytic paper by experiment
Thermal physical property parameter (including thermal capacitance, thermal conductivity factor and density), and parameter is represented as shown in table 1.
Table 1, in embodiment cathode foil, the thermal capacitance of anode foil and electrolytic paper, thermal conductivity factor and density
Step 2 establishes the three-dimensional physical model based on capacitor real structure, and assigns each component hot physical property ginseng accordingly
Number.Since the core packet of current aluminium electrolutic capacitor is mostly spiral shape, be by anode, electrolytic paper, cathode by way of winding
It is formed.In the physical model for establishing core packet, the section of core packet is obtained using Archimedes spiral equation, is then drawn
It stretches, obtains the threedimensional model of core packet；On this basis, the Whole structure model of capacitor is established.
Step 3, test obtain equivalent series resistance of the capacitor under specific working condition.
According to the working condition of capacitor, test to obtain the equivalent series resistance under the operating mode using digital electric bridge.
Step 4, numerical simulation calculate, and obtain the thermo parameters method of capacitor.
In the physical model established in step 2, using heat conservation equation：
As standard and specific numerical value substitute into and be calculated, in formula：Parameter ρi, Cp,iAnd kiIt is each group respectively
Density, thermal capacitance and the thermal conductivity factor divided, material nameplate when can detected by corresponding experiment or pass through purchase be known；
And Q is heat generation rate, calculation formula is：
In formula, I is current density, V is capacitor volume.
In the present embodiment, the average heat generation power of capacitor body is 10-5W/mm3, capacitor pass through outer surface with it is empty
The coefficient of gas heat loss through convection is 5W/ (m2*K)。
Residing environment when the subdivision of finite element grid is carried out to model, and being worked according to capacitor, adds perimeter strip
Part and primary condition carry out numerical computations, obtain the thermo parameters method of capacitor, wherein, the field distribution of capacitor bulk temperature is such as
Shown in Fig. 2, and capacitor internal section thermo parameters method is as shown in Figure 3.
By above-mentioned simulation calculation, the temperature value of capacitor different location can quickly, be intuitively obtained.
Based on the model and its emulated computation method, it can be estimated that different structure aluminium electrolutic capacitor is under same operating
Temperature change instructs the structure design of capacitor.
And can also carry out the subdivision of finite element grid according to model simultaneously on the architecture basics of Fig. 2, Fig. 3, it is different height
Diameter than aluminium electrolutic capacitor change with time in environment temperature for internal temperature under 298.15K, 10A operating mode current condition
As shown in Figure 4：
By carrying out a series of similar comparing calculations, can find under the working condition, the knot of temperature rise minimum
Structure designs.
And in the present embodiment, by the situation of Fig. 2, Fig. 3 and Fig. 4, it can quickly, intuitively obtain capacitor difference position
The temperature value put.
Basic principle, main feature and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (5)
1. the hot emulation mode of a kind of aluminium electrolutic capacitor, which is characterized in that design aluminium electrolutic capacitor according to material characteristics, build
Vertical physical model；The physical-chemical reaction mechanism of the aluminium electrolutic capacitor course of work is then described with mathematical linguistics；Finally define
Different parameter simulation application scenes, and result is used for describe the pottery resource of aluminium electrolutic capacitor.
2. the hot emulation mode of aluminium electrolutic capacitor according to claim 1, which is characterized in that specifically include following operation
Step：
Step 1, using experimental method or by material nameplate, obtain and prepare each of aluminium electrolutic capacitor as raw material
The thermal physical property parameter of assembly material；
Step 2, the real structure based on aluminium electrolutic capacitor, establish three-dimensional physical model, and assign each component phase in model
The thermal physical property parameter answered；
Step 3, the working condition according to capacitor, test obtain the equivalent series impedance of capacitor；
Step 4, step 2 physical model carry out finite element grid subdivision, applied in each relevant finite element grid
Heat conservation equation：Calculating analysis is carried out,
In formula：Parameter ρi, Cp,iAnd kiIt is the density, thermal capacitance and thermal conductivity factor of each component respectively；
And Q is heat generation rate, calculation formula is：
In formula, the volume that I is current density, V is capacitor, the equivalent series electricity that R is the capacitor tested in step 2
Resistance；Meanwhile boundary condition and primary condition are added, carry out numerical computations；
Step 5, by the evaluation in each finite element grid in the three-dimensional physical model of aluminium electrolutic capacitor with different face
Color or other mark, you can obtain the thermo parameters method of capacitor.
3. the hot emulation mode of the aluminium electrolutic capacitor according to claim 2, which is characterized in that the aluminium electrolutic capacitor
For rectangular aluminium electrolutic capacitor cylindrical aluminium electrolytic capacitor either bolt-type aluminum electrolytic capacitor.
4. the hot emulation mode of the aluminium electrolutic capacitor according to claim 2, which is characterized in that the aluminium electrolutic capacitor
Assembly material be for making the cathode foil of aluminium electrolutic capacitor, electrolytic paper, anode foil, aluminum metal case, rubber stopper.
5. the hot emulation mode of the aluminium electrolutic capacitor according to claim 2, which is characterized in that the aluminium electrolutic capacitor
The thermal physical property parameter of assembly material include thermal capacitance, thermal conductivity factor and the density of material.
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| CN201711088257.7A CN108133071A (en) | 2017-11-08 | 2017-11-08 | A kind of hot emulation mode of aluminium electrolutic capacitor |
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| CN201711088257.7A CN108133071A (en) | 2017-11-08 | 2017-11-08 | A kind of hot emulation mode of aluminium electrolutic capacitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110456734A (en) * | 2019-08-24 | 2019-11-15 | 南通苏尼康自动化技术有限公司 | A kind of electric melting pipe fittings process equipment controller and its control method |
| CN112580203A (en) * | 2020-12-16 | 2021-03-30 | 上海新时达电气股份有限公司 | Method and device for predicting temperature rise of electrolytic capacitor of frequency converter and storage medium |
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| CN110456734A (en) * | 2019-08-24 | 2019-11-15 | 南通苏尼康自动化技术有限公司 | A kind of electric melting pipe fittings process equipment controller and its control method |
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Effective date of registration: 20210323 Address after: 413000 Industrial Road, Heng Long New District, Heshan District, Yiyang, Hunan Applicant after: YIYANG WANJINGYUAN ELECTRONICS Co.,Ltd. Address before: 413000 Gongye 2nd Road, Henglong New District, Heshan District, Yiyang City, Hunan Province Applicant before: HUNAN KELIKAI TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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Application publication date: 20180608 |