CN208060663U - Power module loop test circuit and test equipment - Google Patents
Power module loop test circuit and test equipment Download PDFInfo
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- CN208060663U CN208060663U CN201820603238.7U CN201820603238U CN208060663U CN 208060663 U CN208060663 U CN 208060663U CN 201820603238 U CN201820603238 U CN 201820603238U CN 208060663 U CN208060663 U CN 208060663U
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Abstract
The utility model discloses a kind of power module loop test circuit and power module test equipment, the wherein power module loop test circuit, power module includes upper bridge arm power tube and lower bridge arm power tube, and power module loop test circuit includes test power supply, voltage collecting device and controller；The first output end and second output terminal of test power supply are parallel to the both ends of the busbar of power module to be tested, the output end of each power tube is separately connected in the sampling end and power module of voltage collecting device, and voltage collecting device is also separately connected with the first output end of test power supply and second output terminal；Voltage collecting device controlled end is also connect with the control terminal of controller；The control terminal of controller is also connect with the controlled end of power module；The voltage at upper bridge arm both ends and lower bridge arm both ends during voltage collecting device collecting test, controller receiving voltage is to test power module.Technical solutions of the utility model simplify circuit structure, reduce cost.
Description
Technical field
The utility model is related to power module test technical field, more particularly to a kind of power module loop test circuit and
Test equipment.
Background technology
With further expanding of applying of power electronic devices in industrial circle, resistance to high current, high pressure resistant, high speed and low full
It is increasingly extensive with the application of the IGBT device of pressure drop.But while increasing along with power consumption, the excessively high problem of junction temperature is also brought,
More stringent requirements are proposed for this reliability to IGBT device, also implies that the heat dissipation design to IGBT device, heat dissipation performance carry
Further requirement is gone out.In order to meet the requirement of IGBT product long lifetimes, can be tested by power cycle this reliable
Property test, the quality level of IGBT products is detected.
In power cycle experiment, tested IGBT device power supply is simulated in the environment of application and is turned on and off, due to quilt
Non-uniform Temperature Distribution will be generated by surveying IGBT device encapsulation inside, and the coefficient of thermal expansion encapsulated between internal different materials is different
Thermal-mechanical stress is will produce, and material can be caused to degrade with relevant deterioration of generating heat, to cause the mistake of tested IGBT device
Effect.Pass through the measurement, reading and analysis to electrical parameter in experiment, it can be estimated that tested IGBT device encapsulation is internal with power
Circulation experiment carries out and the demotion processes of generation, and is detected to the package level for being tested IGBT device.Common test is pair
The power circulation test of single IGBT device is to pass to constant current in device collector and transmitting interpolar, when IGBT is opened,
Junction temperature rises to certain temperature, turns off IGBT at this time, after waiting for junction temperature to decline, opens IGBT again, and cycle is certain repeatedly
Number investigates the performance change of IGBT, but there are six IGBT, existing power module test to set for intelligent power module generally encapsulation
Standby is individually to investigate its performance to this six IGBT independent measurements, causes its test circuit complicated.
Utility model content
The main purpose of the utility model is to provide a kind of power module loop test circuit, it is intended to simplify circuit.
To achieve the above object, the utility model proposes power module loop test circuit, the power module includes
Upper bridge arm power tube and lower bridge arm power tube, the power module loop test circuit include test power supply, voltage collecting device
And controller；
The first output end and second output terminal of the test power supply are parallel to the two of the busbar of power module to be tested
End, the sampling end of the voltage collecting device and the output end of each power tube in the power module are separately connected；Institute
The controlled end for stating voltage collecting device is also connect with the control terminal of the controller；The driving end of the controller and the power
The controlled end of module connects；
The voltage collecting device is for upper bridge arm power tube grid source both ends and lower bridge arm power tube during collecting test
The voltage at grid source both ends, the controller receive the voltage to test power module.
Preferably, the controller include bridge arm driving end in the first phase, bridge arm driving end in the second phase, bridge on third phase
Arm drives end, the first phase lower bridge arm driving end, the second phase lower bridge arm driving end and third phase lower bridge arm to drive end；The power
Module includes bridge arm controlled end in the first phase, bridge arm controlled end in the second phase, bridge arm controlled end, the first phase lower bridge arm on third phase
Controlled end, the second phase lower bridge arm controlled end and third phase lower bridge arm controlled end；
Bridge arm driving end is connect with bridge arm controlled end in the first phase of the power module in first phase of the controller,
Bridge arm driving end is connect with bridge arm controlled end in the second phase of the power module in second phase of the controller, the controller
Third phase on bridge arm driving end connect with bridge arm controlled end on the third phase of the power module, the first phase of the controller
Lower bridge arm driving end is connect with the first phase lower bridge arm controlled end of the power module, and the second phase lower bridge arm of the controller is driven
Moved end is connect with the second phase lower bridge arm controlled end of the power module, the third phase lower bridge arm driving end of the controller and institute
State the third phase lower bridge arm controlled end of power module.
Preferably, the power module further includes upper bridge driving chip, and bridge arm power tube includes on first on the three-phase
Bridge arm power tube, bridge arm power tube in bridge arm power tube and third on second；Wherein
First driving end of the upper bridge driving chip is connect with the grid of bridge arm power tube on described first, the upper bridge
Second driving end of driving chip is connect with the grid of bridge arm power tube on described second, and the third of the upper bridge driving chip is driven
Moved end is connect with the grid of bridge arm power tube in the third；The upper bridge driving chip is also connect with the controller；
The drain electrode of bridge arm power tube on described first, bridge arm power tube in the drain electrode of bridge arm power tube and third on second
Drain electrode is connected with each other；The source electrode and drain electrode of bridge arm power tube and the sampling end of the voltage collecting device connect respectively on described first
Connect, on described second in the source electrode of bridge arm power tube and third the source electrode and the voltage collecting device of bridge arm power tube sampling
End is separately connected.
Preferably, the power module further includes lower bridge driving chip, and the three-phase lower bridge arm power tube includes under first
Bridge arm power tube, the second lower bridge arm power tube and third lower bridge arm power tube；
First driving end of the lower bridge driving chip is connect with the grid of the first lower bridge arm power tube, the lower bridge
Second driving end of driving chip is connect with the grid of the second lower bridge arm power tube, and the third of the lower bridge driving chip is driven
Moved end is connect with the grid of the third lower bridge arm power tube；The lower bridge driving chip is also connect with the controller；
The drain electrode of the first lower bridge arm power tube is connect with the drain electrode of bridge arm power tube on described first, under described second
The drain electrode of bridge arm power tube connect with the drain electrode of bridge arm power tube on described second, the third lower bridge arm power tube drain and with institute
State the drain electrode connection of bridge arm power tube in third；
The source electrode of bridge arm power tube on described first, bridge arm power in the source electrode of bridge arm power tube and third on described second
The source electrode of pipe and the sampling end of the sampling end and the voltage collecting device of the voltage collecting device are separately connected.
Preferably, including the voltage collecting device includes the first intelligent voltage table and the second intelligent voltage table；Described
First sampling end of one intelligent voltage table is connect with the drain electrode of bridge arm power tube on described first, the first intelligent voltage table
The source electrode of bridge arm power tube on second sampling end and described first, bridge arm power in the source electrode of bridge arm power tube and third on second
The source electrode of pipe is separately connected；
First sampling end of the second intelligent voltage table is connect with the second sampling end of the first intelligent voltage table, institute
State the second sampling end of the second intelligent voltage table and the source electrode of the first lower bridge arm power tube, the second lower bridge arm power tube
Source electrode and the third lower bridge arm power tube source electrode are separately connected.
Preferably, the test power supply is DC power supply, bridge arm work(on the anode and described first of the test power supply
The drain electrode of rate pipe connects, and the cathode of the test power supply is connect with the third lower bridge arm power tube source electrode.
Preferably, the power module loop test circuit further includes host computer, and the host computer connects with the controller
It connects.
Preferably, the host computer is computer.
To achieve the above object, the utility model also proposes a kind of power module test equipment, the power module test
Equipment includes power module loop test circuit as described above.The power module loop test circuit, the power module packet
Bridge arm power tube and lower bridge arm power tube are included, the power module loop test circuit includes test power supply, voltage acquisition dress
It sets and controller；The first output end and second output terminal of the test power supply are parallel to the busbar of power module to be tested
Both ends, the sampling end of the voltage collecting device and the output end of each power tube in the power module are separately connected,
The voltage collecting device is also separately connected with the first output end of the test power supply and second output terminal；The voltage acquisition
Device controlled end is also connect with the control terminal of the controller；The driving end of the controller is controlled with the power module
End connection；The voltage at upper bridge arm both ends and lower bridge arm both ends, the controller during the voltage collecting device collecting test
The voltage is received to test power module.
Power module test circuit test power supply, voltage collecting device and controller in technical solutions of the utility model.
The first output end and second output terminal of the test power supply are parallel to the both ends of the busbar of power module to be tested, the institute
The output end for stating the sampling end and each power tube in the power module of voltage collecting device is separately connected, the voltage acquisition
Device is also separately connected with the first output end of the test power supply and second output terminal；The voltage collecting device controlled end
Also it is connect with the control terminal of the controller；The control terminal of the controller is also connect with the controlled end of the power module.It is logical
Overvoltage harvester is detected the upper bridge arm voltage and lower bridge arm voltage of power module to be tested, then by the electricity of detection
Pressure is sent to controller and is handled, and realizes a kind of power module test circuit.Technical solutions of the utility model have structure
Simply, lower-cost advantage.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the functional block diagram of one embodiment of the utility model power module loop test circuit；
Fig. 2 is the electrical block diagram of one embodiment of the utility model power module loop test circuit.
Drawing reference numeral explanation：
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in the utility model embodiment
It is only used for explaining relative position relation, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, such as
When the fruit particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and cannot understand
To indicate or implying its relative importance or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " first ",
The feature of " second " can explicitly or implicitly include at least one of the features.In addition, the technical side between each embodiment
Case can be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, when the combination of technical solution
Occur it is conflicting or when cannot achieve should people think that the combination of this technical solution is not present, also do not wanted in the utility model
Within the protection domain asked.
The utility model proposes a kind of power module loop test circuits.
Referring to Fig.1, in the utility model embodiment, the power module loop test circuit, the power module 100 wraps
Bridge arm power tube and lower bridge arm power tube are included, the power module loop test circuit includes test power supply 300, voltage acquisition
Device 200 and controller 100.Further, the power module loop test circuit further includes host computer 400, described upper
Machine 400 is connect with the controller 100.Computer realization can be used in host computer 400.
In the present embodiment, test power supply 300 uses DC power supply, for providing the electricity needed for test for power module 100
Pressure.Include 6 IGBT power tubes in power module 100 to be tested.Wherein, upper bridge arm power tube includes that there are three 3
IGBT power tubes, lower bridge arm power tube include 3 IGBT power tubes.Controller 100 can be chips and the phases such as microcontroller, DSP
The peripheral circuit answered is constituted.
In the present embodiment, the topological structure of power module loop test circuit is：First output of the test power supply 300
End and second output terminal are parallel to the both ends of the busbar of power module 100 to be tested, the voltage collecting device 200
The output end of sampling end and each power tube in the power module 100 is separately connected, the voltage collecting device 200 also with institute
The first output end and second output terminal for stating test power supply 300 are separately connected；200 controlled end of the voltage collecting device also with
The control terminal of the controller 100 connects；The driving end of the controller 100 is connect with the controlled end of the power module 100.
Voltage of the voltage collecting device 200 for upper bridge arm both ends and lower bridge arm both ends during collecting test, institute
It states controller 100 and receives the voltage to test power module 100.It should be noted that during the test, upper bridge
3 IGBT parallel connections of arm are an entirety, and 3 IGBT parallel connections of lower bridge arm are an entirety, Shang Qiao and the series connection of lower bridge.It, will when test
IGBT point is 3 groups, and each group includes 2 IGBT, and each group of two IGBT are not in same phase.
In a test method, 2 IGBT in 1 group are opened, while applying predetermined current by testing power supply 300, it is real
The voltage of Shi Jilu upper bridge arm and lower bridge arm turns off this 2 IGBT after being kept for a period of time, is generated and is corresponded to by the voltage of acquisition
The variations injunction temperature curve of IGBT judges whether IGBT works normally according to variations injunction temperature curve, if IGBT is normal, continues open-minded
Another set, until thering is IGBT to damage position；If IGBT is damaged, test terminates.
In another test method, in a certain order, one group of IGBT is opened successively, applied by testing power supply 300
Predetermined current, the voltage of record upper bridge arm and lower bridge arm, this 2 IGBT are turned off after being kept for a period of time in real time.Cycle is surveyed
Examination sets cycle-index, when loop test reaches, terminates test.
It should be noted that corresponding test software is equipped in host computer 400, to control test process according to preset
Step carries out.The junction temperature curve of generation, the in real time parameters such as upper bridge arm and the voltage of lower bridge arm or curvilinear figure are depicted in upper
In machine 400, tester can issue test instruction by host computer 400, observe test result.
100 test circuit of power module test power supply 300, voltage collecting device 200 in technical solutions of the utility model
And controller 100.The first output end and second output terminal of the test power supply 300 are parallel to power module 100 to be tested
Busbar both ends, the output end of each power tube in the sampling end of the voltage collecting device 200 and the power module 100
It is separately connected, the voltage collecting device 200 also connects with the first output end of the test power supply 300 and second output terminal respectively
It connects；200 controlled end of the voltage collecting device is also connect with the control terminal of the controller 100；The control of the controller 100
End processed is also connect with the controlled end of the power module 100.By voltage collecting device 200 to power module 100 to be tested
Upper bridge arm voltage and lower bridge arm voltage be detected, then the voltage of detection is sent to controller 100 and is handled, realized
A kind of 100 test circuit of power module.Technical solutions of the utility model have simple in structure, lower-cost advantage.
Specifically, the controller 100 includes bridge arm driving end (not indicating) in the first phase, bridge arm drives end in the second phase
Bridge arm driving end (not indicating), the first phase lower bridge arm driving end (not indicating), the second phase lower bridge arm control on (not indicating), third phase
Make (not indicating) and third phase lower bridge arm driving end (not indicating)；The power module 100 includes bridge arm controlled end in the first phase
Bridge arm controlled end IN (VH) on IN (UH), the second phase, bridge arm controlled end IN (WH), the first phase lower bridge arm controlled end IN on third phase
(UL), the second phase lower bridge arm controlled end IN (VL) and third phase lower bridge arm controlled end IN (WL).
Bridge arm driving end and bridge arm controlled end IN in the first phase of the power module in first phase of the controller
(UH) it connects, bridge arm driving end and bridge arm controlled end IN (VH) in the second phase of the power module in the second phase of the controller
It connects, bridge arm driving end connects with bridge arm controlled end IN (WH) on the third phase of the power module on the third phase of the controller
It connects, the first phase lower bridge arm driving end of the controller and the first phase lower bridge arm controlled end IN (UL) of the power module connect
It connects, the second phase lower bridge arm driving end of the controller and the second phase lower bridge arm controlled end IN (VL) of the power module connect
It connects, the third phase lower bridge arm driving end of the controller and the third phase lower bridge arm controlled end IN (WL) of the power module connect
It connects.
With reference to Fig. 2, controller 100 drives end to three-phase lower bridge arm to drive end totally 6 driving ends by bridge arm in the first phase
IGBT drive signals are exported, turn-on sequence when 6 IGBT of driving are according to actual condition works.
Specifically, the power module 100 further includes upper bridge driving chip IC-HS, bridge arm power tube packet on the three-phase
Include on first on bridge arm power tube 101, second bridge arm power tube 105 on bridge arm power tube 103 and third；The upper bridge drives core
The first driving end of piece IC-HS is connect with the grid of bridge arm power tube 101 on described first, the upper bridge driving chip IC-HS
The second driving end connect with the grid of bridge arm power tube 103 on described second, the drive of the third of the upper bridge driving chip IC-HS
Moved end is connect with the grid of bridge arm power tube 105 in the third.
The upper bridge driving chip IC-HS is also connect with the controller 100, to receive the driving from controller 100
Signal.The drain electrode of bridge arm power tube 101 on described first, bridge arm power in the drain electrode of bridge arm power tube 103 and third on second
The drain electrode of pipe 105 is connected with each other；The source electrode and drain electrode of bridge arm power tube 101 and the voltage collecting device 200 on described first
Sampling end be separately connected, the source electrode of bridge arm power tube 105 and institute in the source electrode of bridge arm power tube 103 and third on described second
The sampling end for stating voltage collecting device 200 is separately connected.
The power module 100 further includes lower bridge driving chip IC-LS, and the three-phase lower bridge arm power tube includes under first
Bridge arm power tube 102, the second lower bridge arm power tube 104 and third lower bridge arm power tube 106.The lower bridge driving chip IC-LS
First driving end connect with the grid of the first lower bridge arm power tube 102, the lower bridge driving chip IC-LS second drive
Moved end is connect with 104 grids of the second lower bridge arm power tube, the third driving end of the lower bridge driving chip IC-LS and institute
The grid connection of third lower bridge arm power tube 106 is stated, the lower bridge driving chip IC-LS is also connect with the controller 100, with
Receive the drive signal from controller 100.
The drain electrode of the first lower bridge arm power tube 102 is connect with the drain electrode of bridge arm power tube 101 on described first, described
The drain electrode of second lower bridge arm power tube 104 is connect with the drain electrode of bridge arm power tube 103 on described second, the third lower bridge arm power
The drain electrode of pipe 106 is connect with the drain electrode of bridge arm power tube 105 in the third.
The source electrode of bridge arm power tube 101 on described first, bridge in the source electrode of bridge arm power tube 103 and third on described second
The source electrode of arm power tube 105 and the sampling end of the voltage collecting device 200 are separately connected.
Specifically, including the voltage collecting device 200 includes the first intelligent voltage table 210 and the second intelligent voltage table
220；First sampling end of the first intelligent voltage table 210 is connect with the drain electrode of bridge arm power tube 101 on described first, described
The source electrode of bridge arm power tube 101 on second sampling end of the first intelligent voltage table 210 and described first, bridge arm power tube on second
The source electrode of bridge arm power tube 105 is separately connected on 103 source electrode and third.First sampling of the second intelligent voltage table 220
End connect with the second sampling end of the first intelligent voltage table 210, the second sampling end of the second intelligent voltage table 220 and
The source electrode of the first lower bridge arm power tube 102,104 source electrode of the second lower bridge arm power tube and the third lower bridge arm power
106 source electrode of pipe is separately connected.
It can be readily appreciated that the first intelligent voltage table 210 is used to be acquired the voltage of upper bridge arm, the second intelligent voltage
Table 220 is for being acquired the voltage of lower bridge arm.First intelligent voltage table 210 and the second intelligent voltage table 220 can be with controls
Device 100 processed is communicated, and the voltage data of acquisition, which is transmitted to controller 100, to be handled.
Further, the test power supply 300 is DC power supply, the anode and described first of the test power supply 300
The drain electrode of upper bridge arm power tube 101 connects, the cathode and 106 source electrode of third lower bridge arm power tube of the test power supply 300
Connection.
In conjunction with Fig. 2, technical solutions of the utility model are further elaborated：
In one embodiment, 6 IGBT are respectively by IN (UH), IN (VH), IN (WH), IN (UL), IN (VL), IN
(WL) port controlling, this 6 ports are connected to controller 100, and are uniformly controlled by computer (103).The 3 IGBT parallel connections of upper bridge are
One entirety, the 3 IGBT parallel connections of lower bridge are an entirety, Shang Qiao and the series connection of lower bridge.
Testing process includes the following steps：
5V voltages are exported to IN (UH) and the port IN (VL) by computer command controller 100.
Shang Qiao and lower bridge are opened not with two IGBT all the way, such as UH and VL IGBT is open-minded, current source output one
The electric current of a 15A flows through IGBT, and the temperature of IGBT is made to increase.The combination of two IGBT opened simultaneously includes in following combination
It is a kind of：UH+VL,UH+WL,VH+UL,VH+WL,WH+UL,WH+VL.
After 10 seconds, the temperature of IGBT is to of about 125 DEG C, and current source is changed to the electric current of output 1mA at this time, IGBT's
Junction temperature slowly declines, and 25 DEG C are returned to after about 20 seconds.
Voltage collecting device 200 records the voltage change in temperature-fall period, and the change of junction temperature is extrapolated by the k-factor of device
Change curve.If proper device operation, variations injunction temperature curve is consistent when can be with calibration, otherwise illustrates device failure.
Then, start to test another IGBT combinations, such as UH+WL IGBT, until all combined tests are complete, then
It recycles again.Until there is IGBT failures, the testing time i.e. power circulation test of the intelligent power module 100 at this time
Service life.
The utility model also proposes a kind of power module test equipment, which includes that power module follows
Ring test circuit, the concrete structure of the power module loop test circuit is with reference to above-described embodiment, due to this power module test
Equipment uses whole technical solutions of above-mentioned all embodiments, therefore at least the technical solution with above-described embodiment is brought
All advantageous effects, this is no longer going to repeat them.
The above is only the preferred embodiment of the present invention, and it does not limit the scope of the patent of the present invention,
It is every under the inventive concept of the utility model, equivalent structure made based on the specification and figures of the utility model becomes
It changes, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (9)
1. a kind of power module loop test circuit, the power module includes upper bridge arm power tube and lower bridge arm power tube,
It is characterized in that, the power module loop test circuit includes test power supply, voltage collecting device and controller；
The first output end and second output terminal of the test power supply are parallel to the both ends of the busbar of power module to be tested, institute
The output end for stating the sampling end and each power tube in the power module of voltage collecting device is separately connected；The voltage acquisition
The controlled end of device is also connect with the control terminal of the controller；The driving end of the controller is controlled with the power module
End connection；
The voltage collecting device is for upper bridge arm power tube grid source both ends and lower bridge arm power tube grid source during collecting test
The voltage at both ends, the controller receive the voltage to test power module.
2. power module loop test circuit as described in claim 1, which is characterized in that the controller includes in the first phase
Bridge arm drives end, bridge arm driving end in the second phase, on third phase under bridge arm driving end, the first phase lower bridge arm driving end, the second phase
Bridge arm drives end and third phase lower bridge arm to drive end；The power module includes bridge arm controlled end in the first phase, bridge in the second phase
Bridge under bridge arm controlled end, the first phase lower bridge arm controlled end, the second phase lower bridge arm controlled end and third phase on arm controlled end, third phase
Arm controlled end；
Bridge arm driving end is connect with bridge arm controlled end in the first phase of the power module in first phase of the controller, described
Bridge arm driving end is connect with bridge arm controlled end in the second phase of the power module in second phase of controller, and the of the controller
Bridge arm driving end is connect with bridge arm controlled end on the third phase of the power module on three-phase, bridge under the first phase of the controller
Arm driving end is connect with the first phase lower bridge arm controlled end of the power module, and the second phase lower bridge arm of the controller drives end
It is connect with the second phase lower bridge arm controlled end of the power module, third phase lower bridge arm driving end and the work(of the controller
The third phase lower bridge arm controlled end of rate module.
3. power module loop test circuit as claimed in claim 2, which is characterized in that the power module further includes upper bridge
Driving chip, on the three-phase bridge arm power tube include bridge arm power tube on first, bridge in bridge arm power tube and third on second
Arm power tube；Wherein
First driving end of the upper bridge driving chip is connect with the grid of bridge arm power tube on described first, the upper bridge driving
Second driving end of chip is connect with the grid of bridge arm power tube on described second, and the third of the upper bridge driving chip drives end
It is connect with the grid of bridge arm power tube in the third；The upper bridge driving chip is also connect with the controller；
The drain electrode of bridge arm power tube on described first, on second in the drain electrode of bridge arm power tube and third bridge arm power tube drain electrode
It is connected with each other；The source electrode and drain electrode of bridge arm power tube and the sampling end of the voltage collecting device are separately connected on described first,
On described second in the source electrode of bridge arm power tube and third the source electrode and the voltage collecting device of bridge arm power tube sampling end
It is separately connected.
4. power module loop test circuit as claimed in claim 3, which is characterized in that the power module further includes lower bridge
Driving chip, the three-phase lower bridge arm power tube include bridge under the first lower bridge arm power tube, the second lower bridge arm power tube and third
Arm power tube；
First driving end of the lower bridge driving chip is connect with the grid of the first lower bridge arm power tube, the lower bridge driving
Second driving end of chip is connect with the grid of the second lower bridge arm power tube, and the third of the lower bridge driving chip drives end
It is connect with the grid of the third lower bridge arm power tube, the lower bridge driving chip is also connect with the controller；
The drain electrode of the first lower bridge arm power tube is connect with the drain electrode of bridge arm power tube on described first, second lower bridge arm
Power tube drain electrode is connect with the drain electrode of bridge arm power tube on described second, the third lower bridge arm power tube drain electrode and the third
The drain electrode of upper bridge arm power tube connects；
The source electrode of bridge arm power tube on described first, bridge arm power tube in the source electrode of bridge arm power tube and third on described second
The sampling end of source electrode and the voltage collecting device is separately connected.
5. power module loop test circuit as claimed in claim 4, which is characterized in that including the voltage collecting device packet
Include the first intelligent voltage table and the second intelligent voltage table；Bridge on first sampling end of the first intelligent voltage table and described first
The drain electrode of arm power tube connects, the source of bridge arm power tube on the second sampling end of the first intelligent voltage table and described first
Pole, the source electrode of bridge arm power tube is separately connected in the source electrode of bridge arm power tube and third on second；
First sampling end of the second intelligent voltage table is connect with the second sampling end of the first intelligent voltage table, and described
Second sampling end of two intelligent voltage tables respectively with the source electrode of the first lower bridge arm power tube, the second lower bridge arm power tube
Source electrode and third lower bridge arm power tube source electrode connection.
6. power module loop test circuit as claimed in claim 4, which is characterized in that the test power supply is direct current
The anode in source, the test power supply is connect with the drain electrode of bridge arm power tube on described first, the cathode of the test power supply and institute
State the connection of third lower bridge arm power tube source electrode.
7. power module loop test circuit as described in claim 1, which is characterized in that the power module loop test electricity
Road further includes host computer, and the host computer is connect with the controller.
8. power module loop test circuit as claimed in claim 7, which is characterized in that the host computer is computer.
9. a kind of power module test equipment, which is characterized in that the power module test equipment includes such as claim 1 to 8
Power module loop test circuit described in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820603238.7U CN208060663U (en) | 2018-04-25 | 2018-04-25 | Power module loop test circuit and test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820603238.7U CN208060663U (en) | 2018-04-25 | 2018-04-25 | Power module loop test circuit and test equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111239576A (en) * | 2018-11-29 | 2020-06-05 | 株洲中车时代电气股份有限公司 | Constant power cycle test circuit and method based on power loss linear control |
| CN112964958A (en) * | 2021-04-27 | 2021-06-15 | 深圳吉华微特电子有限公司 | Reverse bias test method for high-power intelligent power module |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111239576A (en) * | 2018-11-29 | 2020-06-05 | 株洲中车时代电气股份有限公司 | Constant power cycle test circuit and method based on power loss linear control |
| CN111239576B (en) * | 2018-11-29 | 2021-08-10 | 株洲中车时代半导体有限公司 | Constant power cycle test circuit and method based on power loss linear control |
| CN112964958A (en) * | 2021-04-27 | 2021-06-15 | 深圳吉华微特电子有限公司 | Reverse bias test method for high-power intelligent power module |
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