CN109492282A - A kind of DC/DC power module life assessment Primary Component determines method - Google Patents
A kind of DC/DC power module life assessment Primary Component determines method Download PDFInfo
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- CN109492282A CN109492282A CN201811264794.7A CN201811264794A CN109492282A CN 109492282 A CN109492282 A CN 109492282A CN 201811264794 A CN201811264794 A CN 201811264794A CN 109492282 A CN109492282 A CN 109492282A
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- 238000004458 analytical method Methods 0.000 claims abstract description 41
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- 238000011160 research Methods 0.000 claims abstract description 5
- 230000007246 mechanism Effects 0.000 claims abstract description 4
- 238000002076 thermal analysis method Methods 0.000 claims abstract description 4
- 230000008646 thermal stress Effects 0.000 claims abstract description 4
- 238000004088 simulation Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 claims description 7
- 230000001133 acceleration Effects 0.000 claims description 6
- 238000004146 energy storage Methods 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
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- 238000012805 post-processing Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
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- 238000010438 heat treatment Methods 0.000 claims description 2
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- 238000011156 evaluation Methods 0.000 claims 1
- 239000010433 feldspar Substances 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 5
- 238000005070 sampling Methods 0.000 description 3
- 239000003985 ceramic capacitor Substances 0.000 description 2
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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
- G06F2119/04—Ageing analysis or optimisation against ageing
Abstract
The invention discloses a kind of DC/DC power module life assessment Primary Components to determine method, comprising: DC/DC power module Failure mode and failure mechanism analysis；It is determined based on the life assessment Primary Component of PSpice, is determined based on the life assessment Primary Component of ANSYS, mainly include the DC/DC power module modeling based on SolidWorks and the power module steady-state thermal analysis based on ANSYS；Research is determined based on the life assessment Primary Component of ANSYS Workbench；The analysis result of electric stress, thermal stress and vibration stress etc. is taken or collected, it may be determined that DC/DC power module life assessment Primary Component.The present invention provides new method for the determination of the life assessment Primary Component of DC/DC power module, provides new approach for DC/DC power module life assessment.
Description
Technical field
The present invention relates to a kind of life assessment Primary Components to determine method, and especially a kind of DC/DC power module service life comments
Valence Primary Component determines method.
Background technique
It is limited to device production producer technical reason, the determination of DC/DC power module life assessment Primary Component is always
Problem；Conventional method is usually failure analysis, summary of experience；The life assessment of power module is typically also to carry out accelerated aging examination
It tests or accelerated degradation test；Test sample is more, test period is long, experimentation cost is high；And by power module working environment
Analysis, the main method by emulation determine the Primary Component for influencing its service life under main environment stress, and the time is short, cost
It is low, simple and easy to do.
Patent No. CN201310101111.7, entitled " a kind of real-time monitoring closed-loop control system and its working method "
Patent in record, the invention include power supply, power inverter, output filter-rectifier, sampling network, comparator, PWM control
Device and driver processed, the power inverter, output filter-rectifier, sampling network, comparator, PWM controller and driver
Primary to be connected, the power supply includes input terminal supply voltage and output end power voltage, and the power inverter and input terminal are electric
Source voltage is electrically connected, and the output end power voltage is connected between output filter-rectifier and sampling network.Using closed loop
Transmission function measured result establishes the dynamic model of Primary Component failure and power-fail.This method in the application, with online
Closed loop test mode can only be surveyed online, and be tested for power module itself, have situation defect.
Summary of the invention
In order to solve the above technical problems, determining Primary Component quickly and accurately precisely to assess the service life of power module, sheet
Invention provides a kind of DC/DC power module life assessment Primary Component and determines method.
The present invention is that a kind of DC/DC power module life assessment Primary Component determines method, comprising:
Step 102, DC/DC power module Failure mode and failure mechanism analysis；
Step 104, it is determined based on the life assessment Primary Component of PSpice；
Step 106, it is determined based on the life assessment Primary Component of ANSYS, mainly includes the DC/DC based on SolidWorks
Power module modeling and the power module steady-state thermal analysis based on ANSYS；
Step 108, research is determined based on the life assessment Primary Component of ANSYS Workbench；
Step 110, the analysis result of electric stress, thermal stress and vibration stress etc. is taken or is collected, it may be determined that DC/DC power supply mould
Block life assessment Primary Component.
Preferably, in the step 102, impact analysis including external environment to DC/DC, including electrical over-stress, temperature,
Vibration and mechanical shock, electromagnetic interference, humidity and sand and dust.
Preferably, in the step 102, the failure analysis including internal component etc., including magnetic element, Surface Mount member
Part, thick film surface-mount resistor, monolithic ceramic capacitor, switching tube and diode, plastic device and substrate, bonding point.
Preferably, it in the step 104, specifically includes, the simulating schematic diagram established using PSpice, calls related first device
The model of part, high frequency transformer and inductance establishes circuit simulation schematic diagram, carries out transient analysis, and each main devices are analyzed in monitoring
Key point waveform.
Preferably, in the step 104, main devices key point includes oscillator output, optocoupler electric current, MOSFET power
Switching tube drain voltage, rectifying tube output voltage, electric current and capacitance current on energy storage inductor.
Preferably, in the step 104, power switch tube, diode, output capacitance, energy storage inductor etc. are carried out respectively
Parameter sweep analysis studies influence of the Parameters variation to circuit, and electric stress can be obtained by summarizing to PSpice Simulation results
Act on lower DC/DC power module life assessment Primary Component.
Preferably, in the step 106, the model simplification under temperature stress is carried out to power module, reads in or creation is electric
Source module 3D model, definition and allocation unit type and material properties carry out boolean calculation to model, grid division, apply
Lotus and boundary condition, solution and post-processing are loaded, simulation analysis can obtain the main fever in power module inside at a temperature of different operating
Device in conjunction with device operating temperature and device junction temperature, and then can be closed with power module life assessment under temperature stress
Key device.
Preferably, in the step 108, the model simplification under vibration stress is carried out to power module, reads in or creation is electric
Source module 3D model, definition and allocation unit type and material properties, grid division, apply load and boundary condition, solve and
Post-processing.
Preferably, in the step 108, progress Modal Analysis analysis first can obtain 6 rank mode of oscillation frequencies before power module
Rate and Mode Shape, in front on the basis of model analysis, according to the power spectrum curve given in GJB150, in ANSYS
Excitation is established in Workbench, adds the excitation of power spectral acceleration, after the completion of solution, available random vibration point for model
The random response cloud atlas perpendicular to orientation substrate, the weak link under available vibration stress are analysed, analysis and summary can obtain at random
Vibrate lower power module life assessment Primary Component.
Preferably, in the step 108, the random response cloud atlas be speed responsive cloud atlas, acceleration responsive cloud atlas and
Equivalent stress responds cloud atlas.
In conclusion above-mentioned technical proposal is used, and it is more scientific compared with the methods of traditional summary of experience more accurate, it compares
In the test method of the life assessment of previous power module, the present invention is main logical by the analysis to power module working environment
The method for crossing emulation determines the Primary Component in its service life of influence under main environment stress, and the time is short, at low cost, simple and easy to do.
Detailed description of the invention
Fig. 1 is that a kind of DC/DC power module life assessment Primary Component of one embodiment of the invention determines that method is implemented
The schematic diagram of step.
Specific embodiment
DC/DC power module life assessment Primary Component determines that method mainly includes the following aspects:
Firstly, DC/DC power module Failure mode and failure mechanism analysis.First is that influence of the external environment to DC/DC point
Analysis, including electrical over-stress, temperature, vibration and mechanical shock, electromagnetic interference, humidity and sand and dust etc..Second is that internal member
The failure analysis of device etc., including magnetic element, sticking-element, thick film surface-mount resistor, monolithic ceramic capacitor, switching tube and two poles
Pipe, plastic device and substrate, bonding point etc..
Secondly, the life assessment Primary Component based on PSpice determines.The simulating schematic diagram established using PSpice is called
The model of related component, high frequency transformer and inductance establishes circuit simulation schematic diagram, carries out transient analysis, and monitoring analysis is each
Main devices key point waveform, such as oscillator output, optocoupler electric current, MOSFET power switch tube drain voltage, rectifying tube output
Electric current, capacitance current etc. on voltage, energy storage inductor.The circuit of front complexity is simplified, respectively to power switch tube, two poles
Pipe, output capacitance, energy storage inductor etc. carry out parameter sweep analysis, study influence of the Parameters variation to circuit.To PSpice circuit
Simulation result, which is summarized, can obtain DC/DC power module life assessment Primary Component under electric stress acts on.
Then, it is determined based on the life assessment Primary Component of ANSYS, mainly includes the DC/DC electricity based on SolidWorks
Source module modeling and the power module steady-state thermal analysis based on ANSYS.Because power module internal structure is complicated, for the ease of limited
The division of first grid carries out the model simplification under temperature stress to power module；Read in or create power module 3D model, definition
And allocation unit type and material properties, boolean calculation, grid division are carried out to model, apply load and boundary condition,
It solves and post-processes.Simulation analysis can obtain the main heating device in power module inside at a temperature of different operating, work in conjunction with device
Temperature and device junction temperature etc., and then can be with power module life assessment Primary Component under temperature stress.
In addition, the life assessment Primary Component based on ANSYS Workbench determines research.Power module is vibrated
Model simplification under stress is read in or is created power module 3D model, definition and allocation unit type and material properties, divides net
Lattice apply load and boundary condition, solution and post-processing.Modal Analysis analysis is carried out first, and 6 ranks are vibrated before can obtaining power module
Modal frequency and Mode Shape.In front on the basis of model analysis, the power spectrum curve given in foundation GJB150,
Excitation is established in ANSYS Workbench；The excitation of power spectral acceleration is added for model, it is available random after the completion of solution
Random response cloud atlas (speed responsive cloud atlas, acceleration responsive cloud atlas and equivalent stress sound of the vibration analysis perpendicular to orientation substrate
Answer cloud atlas), the weak link under available vibration stress.Analysis and summary can obtain power module life assessment under random vibration and close
Key device.
Finally, the analysis result of electric stress, thermal stress and vibration stress etc. is taken or is collected, it may be determined that DC/DC power module
Life assessment Primary Component.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of DC/DC power module life assessment Primary Component determines method characterized by comprising
Step 102, DC/DC power module Failure mode and failure mechanism analysis；
Step 104, it is determined based on the life assessment Primary Component of PSpice；
Step 106, it is determined based on the life assessment Primary Component of ANSYS, mainly includes the DC/DC power supply based on SolidWorks
Module modeling and the power module steady-state thermal analysis based on ANSYS；
Step 108, research is determined based on the life assessment Primary Component of ANSYS Workbench；
Step 110, the analysis result of electric stress, thermal stress and vibration stress etc. is taken or is collected, it may be determined that the DC/DC power module longevity
Life evaluation Primary Component.
2. DC/DC power module life assessment Primary Component described in accordance with the claim 1 determines method, which is characterized in that institute
It states in step 102, the impact analysis including external environment to DC/DC, including electrical over-stress, temperature, vibration and mechanical shock, electricity
Magnetic disturbance, humidity and sand and dust.
3. DC/DC power module life assessment Primary Component determines method according to claim 2, which is characterized in that institute
State in step 102, the failure analysis including internal component etc., including magnetic element, sticking-element, thick film surface-mount resistor, solely
Feldspar capacitor, switching tube and diode, plastic device and substrate, bonding point.
4. DC/DC power module life assessment Primary Component described in accordance with the claim 1 determines method, which is characterized in that institute
It states in step 104, specifically includes, the simulating schematic diagram established using PSpice calls related component, high frequency transformer and electricity
The model of sense establishes circuit simulation schematic diagram, carries out transient analysis, and each main devices key point waveform is analyzed in monitoring.
5. DC/DC power module life assessment Primary Component determines method according to claim 4, which is characterized in that institute
It states in step 104, main devices key point includes oscillator output, optocoupler electric current, MOSFET power switch tube drain voltage, whole
Electric current and capacitance current on flow tube output voltage, energy storage inductor.
6. DC/DC power module life assessment Primary Component determines method according to claim 4, which is characterized in that institute
It states in step 104, parameter sweep analysis, research is carried out to power switch tube, diode, output capacitance, energy storage inductor etc. respectively
Influence of the Parameters variation to circuit, electric stress can be obtained by, which summarizing to PSpice Simulation results, acts on lower DC/DC power supply mould
Block life assessment Primary Component.
7. DC/DC power module life assessment Primary Component described in accordance with the claim 1 determines method, which is characterized in that institute
It states in step 106, the model simplification under temperature stress is carried out to power module, read in or create power module 3D model, definition
And allocation unit type and material properties, boolean calculation, grid division are carried out to model, apply load and boundary condition,
It solves and post-processing, simulation analysis can obtain the main heating device in power module inside at a temperature of different operating, work in conjunction with device
Temperature and device junction temperature, and then can be with power module life assessment Primary Component under temperature stress.
8. DC/DC power module life assessment Primary Component described in accordance with the claim 1 determines method, which is characterized in that institute
It states in step 108, the model simplification under vibration stress is carried out to power module, read in or create power module 3D model, definition
And allocation unit type and material properties, grid division, apply load and boundary condition, solution and post-processing.
9. DC/DC power module life assessment Primary Component determines method according to claim 6, which is characterized in that institute
It states in step 108, progress Modal Analysis analysis first can obtain 6 rank vibration modal frequencies and Mode Shape before power module, preceding
On the basis of the model analysis of face, according to the power spectrum curve given in GJB150, excitation is established in ANSYS Workbench,
Add the excitation of power spectral acceleration for model, after the completion of solution, available random vibration analysis perpendicular to orientation substrate with
Machine responds cloud atlas, the weak link under available vibration stress, and analysis and summary can obtain the power module service life under random vibration and comment
Valence Primary Component.
10. DC/DC power module life assessment Primary Component determines method according to claim 7, which is characterized in that institute
It states in step 108, the random response cloud atlas is that speed responsive cloud atlas, acceleration responsive cloud atlas and equivalent stress respond cloud atlas.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115526080A (en) * | 2022-10-17 | 2022-12-27 | 哈尔滨工业大学 | Switching power supply reliability prediction method based on multi-physical-field digital prototype model |
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2018
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Inventor after: Diao Shenglong Inventor after: Tong Yu Inventor after: Lv Ying Inventor after: Jiang Min Inventor before: Diao Shenglong Inventor before: Tong Yu Inventor before: Jiang Min |
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Application publication date: 20190319 |