CN105487019A - High-power power source module aging method and system - Google Patents
High-power power source module aging method and system Download PDFInfo
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- CN105487019A CN105487019A CN201610010089.9A CN201610010089A CN105487019A CN 105487019 A CN105487019 A CN 105487019A CN 201610010089 A CN201610010089 A CN 201610010089A CN 105487019 A CN105487019 A CN 105487019A
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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
- G01R31/40—Testing power supplies
Abstract
The invention discloses a high-power power source module aging method and system. The method includes the following steps that: the shell temperature working temperature range of high-power power source modules is obtained, and heat dissipation devices are set; the shell temperature measurement point positioning of the high-power power source modules is determined; the high-power power source modules are grouped according to the difference of measurement reference temperature of the high-power power source modules; and ageing testing is performed on each group of high-power power source modules, and the types of the heat dissipation devices are determined according to testing results. According to the high-power power source module aging method and system of the invention, a thermal characteristic testing and simulation and experimental verification-combined mode is adopted, so that problems in the prior art can be solved well.
Description
Technical field
The present invention relates to component reliability test field, refer to a kind of large power, electrically source module ageing method and system especially.
Background technology
Current, the ageing of existing power module mainly concentrates on low power devices, and large power, electrically source module is in that can survey can not the state of ageing substantially.Mainly because large power, electrically source module self-radiating is large, under full power and aging equipment carry radiating condition, power module shell temperature will exceed its normal range of operation, cause this generic module ageing problem still unresolved.
Summary of the invention
In view of this, the object of the invention is to propose a kind of large power, electrically source module ageing method and system, can be good at solving the problem by adopting the mode of thermal characteristics test and the checking of emulation binding tests.
Based on above-mentioned purpose a kind of large power, electrically source module ageing method provided by the invention, comprise step:
Obtain large power supply module case temperature operating temperature range, heat abstractor is set;
Determine large power supply module case temperature measurement point location;
Determine and according to the difference of large power, electrically source module witness mark temperature, divide into groups;
Carrying out aging test to often organizing large power, electrically source module, according to test findings, determining heat abstractor model.
In certain embodiments, described heat abstractor adopts the mode of heat transfer and air-cooled combination; Wherein, described heat transfer carries heat-radiating substrate by heat radiator contact large power, electrically source module and carrys out heat conduction, and selects the heat radiator of corresponding different size as emulation heat radiator according to different model specification power module; In addition, the described air-cooled heat radiation by regulating fan wind speed to realize large power, electrically source module.
In certain embodiments, describedly determine large power supply module case temperature measurement point location, comprising:
Obtain large power, electrically source module and carry the temperature of heat-radiating substrate physical centre position and the thermal self-restraint stress in large power supply module heat dissipating region;
Judge that large power, electrically source module carries temperature difference between the temperature of heat-radiating substrate physical centre position and large power supply module heat dissipating region maximum temperature and whether is greater than predetermined threshold value;
According to judged result, if be greater than predetermined threshold value, using heat dissipation region thermal self-restraint stress as shell temperature measurement point; If be not greater than predetermined threshold value, using heat-radiating substrate physical centre position as shell temperature measurement point.
In certain embodiments, the described difference according to large power, electrically source module witness mark temperature is divided into groups, and comprising:
According to different witness mark temperature, large power, electrically source module is divided into three groups and tests; By wherein one group large power supply module installation emulation heat radiator model, and with the conventional specification minimum spacing of heat radiator for stepping condition, respectively the heat radiator of the large power supply module installation of other two groups is got the heat radiator model be greater than and be less than under simulation value respective conditions.
In certain embodiments, describedly determine that heat abstractor model comprises: under the condition of different power consumption, carry out power ageing according to three groups of heat radiator, detect the shell temperature measurement point temperature value that all can meet power module in three groups of heat radiator under different power consumption condition, do not exceed the mxm. of shell temperature operating temperature range.
In addition, present invention also offers a kind of large power, electrically source module ageing system, comprising:
Heat abstractor setting unit, for obtaining large power supply module case temperature operating temperature range, arranges heat abstractor;
Shell temperature measurement point location unit, for determining large power supply module case temperature measurement point location;
Grouping aging test unit, for determining and according to the difference of large power, electrically source module witness mark temperature, dividing into groups; Aging test is carried out to often organizing large power, electrically source module;
Heat abstractor model determining unit, for according to test findings, determines heat abstractor model.
In certain embodiments, described heat abstractor setting unit adopts the mode of heat transfer and air-cooled combination; Wherein, described heat transfer carries heat-radiating substrate by heat radiator contact large power, electrically source module and carrys out heat conduction, and selects the heat radiator of corresponding different size as emulation heat radiator according to different model specification power module; In addition, the described air-cooled heat radiation by regulating fan wind speed to realize large power, electrically source module.
In certain embodiments, described shell temperature measurement point location unit also for:
Obtain large power, electrically source module and carry the temperature of heat-radiating substrate physical centre position and the thermal self-restraint stress in large power supply module heat dissipating region;
Judge that large power, electrically source module carries temperature difference between the temperature of heat-radiating substrate physical centre position and large power supply module heat dissipating region maximum temperature and whether is greater than predetermined threshold value;
According to judged result, if be greater than predetermined threshold value, using heat dissipation region thermal self-restraint stress as shell temperature measurement point; If be not greater than predetermined threshold value, using heat-radiating substrate physical centre position as shell temperature measurement point.
In certain embodiments, described grouping aging test unit also for:
According to different witness mark temperature, large power, electrically source module is divided into three groups and tests; By wherein one group large power supply module installation emulation heat radiator model, and with the conventional specification minimum spacing of heat radiator for stepping condition, respectively the heat radiator of the large power supply module installation of other two groups is got the heat radiator model be greater than and be less than under simulation value respective conditions.
In certain embodiments, during described heat abstractor model determining unit determination heat abstractor model, under the condition of different power consumption, power ageing is carried out according to three groups of heat radiator, detect the shell temperature measurement point temperature value that all can meet power module in three groups of heat radiator under different power consumption condition, do not exceed the mxm. of shell temperature operating temperature range.
As can be seen from above, a kind of large power, electrically source module ageing method provided by the invention and system, achieve a set of simple and easy to do, adopt the mode of thermal characteristics test and the checking of emulation binding tests, meet the large power, electrically source module aging test demand in production run.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of large power, electrically source module ageing method in the embodiment of the present invention;
Fig. 2 is the structural representation of large power, electrically source module ageing system in the embodiment of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
As the present invention another can the embodiment of reference, consult shown in Fig. 1, described large power, electrically source module ageing method can be following process:
Step 101, obtains large power supply module case temperature operating temperature range, arranges heat abstractor.
In an embodiment, after the subjects determining large power, electrically source module, just can obtain the information of dispatching from the factory of this subjects.Such as: choose subjects V24B36T200BL, consult device handbook known, model specification power module is specified is input as 24V for this, specified output is 36V, operating temperature range is-40 DEG C ~ 100 DEG C, and storage operating temperature range is-40 DEG C ~ 125 DEG C, and exemplary operation efficiency is 88%, rated power is 200W, belongs to low-voltage, high-current series high-power power module.This model power module possesses enable control pin, when PC pin is pulled down to below 2.3V, module will be in the state of closing down, simultaneously, its inside also comprises watchdog circuit, be in charge of input voltage, working temperature and internal running parameter, once monitored parameter exceeds the working range that it allows, module will turn off and PC pin will drag down.Whether PC periodically will raise and verify fault and be excluded, if fault is for getting rid of, PC will drag down again and the cycle repeats.
It should be noted that, the key of large power, electrically source module ageing scheme is the heat dissipation problem under its full power condition, namely requires that its shell temperature thermal self-restraint stress can not exceed its highest permission operating temperature range under full power condition.Therefore; when aging test conceptual design; should consider the shell temperature operating temperature range of module, the temperature rise caused due to power when avoiding device ageing state is too high and cause device shell temperature to exceed its operating temperature range, causes device to be in overheated self-shield (not working) state.As V24B36T200BL shell temperature peak can not more than 100 DEG C.
Preferably, in order to avoid overheated, the mode of heat transfer and air-cooled combination is adopted to dispel the heat.Wherein, heat transfer carries heat-radiating substrate by heat radiator contact large power, electrically source module and carrys out heat conduction, and the heating position due to module directly depends on that large power supply inside modules power circuit distributes.Preferably, directly obtain the shell heating region distribution of large power, electrically source module by thermal infrared imager, observe it and whether there is shell temperature distribution gradient and heating region characteristic distributions, thus determine the suitable installation site of shell temperature measurement point and heat radiator.Wherein, heat radiator is arranged on the region that large power, electrically source module needs to carry out dispelling the heat.In addition, the air-cooled heat radiation by regulating fan wind speed to realize large power, electrically source module.
As the present invention one preferably embodiment, Modling model in whole ageing oven, conveniently respectively organizes test figure across comparison.Simultaneously, for the consideration (test mission that equipment runs cannot be fixed) of cost (print price is very high) and existing hardware condition, final selection is the position of all group experiments from fan region farthest, mainly because Section Eight radiating condition poor (considering for maximum applicability) and be convenient to experimental observation and operation.Preferably, the fan maximum quantity of wind 41.6l/s of employing, maximum wind pressure 200pa, the parameter that device thermal resistance information uses actual measurement to obtain.
In addition, determine the heat radiator model meeting the correspondence of full power ageing under meeting existing air-cooled condition, the heat radiator of the corresponding different size of general different model specification power module.Namely the model of heat radiator can roughly be determined in this step.
Step 102, determines large power supply module case temperature measurement point location.
Preferably, thermopair is installed for detecting at the shell temperature measurement point place determined.Specific implementation process is as follows:
Step one: obtain large power, electrically source module and carry the temperature of heat-radiating substrate physical centre position and the thermal self-restraint stress in large power supply module heat dissipating region.
Preferably, the temperature that large power, electrically source module carries heat-radiating substrate physical centre position can be passed through to install thermopair in the middle of ageing fixture, is contacted by thermopair, thus obtain its temperature with basic physical centre position of dispelling the heat.
What deserves to be explained is, when measuring the thermal self-restraint stress in large power supply module heat dissipating region, can be shown in real time by infrared thermography.Preferably, because device heat-radiating substrate is that aluminium alloy belongs to material, surperficial unusual light, easily there is mirror-reflection on its surface in infrared waves, causes infrared thermography cannot the actual temperature in acquisition device surface.Therefore, the heat-radiating substrate of power module sticks black insulating tape, according to the principle of black absorption infrared waves, the heat distribution on heat-radiating substrate surface can be obtained by measurement.
Step 2: judge that large power, electrically source module carries temperature difference between the temperature of heat-radiating substrate physical centre position and large power supply module heat dissipating region maximum temperature and whether is greater than predetermined threshold value.
Step 3: according to judged result, if be greater than predetermined threshold value, using heat dissipation region thermal self-restraint stress as shell temperature measurement point; If be not greater than predetermined threshold value, using heat-radiating substrate physical centre position as shell temperature measurement point.
Step 103, determines and according to the difference of large power, electrically source module witness mark temperature, divides into groups.
Wherein, large power, electrically source module witness mark temperature be power module soon close to its shell temperature the highest permission working temperature (such as 100 DEG C) when, can free setting witness mark temperature, as 70,80,90 equitemperature points.
As embodiment, according to different witness mark temperature, large power, electrically source module is divided into three groups and tests.Preferably, by wherein one group large power supply module installation emulation heat radiator model.And with the conventional specification minimum spacing of heat radiator for stepping condition, respectively the heat radiator of the large power supply module installation of other two groups is got each two kinds of the heat radiator model be greater than and be less than under simulation value respective conditions.Wherein, emulate heat radiator and refer to the heat radiator selecting corresponding different size in a step 101 according to different model specification power module.
Therefore, by the test method of three groups of contrasts, analyze and determine to meet the test condition of relevant criterion requirement and the deviation of simulation value.
Step 104, carries out aging test to often organizing large power, electrically source module, obtains test findings.
In an embodiment, for the aging test often organized all (other each districts are in blank state) enforcement under same environment temperature (30 DEG C), same pilot region (Section Eight), same air-cooled condition, guarantee the transverse direction of all test figures and conclusion and longitudinal comparability.
Concrete grouping aging test is: when different power consumption, obtains input voltage, output voltage, electronic load and the shell temperature of often organizing large power, electrically source module respectively.Such as: respectively when power consumption is 100%, 80% and 50%, the data of the input voltage of three groups of large power, electrically source modules, output voltage, electronic load and shell temperature are gathered.
Step 105, according to test findings, determines heat abstractor model.Specifically:
Under the condition of different power consumption, power ageing is carried out according to three groups of heat radiator, detect the shell temperature measurement point which group of three groups of heat radiator all can meet power module under different power consumption condition and do not exceed its shell temperature working temperature mxm. (such as 100 DEG C), then the heat radiator model of this group is the heat radiator model finally determined.Thus, can accomplish that the model to the heat radiator installed is selected is finely tuned, to reach better radiating effect.
In another aspect of this invention, provide a kind of large power, electrically source module ageing system, consult shown in Fig. 2, described large power, electrically source module ageing system comprises the heat abstractor setting unit 201, shell temperature measurement point location unit 202, grouping aging test unit 203 and the heat abstractor model determining unit 204 that connect successively.Wherein, heat abstractor setting unit 201, for obtaining large power supply module case temperature operating temperature range, arranges heat abstractor.Shell temperature measurement point location unit 202 is for determining large power supply module case temperature measurement point location.Grouping aging test unit 203 is for determining and according to the difference of large power, electrically source module witness mark temperature, dividing into groups; Aging test is carried out to often organizing large power, electrically source module.Heat abstractor model determining unit 204, for according to test findings, determines heat abstractor model.
As embodiment, heat abstractor setting unit 201 adopts the mode of heat transfer and air-cooled combination.Preferably, heat transfer carries heat-radiating substrate by heat radiator contact large power, electrically source module and carrys out heat conduction, and selects the heat radiator of corresponding different size as emulation heat radiator according to different model specification power module.In addition, the air-cooled heat radiation by regulating fan wind speed to realize large power, electrically source module.
Preferably, when described shell temperature measurement point location unit 202 determines large power supply module case temperature measurement point location, can as follows:
Step one: obtain large power, electrically source module and carry the temperature of heat-radiating substrate physical centre position and the thermal self-restraint stress in large power supply module heat dissipating region.
Step 2: judge that large power, electrically source module carries temperature difference between the temperature of heat-radiating substrate physical centre position and large power supply module heat dissipating region maximum temperature and whether is greater than predetermined threshold value.
Step 3: according to judged result, if be greater than predetermined threshold value, using heat dissipation region thermal self-restraint stress as shell temperature measurement point; If be not greater than predetermined threshold value, using heat-radiating substrate physical centre position as shell temperature measurement point.
In another embodiment of system of the present invention, large power, electrically source module, according to different witness mark temperature, is divided into three groups and tests by grouping aging test unit 203.Preferably, by wherein one group large power supply module installation emulation heat radiator model.And with the conventional specification minimum spacing of heat radiator for stepping condition, respectively the heat radiator of the large power supply module installation of other two groups is got each two kinds of the heat radiator model be greater than and be less than under simulation value respective conditions.
For the aging test often organized all (other each districts are in blank state) enforcement under same environment temperature (30 DEG C), same pilot region (Section Eight), same air-cooled condition, guarantee the transverse direction of all test figures and conclusion and longitudinal comparability.
Concrete grouping aging test is: when different power consumption, obtains input voltage, output voltage, electronic load and the shell temperature of often organizing large power, electrically source module respectively.Such as: respectively when power consumption is 100%, 80% and 50%, the data of the input voltage of three groups of large power, electrically source modules, output voltage, electronic load and shell temperature are gathered.
As preferably embodiment, heat abstractor model determining unit 204 is according to the test findings of grouping aging test unit 203, detect the shell temperature measurement point which group of three groups of heat radiator all can meet power module under different power consumption condition and do not exceed its shell temperature working temperature mxm. (such as 100 DEG C), then the heat radiator model of this group is the heat radiator model finally determined.Thus, can accomplish that the model to the heat radiator installed is selected is finely tuned, to reach better radiating effect.
It should be noted that, at the concrete implementation content of large power, electrically source module ageing system of the present invention, describe in detail in large power, electrically source module ageing method recited above, therefore no longer illustrate at this duplicate contents.
In sum, a kind of large power, electrically source module ageing method provided by the invention and system, creatively can realize fast according to this invention and determine the ageing scheme of large power, electrically source module, shorten test design and proving time, substantially increase model and criticize large power, electrically source module aging test efficiency in production run; And, convenient and efficient, reliable; And, devise the firm locking mode between power module heat-radiating substrate, heat radiator and thermopair, while heat-radiating substrate and heat radiator good basis, by the electrical connection of thermopair and aging board, the real-time monitoring of power module in aging test process mesochite temperature can be realized.By the mode that thermal characteristics design is verified with emulation binding tests, substantially reduce the time of designing and developing, improve test efficiency; In addition, the present invention shortens the cycle that large power, electrically source module ageing scheme is determined, improves test efficiency; Finally, whole described large power, electrically source module ageing method and system compact, be easy to realize.
Those of ordinary skill in the field are to be understood that: the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a large power, electrically source module ageing method, is characterized in that, comprises step:
Obtain large power supply module case temperature operating temperature range, heat abstractor is set;
Determine large power supply module case temperature measurement point location;
Determine and according to the difference of large power, electrically source module witness mark temperature, divide into groups;
Carrying out aging test to often organizing large power, electrically source module, according to test findings, determining heat abstractor model.
2. method according to claim 1, is characterized in that, described heat abstractor adopts the mode of heat transfer and air-cooled combination; Wherein, described heat transfer carries heat-radiating substrate by heat radiator contact large power, electrically source module and carrys out heat conduction, and selects the heat radiator of corresponding different size as emulation heat radiator according to different model specification power module; In addition, the described air-cooled heat radiation by regulating fan wind speed to realize large power, electrically source module.
3. method according to claim 2, is characterized in that, describedly determines large power supply module case temperature measurement point location, comprising:
Obtain large power, electrically source module and carry the temperature of heat-radiating substrate physical centre position and the thermal self-restraint stress in large power supply module heat dissipating region;
Judge that large power, electrically source module carries temperature difference between the temperature of heat-radiating substrate physical centre position and large power supply module heat dissipating region maximum temperature and whether is greater than predetermined threshold value;
According to judged result, if be greater than predetermined threshold value, using heat dissipation region thermal self-restraint stress as shell temperature measurement point; If be not greater than predetermined threshold value, using heat-radiating substrate physical centre position as shell temperature measurement point.
4. method according to claim 3, is characterized in that, the described difference according to large power, electrically source module witness mark temperature is divided into groups, and comprising:
According to different witness mark temperature, large power, electrically source module is divided into three groups and tests; By wherein one group large power supply module installation emulation heat radiator model, and with the conventional specification minimum spacing of heat radiator for stepping condition, respectively the heat radiator of the large power supply module installation of other two groups is got the heat radiator model be greater than and be less than under simulation value respective conditions.
5. method according to claim 4, it is characterized in that, describedly determine that heat abstractor model comprises: under the condition of different power consumption, carry out power ageing according to three groups of heat radiator, detect the shell temperature measurement point temperature value that all can meet power module in three groups of heat radiator under different power consumption condition, do not exceed the mxm. of shell temperature operating temperature range.
6. a large power, electrically source module ageing system, is characterized in that, comprising:
Heat abstractor setting unit, for obtaining large power supply module case temperature operating temperature range, arranges heat abstractor;
Shell temperature measurement point location unit, for determining large power supply module case temperature measurement point location;
Grouping aging test unit, for determining and according to the difference of large power, electrically source module witness mark temperature, dividing into groups; Aging test is carried out to often organizing large power, electrically source module;
Heat abstractor model determining unit, for according to test findings, determines heat abstractor model.
7. system according to claim 6, is characterized in that, described heat abstractor setting unit adopts the mode of heat transfer and air-cooled combination; Wherein, described heat transfer carries heat-radiating substrate by heat radiator contact large power, electrically source module and carrys out heat conduction, and selects the heat radiator of corresponding different size as emulation heat radiator according to different model specification power module; In addition, the described air-cooled heat radiation by regulating fan wind speed to realize large power, electrically source module.
8. system according to claim 7, is characterized in that, described shell temperature measurement point location unit also for:
Obtain large power, electrically source module and carry the temperature of heat-radiating substrate physical centre position and the thermal self-restraint stress in large power supply module heat dissipating region;
Judge that large power, electrically source module carries temperature difference between the temperature of heat-radiating substrate physical centre position and large power supply module heat dissipating region maximum temperature and whether is greater than predetermined threshold value;
According to judged result, if be greater than predetermined threshold value, using heat dissipation region thermal self-restraint stress as shell temperature measurement point; If be not greater than predetermined threshold value, using heat-radiating substrate physical centre position as shell temperature measurement point.
9. system according to claim 8, is characterized in that, described grouping aging test unit also for:
According to different witness mark temperature, large power, electrically source module is divided into three groups and tests; By wherein one group large power supply module installation emulation heat radiator model, and with the conventional specification minimum spacing of heat radiator for stepping condition, respectively the heat radiator of the large power supply module installation of other two groups is got the heat radiator model be greater than and be less than under simulation value respective conditions.
10. system according to claim 9, it is characterized in that, during described heat abstractor model determining unit determination heat abstractor model, under the condition of different power consumption, power ageing is carried out according to three groups of heat radiator, detect the shell temperature measurement point temperature value that all can meet power module in three groups of heat radiator under different power consumption condition, do not exceed the mxm. of shell temperature operating temperature range.
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Application publication date: 20160413 |