CN106771646A - Power device loss test mthods, systems and devices - Google Patents
Power device loss test mthods, systems and devices Download PDFInfo
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- CN106771646A CN106771646A CN201611252584.7A CN201611252584A CN106771646A CN 106771646 A CN106771646 A CN 106771646A CN 201611252584 A CN201611252584 A CN 201611252584A CN 106771646 A CN106771646 A CN 106771646A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
- G01R27/2694—Measuring dielectric loss, e.g. loss angle, loss factor or power factor
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Abstract
The invention provides a kind of power device loss test mthods, systems and devices, wherein, power device loss test method, including：When acquisition power device is in running order, power device is arranged on water-cooling base plate, first temperature difference at the corresponding water-cooling base plate two ends of power device；After water-cooling base plate cooling, heating module substitution power device is arranged on water-cooling base plate, the electric current that regulation heating module passes through so that the temperature difference at water-cooling base plate two ends is the first temperature difference；According to the electric current by heating module, the loss of power device is determined.The power device loss test method that the present invention is provided is measured under the actual working condition of power device, in avoiding existing power device loss test, because working condition and the actual condition of computer software simulation power device have a difference, and the error brought.So as to the power device loss test method that the present invention is provided improves the accuracy rate of power device loss test.
Description
Technical field
The present invention relates to electric and electronic technical field, more particularly to a kind of power device loss test method, system and dress
Put.
Background technology
With continuing to develop for Power Electronic Technique, power device species is continuously increased.Meeting in the power device course of work
Substantial amounts of heat is produced, accordingly it is desirable to radiator radiates to it.According to different design requirements, the loss of power device
Difference, its radiator for being also accomplished by different heat-sinking capabilities, therefore, it is necessary first to power device carries out loss test, obtains work(
Conduction loss and switching loss of rate device etc., secondly, are dissipated accordingly according to the parameter that power device loss test is obtained
Hot device design.
Existing power device loss test is emulated computation method, by actual condition and control mode determine voltage,
The parameters such as electric current, dutycycle, then select power device, the spy of power device IGBT module in fitting power device data handbook
Linearity curve, for example：Saturation voltage (Vcesat)-electric current (Ic) curve and damage curve etc. during conducting, searches according to fitting data
Voltage, loss value under respective conditions, and the loss of power device is determined by integral and calculating, for example：Conduction loss and switch
Loss etc..
However, existing power device loss test accuracy rate is not high.
The content of the invention
The invention provides a kind of power device loss test mthods, systems and devices, to solve existing power device
Loss test accuracy rate problem not high.
In a first aspect, the invention provides a kind of power device loss test method, including：
Obtain power device it is in running order when, first temperature at the corresponding water-cooling base plate two ends of above-mentioned power device
Difference, above-mentioned power device is arranged on above-mentioned water-cooling base plate；
After above-mentioned water-cooling base plate cooling, the electric current that regulation heating module passes through so that the temperature at above-mentioned water-cooling base plate two ends
Difference is above-mentioned first temperature difference, and above-mentioned heating module is arranged on above-mentioned water-cooling base plate；
According to above-mentioned electric current, the loss of above-mentioned power device is determined.
Optionally, when above-mentioned acquisition power device works, first temperature at the corresponding water-cooling base plate two ends of above-mentioned power device
Degree is poor, including：
Obtain the first temperature of the temperature-detecting device detection that above-mentioned water-cooling base plate first end is set；
Obtain the second temperature of the temperature-detecting device detection of the end of above-mentioned water-cooling base plate second setting；
According to above-mentioned second temperature and the difference of above-mentioned first temperature, above-mentioned first temperature difference is obtained.
Optionally, it is above-mentioned according to above-mentioned electric current, determine the loss of above-mentioned power device, including：
Voltage and the product of above-mentioned electric current according to above-mentioned heating module two ends, determine the loss of above-mentioned power device.
Second aspect, the invention provides a kind of power device loss test system, including：
Water pipe, the first temperature-detecting device, water-cooling base plate and second temperature detection means, wherein, above-mentioned water pipe include into
The mouth of a river and delivery port, above-mentioned water-cooling base plate be arranged on above-mentioned first temperature-detecting device and above-mentioned second temperature detection means it
Between, above-mentioned water-cooling base plate sets power device in first state on above-mentioned water-cooling base plate, above-mentioned power device is in work shape
State；Above-mentioned water-cooling base plate sets heating module, above-mentioned heating module heating power in the second state on above-mentioned water-cooling base plate.
Optionally, above-mentioned power device loss test system, also includes：
Circulating pump and heat-exchanger rig, above-mentioned circulating pump be arranged on above-mentioned second temperature detection means and above-mentioned delivery port it
Between, above-mentioned heat-exchanger rig is set between above-mentioned circulating pump and above-mentioned delivery port, above-mentioned circulating pump be used for by water drainage by
State heat-exchanger rig, above-mentioned heat-exchanger rig is used to cool down the water in above-mentioned water pipe, above-mentioned delivery port and above-mentioned water inlet list
To connection.
Optionally, above-mentioned power device loss test system, also includes：Water valve, above-mentioned water valve be arranged on it is above-mentioned enter water
Between mouth and above-mentioned first temperature-detecting device, for controlling passing through for current.
Optionally, above-mentioned power device loss test system, above-mentioned water-cooling base plate includes at least two submounts, each
One power device of above-mentioned submounts correspondence.
The third aspect, the invention provides a kind of power device loss test device, including：
Acquisition module, for obtain power device it is in running order when, the corresponding water-cooling base plate two of above-mentioned power device
First temperature difference at end, above-mentioned power device is arranged on above-mentioned water-cooling base plate；
Control module, after being cooled down for above-mentioned water-cooling base plate, the electric current that regulation heating module passes through so that above-mentioned water-cooled base
The temperature difference at plate two ends is above-mentioned first temperature difference, and above-mentioned heating module is arranged on above-mentioned water-cooling base plate；
Processing module, for according to above-mentioned electric current, determining the loss of above-mentioned power device.
Optionally, above-mentioned acquisition module is specifically for obtaining the temperature-detecting device inspection that above-mentioned water-cooling base plate first end is set
The first temperature surveyed；Obtain the second temperature of the temperature-detecting device detection of the end of above-mentioned water-cooling base plate second setting；According to above-mentioned
The difference of second temperature and above-mentioned first temperature, obtains above-mentioned first temperature difference.
Optionally, above-mentioned processing module multiplying specifically for the voltage according to above-mentioned heating module two ends and above-mentioned electric current
Product, determines the loss of above-mentioned power device.
The power device loss test mthods, systems and devices that the present invention is provided, wherein, power device loss test side
Method, including：When acquisition power device is in running order, power device is arranged on water-cooling base plate, power device is corresponding
First temperature difference at water-cooling base plate two ends；After water-cooling base plate cooling, heating module substitution power device is arranged on water-cooling base plate,
The electric current that regulation heating module passes through so that the temperature difference at water-cooling base plate two ends is the first temperature difference；According to by heating module
Electric current, determine the loss of power device.The power device loss test method that the present invention is provided is in the actual work of power device
Make to test under state, it is to avoid in existing power device loss test, the work of power device is simulated due to computer software
Situation and actual condition have a difference, and the error brought.So as to the power device loss test method that the present invention is provided is improved
The accuracy rate of power device loss test.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description does one and simply introduces, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can be with root
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of power device loss test mthods, systems and devices embodiment one of the present invention；
Fig. 2 is another schematic flow sheet of power device loss test mthods, systems and devices embodiment one of the present invention；
Fig. 3 is the structural representation of power device loss test mthods, systems and devices embodiment one of the present invention；
Fig. 4 is another structural representation of power device loss test mthods, systems and devices embodiment one of the present invention.
Description of reference numerals：
1：Tank；
2：Water valve；
3：Water pipe；
4：First temperature-detecting device；
5：Power device；
5’：Heating module；
6：Water-cooling base plate；
7：Circulating pump；
8：Heat-exchanger rig；
9：Second temperature detection means；
401：Acquisition module；
402：Control module；
403：Processing module.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Term " first ", " second ", " the 3rd " in description and claims of this specification and above-mentioned accompanying drawing and/or
(if present)s such as " the 4 " is for distinguishing similar object, without for describing specific order or precedence.Should
The data that the understanding is so used can be exchanged in the appropriate case, so as to embodiments of the invention described herein, for example can
Enough orders with addition to those for illustrating herein or describing are implemented.Additionally, term " comprising " and " having " and they
Any deformation, it is intended that covering is non-exclusive to be included, for example, containing the process of series of steps or unit, method, being
System, product or equipment are not necessarily limited to those steps or the unit clearly listed, but may include not list clearly or
For these processes, method, product or other intrinsic steps of equipment or unit.
The power device loss test method that the present invention is provided is tested under the actual working condition of power device, it is to avoid
In existing power device loss simulation process, because the working condition of computer software simulation power device has with actual condition
There is a difference, and the error brought.So as to the power device loss test method that the present invention is provided improves power device loss and surveys
The accuracy rate of examination.
Technical scheme is described in detail with specifically embodiment below.These specific implementations below
Example can be combined with each other, and may be repeated no more in some embodiments for same or analogous concept or process.
Embodiment one
Fig. 1 is the schematic flow sheet of power device loss test mthods, systems and devices embodiment one of the present invention, the present invention
The power device loss test method of offer, for carrying out loss test to power device to be tested in equipment.With reference to Fig. 1,
The power device loss test method that the present invention is provided, including：
S101：Obtain power device it is in running order when, the first of the corresponding water-cooling base plate two ends of the power device
Temperature difference, the power device is arranged on the water-cooling base plate.
Wherein, the power device 5 is in running order refers to, the equipment where assembling power device 5 except radiating
Miscellaneous part outside device, wherein, the radiator of this equipment is replaced with water-cooling base plate 6, power device 5 to be tested is positioned over
On water-cooling base plate 6, this equipment is run according to the operating mode in the actual motion of the equipment where power device 5 so that power device 5
In normal operating conditions.Now, water-cooling base plate 6 is in first state.
Optionally, the above-mentioned water-cooling base plate 6 in for power device loss test method, can be free-standing water-cooled base
Plate 6, or integral type water-cooled are basic.Different demands is carried out during in order to carrying out loss test according to different capacity device
Selection is used.
Fig. 2 is another schematic flow sheet of power device loss test mthods, systems and devices embodiment one of the present invention, ginseng
Fig. 2 is examined, optionally, the power device loss test method that the present invention is provided also includes：
S1011：Obtain the first temperature of the temperature-detecting device detection that the water-cooling base plate first end is set.
Wherein, the first end of the water-cooling base plate 6 refers to one end that cooling water flows into water-cooling base plate 6, the water-cooling base plate 6 the
The temperature-detecting device that one end is set is the first temperature-detecting device 4, and cooling water passes through the first temperature before flowing into water-cooling base plate 6
Detection means 4 measures water temperature, obtains the first temperature.
S1012：Obtain the second temperature of the temperature-detecting device detection of the end of the water-cooling base plate second setting.
Wherein, the end of the water-cooling base plate 6 second refers to the one end that cooling water flow out of water-cooling base plate 6, the water-cooling base plate 6
The temperature-detecting device that two ends are set is second temperature detection means 9, cooling water flow out of water-cooling base plate 6 afterwards by second temperature
Detection means 9 measures water temperature, obtains second temperature.
S1013：According to the second temperature and the difference of first temperature, first temperature difference is obtained.
Specifically, power device 5 gives out heat when being in normal operating conditions, the heat for giving out is by water-cooling base plate 6
In cooling water absorb so that the temperature for flowing through the cooling water in water-cooling base plate 6 changes, by after the default time, obtaining
The difference for obtaining the first temperature and second temperature is the first temperature difference.
S102：After the water-cooling base plate cooling, the electric current that regulation heating module passes through so that the water-cooling base plate two ends
Temperature difference is first temperature difference, and the heating module is arranged on the water-cooling base plate.
Wherein, refer to that the equipment where power device to be tested 5 is by above-mentioned default after the water-cooling base plate 6 is cooled down
Time after, the working condition of arrestment, by the temperature at equipment and water-cooling base plate 6 recover to start test when it is original
State.
Exemplary, the power device 5 that the test of above-mentioned power attenuation is used in equipment is removed by water-cooling base plate, water-cooled base
Temperature at plate 6 is recovered to reset condition, and heating module 5 ' is positioned over into above-mentioned water-cooling base plate 6.Now, at water-cooling base plate 6
In the second state.Electric current is provided to above-mentioned heating module 5 ' so that heating module 5 ' generates heat.Current value, magnitude of voltage are measured simultaneously
And the temperature value at the measurement of the first temperature-detecting device 4 water temperature, second temperature detection means 9, when above-mentioned two temperature measuring equipment is surveyed
Temperature approach it is equal with the first temperature difference when, stop recording and is stopped above by the current value and magnitude of voltage of heating module 5 '
The only operation of equipment.
S103：According to the electric current, the loss of the power device is determined.
Specifically, according to the above-mentioned magnitude of voltage by the current value of heating module 5 ' and the two ends of heating module 5 ' for measuring
Product, calculates the loss of heating module 5 ', because heating module 5 ' is in external environment identical feelings with the power device 5 of test
Heated up under condition, and elevated temperature value is identical, so, loss and then acquisition power device by heating module 5 '
5 loss.
Specifically, in S101 the normal work of power device 5 temperature rise process, with the heating power of heating module 5 ' in S102
Temperature rise process, test equipment environment and external environment all same during two, and then, can eliminate due to water-cooling base plate certainly
The error that the change such as body or external environment brings, reaches the purpose to the accurate test of power device loss.
Fig. 3 is the structural representation of power device loss test mthods, systems and devices embodiment one of the present invention, the present invention
The power device loss test system of offer, power device test system is used to damage power device to be tested in equipment
Consumption test.With reference to the power device loss test system that Fig. 3, the present invention are provided, including：
Water pipe 3, the first temperature-detecting device 4, water-cooling base plate 6 and second temperature detection means 9.
Wherein, specifically, water pipe 3 includes water inlet, after cooling water enters oral siphon 3 by the water inlet of water pipe 3, it flow to water-cooled
The first end of substrate 6, and water-cooling base plate 6 is entered by the first end of water-cooling base plate 6.In water inlet to the first end of water-cooling base plate 6
On water pipe 3.The first temperature-detecting device 4 is provided with, is cooled down for measuring to be flow to during the first end of water-cooling base plate 6 by water inlet
The temperature of water.
Specifically, water pipe 3 is included into delivery port, the cooling water of water-cooling base plate 6 is flowed through, flow to by the end of water-cooling base plate 6 second
The delivery port of water pipe 3.On the water pipe 3 at the end of water-cooling base plate 6 second to delivery port.Second temperature detection means 9 is provided with, is used for
Measurement is flow to the temperature of cooling water during delivery port by the end of water-cooling base plate 6 second.
Specifically, water-cooling base plate 6 is arranged between the first temperature-detecting device 4 and second temperature detection means 9, water-cooled base
Plate 6 sets power device 5 in first state on water-cooling base plate 6, power device 5 is in running order；Water-cooling base plate 6 is
During two-state, heating module 5 ', the heating power of heating module 5 ' are set on water-cooling base plate 6.
Exemplary, first, miscellaneous part of the equipment at the place of power device 5 in addition to radiator is assembled, use water-cooled
Substrate 6 replaces the radiator of this equipment.Wherein, above-mentioned water-cooling base plate 6 refers in first state, by power device 5 to be tested
It is positioned on water-cooling base plate 6, runs this equipment according to the operating mode in the actual motion of the equipment where power device 5 so that work(
Rate device 5 is in normal operating conditions.When water-cooling base plate 6 is in first state, the in running order lower generation heat of power device 5
Amount, the cooling water for flowing through water-cooling base plate 6 is used for the in running order heat for distributing of absorbed power device 5.So as to flow through water-cooled
The temperature value of the cooling water of substrate 6 can be raised, and the temperature value that above-mentioned first temperature-detecting device 4 is measured is the first temperature value, on
It is second temperature value to state the temperature value that second temperature detection means 9 measures.The difference of the first temperature value and second temperature value is the
One temperature difference.
Secondly, the equipment where power device to be tested 5 is by after the above-mentioned default time, the work shape of arrestment
State, the power device 5 that the test of above-mentioned power attenuation is used in equipment is removed by water-cooling base plate, and the temperature at water-cooling base plate 6 is extensive
Answer to reset condition, heating module 5 ' is positioned over above-mentioned water-cooling base plate 6.Electric current is provided to above-mentioned heating module 5 ' so that
Heating module 5 ' generates heat.Current value, magnitude of voltage and the first temperature-detecting device 4 measurement water temperature, second temperature inspection are measured simultaneously
The temperature value surveyed at device 9, when the temperature approach that above-mentioned two temperature measuring equipment is measured is equal with the first temperature difference, stop recording is above-mentioned
By the current value and magnitude of voltage of heating module 5 ', and during the operation of arrestment, heating module 5 ' is set on water-cooling base plate 6,
The heating power of heating module 5 '.
Finally, multiplying according to the above-mentioned magnitude of voltage by the current value of heating module 5 ' and the two ends of heating module 5 ' for measuring
Product, calculates the loss value of heating module 5 ', because heating module 5 ' is in external environment identical feelings with the power device 5 of test
Heated up under condition, and elevated temperature value is identical, so, loss and then acquisition power device by heating module 5 '
5 loss.
Specifically, the temperature rise process of the normal work of power device 5, the temperature rise process of the heating power of heating module 5 ', two mistakes
Test equipment environment and external environment all same in journey, and then, can eliminate due to water-cooling base plate itself or extraneous ring
The error that the change such as border brings, reaches the purpose to the accurate test of power device loss.
With reference to Fig. 3, optionally, the power device loss test system that the present invention is provided also includes：
Circulating pump 7 and heat-exchanger rig 8.
Specifically, circulating pump 7 is arranged between the delivery port of second temperature detection means 9 and water pipe 3, circulating pump 7 is used for
By water drainage by each device in the loss test system of power device 5.More specifically, it is that cooling water flows through water-cooling base plate
6 and the grade of heat-exchanger rig 8 provide power.
Circulating pump 7 is additionally operable to control the flow velocity of cooling water in the loss test system of power device 5, by above-mentioned water-cooling base plate 6
The flow velocity of cooling water is all a certain preset value under first state and the second state so that the first state of water-cooling base plate 6 and the second shape
The test condition of the loss test of power device 5 is consistent under state, is conducive to the accuracy of the loss test result of power device 5.
Optionally, the preset value of the flow velocity of cooling water is according to actual needs during the loss test of power device 5, in system
Set, be not restricted in the present invention.
Specifically, heat-exchanger rig 8 is set between the delivery port of circulating pump 7 and water pipe 3, heat-exchanger rig 8 is used for water pipe 3
In water cooled down.More specifically, under the first state of water-cooling base plate 6, the heat that the normal work of power device 5 is produced makes
The cooling water temperature that water-cooling base plate 6 must be flowed through is raised, or, under the state of water-cooling base plate 6 second, heating module 5 ' was heating up
In journey produce heat pass through water-cooling base plate 6 cooling water temperature raise, heat-exchanger rig 8 to said temperature raise after it is cold
But water is lowered the temperature so that cooling water can enter test system by the water inlet of water pipe 3 again, improve the utilization rate of cooling water.
Optionally, the water inlet unilaterally connected of the delivery port of water pipe 3 and water pipe 3, as a kind of enforceable mode, can be with
One-way flow valve is set with the water inlet of water pipe 3 in the delivery port of water pipe 3.
Optionally, water-cooling base plate 6 includes at least two submounts, each submounts one power device of correspondence.
Optionally, the loss test system of above-mentioned power device 5 is current closed system, used as another enforceable side
Formula, can set two tanks 1, be connected with the water inlet of water pipe 3 and the delivery port of water pipe 3 respectively, and this kind of current are open
In the loss test system of power device 5, the above-mentioned heat-exchanger rig 8 of setting can be saved, can reached and the closed power device of current
The loss test system identical of part 5 tests effect.
With reference to Fig. 3, optionally, the power device loss test system that the present invention is provided also includes：
Water valve 2, water valve 2 is arranged between the water inlet of water pipe 3 and the first temperature-detecting device 4, for controlling current
Pass through.
Optionally, water-cooling base plate 6 includes at least two submounts, each one power device 5 of the submounts correspondence.
Specifically, the above-mentioned water-cooling base plate 6 in for power device loss test method, can be free-standing water-cooled base
Plate 6, or integral type water-cooled are basic.Different demands is carried out during in order to carrying out loss test according to different capacity device
Selection is used.
Fig. 4 is another structural representation of power device loss test mthods, systems and devices embodiment one of the present invention, this
The power device loss test device for providing is invented, power device test device is used to enter power device to be tested in equipment
Row loss test, it is corresponding with power device loss test method.With reference to the power device loss test that Fig. 4, the present invention are provided
Device, including：
Acquisition module 401, control module 402 and processing module 403.
Wherein, acquisition module 401, for obtain power device 5 it is in running order when, the corresponding water-cooled of power device 5
First temperature difference at the two ends of substrate 6, power device 5 is arranged on water-cooling base plate 6.
Control module 402, after being cooled down for water-cooling base plate 6, the electric current that regulation heating module 5 ' passes through so that water-cooling base plate
The temperature difference at 6 two ends is the first temperature difference, and heating module 5 ' is arranged on water-cooling base plate 6.
Processing module 403, for according to electric current, determining the loss of power device 5.
Optionally, acquisition module 401 is specifically for obtaining the temperature-detecting device inspection that the first end of water-cooling base plate 6 is set
The first temperature surveyed；Obtain the second temperature of the temperature-detecting device detection of the end of the water-cooling base plate 6 second setting；According to described
The difference of second temperature and first temperature, obtains first temperature difference.
Optionally, the multiplying specifically for the voltage according to the two ends of heating module 5 ' and the electric current of processing module 403
Product, determines the loss of the power device 5.
The present embodiment provide power device loss test mthods, systems and devices, there is provided power device loss test
Method is tested under the actual working condition of power device, it is to avoid in existing power device loss emulation, due to computer
The working condition of software simulated power device and actual condition have a difference, and the error brought.So as to the work(that the present invention is provided
Rate device loss method of testing improves the accuracy rate of power device loss test.The power device provided by the present invention is lost
The power device lossy data that method of testing, system and device are obtained, for being tested setting for the corresponding radiator of power device
Meter, it is to avoid fansink designs size is bigger than normal, causes heatsink weight and cost to increase, and does not meet current power product small-sized
Change, light-weighted requirement, or fansink designs size are less than normal, and radiator cannot meet radiating requirements, and re-start design meeting
Extension product development cycle and wasting problem.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of power device loss test method, it is characterised in that including：
Obtain power device it is in running order when, first temperature difference at the corresponding water-cooling base plate two ends of the power device, institute
Power device is stated to be arranged on the water-cooling base plate；
After water-cooling base plate cooling, the electric current that regulation heating module passes through so that the temperature difference at the water-cooling base plate two ends is
First temperature difference, the heating module is arranged on the water-cooling base plate；
According to the electric current, the loss of the power device is determined.
2. method according to claim 1, it is characterised in that when the acquisition power device works, the power device
First temperature difference at corresponding water-cooling base plate two ends, including：
Obtain the first temperature of the temperature-detecting device detection that the water-cooling base plate first end is set；
Obtain the second temperature of the temperature-detecting device detection of the end of the water-cooling base plate second setting；
According to the second temperature and the difference of first temperature, first temperature difference is obtained.
3. method according to claim 2, it is characterised in that described according to the electric current, determines the power device
Loss, including：
Voltage and the product of the electric current according to the heating module two ends, determine the loss of the power device.
4. a kind of power device loss test system, it is characterised in that including：Water pipe, the first temperature-detecting device, water-cooling base plate
With second temperature detection means, wherein, the water pipe includes water inlet and delivery port, and the water-cooling base plate is arranged on described first
Between temperature-detecting device and the second temperature detection means, the water-cooling base plate in first state, the water-cooling base plate
Upper setting power device, the power device is in running order；The water-cooling base plate in the second state, the water-cooling base plate
Upper setting heating module, the heating module heating power.
5. power device loss test system according to claim 4, it is characterised in that also include：
Circulating pump and heat-exchanger rig, the circulating pump are arranged between the second temperature detection means and the delivery port, institute
State heat-exchanger rig to be set between the circulating pump and the delivery port, the circulating pump is used for water drainage by the heat exchange
Device, the heat-exchanger rig is used to cool down the water in the water pipe, the delivery port and the water inlet unilaterally connected.
6. power device loss test system according to claim 5, it is characterised in that also include：Water valve, the water valve
It is arranged between the water inlet and first temperature-detecting device, for controlling passing through for current.
7. the power device loss test system according to claim any one of 4-6, it is characterised in that the water-cooling base plate
Comprising at least two submounts, each one power device of the submounts correspondence.
8. a kind of power device loss test device, it is characterised in that including：
Acquisition module, for obtain power device it is in running order when, the corresponding water-cooling base plate two ends of the power device
First temperature difference, the power device is arranged on the water-cooling base plate；
Control module, after being cooled down for the water-cooling base plate, the electric current that regulation heating module passes through so that the water-cooling base plate two
The temperature difference at end is first temperature difference, and the heating module is arranged on the water-cooling base plate；
Processing module, for according to the electric current, determining the loss of the power device.
9. device according to claim 8, it is characterised in that the acquisition module is specifically for obtaining the water-cooling base plate
First temperature of the temperature-detecting device detection that first end is set；Obtain the temperature detection dress of the end of the water-cooling base plate second setting
Put the second temperature of detection；According to the second temperature and the difference of first temperature, first temperature difference is obtained.
10. device according to claim 9, it is characterised in that the processing module is specifically for according to the heating mould
The voltage at block two ends and the product of the electric current, determine the loss of the power device.
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