CN220105205U - Test fixture for power circulation of half-bridge power module - Google Patents
Test fixture for power circulation of half-bridge power module Download PDFInfo
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- CN220105205U CN220105205U CN202321538818.XU CN202321538818U CN220105205U CN 220105205 U CN220105205 U CN 220105205U CN 202321538818 U CN202321538818 U CN 202321538818U CN 220105205 U CN220105205 U CN 220105205U
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- 238000012360 testing method Methods 0.000 title claims abstract description 88
- 238000001816 cooling Methods 0.000 claims abstract description 98
- 238000010438 heat treatment Methods 0.000 claims description 27
- 239000000110 cooling liquid Substances 0.000 claims description 14
- 239000002826 coolant Substances 0.000 claims description 10
- 238000012546 transfer Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000011324 bead Substances 0.000 claims description 3
- 239000012809 cooling fluid Substances 0.000 claims 4
- 230000001351 cycling effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 8
- 238000004088 simulation Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 101100117775 Arabidopsis thaliana DUT gene Proteins 0.000 description 2
- 101150091805 DUT1 gene Proteins 0.000 description 2
- 101100444142 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) dut-1 gene Proteins 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model relates to a testing tool for power cycle of a half-bridge power module. The test fixture comprises a cooling assembly, a first working position and a second working position, wherein the cooling assembly comprises a cooling shell, the surface of the cooling shell is provided with a first working position and a second working position which are used for respectively installing two half-bridge power modules, and a cooling flow channel is formed in the cooling shell; the module fixing assembly comprises a direct current bracket and an alternating current bracket which are respectively arranged at two sides of the cooling shell; the power terminal connecting assembly comprises two direct current positive electrode buses, a direct current negative electrode bus, a direct current positive switching bus and a direct current negative switching bus which are arranged on the direct current support, and an alternating current switching bus which is arranged on the alternating current support. The testing tool for the power cycle of the half-bridge power module has a compact overall structure, and can simultaneously provide power cycle testing for two half-bridge power modules.
Description
Technical Field
The utility model relates to the technical field of electronic device testing, in particular to a testing tool for power circulation of a half-bridge power module.
Background
The power cycle is a core means for verifying the reliability of the packaged device, the device reaches a specified junction temperature by applying corresponding load current to the tested device under a certain cooling condition, and the virtual junction temperature of the device is obtained by testing the current so as to reflect the stress of the module in a real working state. In the power cycle test process, reasonable clamping, cooling, insulation and electric connection modes are adopted, and the existing power cycle host is reasonably applied, so that an efficient and accurate test mode is achieved.
In the characteristic study of the half-bridge power module, a power cycle test host is generally adopted. The number of heating load channels of the current main stream power cycle test host is 2-4, the number of test channels corresponding to each load channel is 4-8, and the number of the current main stream power cycle test host does not contain a flow controller or is limited to 2-4. The number of test samples under a single working condition for module power cycle test in the power module acceptance standard is at least 6, and the heating current of each tested module needs to be consistent with the water inlet temperature. Obviously, in the prior art, a power cycle test host machine is matched with an independent test tool, so that the requirement that 6 or more modules simultaneously perform power cycle tests cannot be met.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model provides a testing tool for power cycle of a half-bridge power module, which has a compact overall structure and can simultaneously provide power cycle testing for two half-bridge power modules.
Specifically, the utility model provides a testing tool for power circulation of a half-bridge power module, which comprises the following components:
the cooling assembly comprises a cooling shell, a first station and a second station for respectively installing two half-bridge power modules are arranged on the surface of the cooling shell, a cooling flow channel is formed in the cooling shell, and cooling liquid is introduced into the cooling flow channel to actively cool the half-bridge power modules through forced convection;
the module fixing assembly comprises a direct current bracket and an alternating current bracket which are respectively arranged at two sides of the cooling shell;
the power terminal connecting assembly comprises two direct current positive bus bars, a direct current negative bus bar, a direct current positive transfer bus bar and a direct current negative transfer bus bar which are arranged on the direct current bracket, wherein the direct current positive bus bars are connected with the direct current positive transfer bus bars, heating current positive and testing current negative loading ends are arranged on the direct current positive transfer bus bars, and the two direct current positive bus bars are respectively used for being connected with two positive power terminals of a half-bridge power module arranged at the first station; the direct current negative bus is connected with a direct current negative switching bus, a heating current negative and a testing current positive loading end are arranged on the direct current negative bus, and the direct current negative bus is used for being connected with one positive power terminal of a half-bridge power module arranged at the second station; the power terminal connecting assembly further comprises an alternating current switching bus arranged on the alternating current bracket, and the alternating current switching bus is used for being connected into alternating current power terminals of the two half-bridge power modules so that a series structure is formed between the alternating current power terminals.
According to one embodiment of the utility model, the first station and the second station are arranged in parallel and spaced apart.
According to one embodiment of the utility model, the direct current support and the alternating current support are arranged in parallel, the first station and the second station are positioned between the direct current support and the alternating current support, and the length directions of the first station and the second station are perpendicular to the length directions of the direct current support and the alternating current support.
According to one embodiment of the utility model, the cooling assembly further comprises two cooling cover plates respectively arranged on two sides of the cooling shell opposite to the direct current and alternating current brackets, and the cooling cover plates and the cooling shell structure are matched to form two cooling flow channels in the cooling shell and are respectively used for actively cooling the two half-bridge power modules.
According to one embodiment of the utility model, the two cooling flow channels form a parallel structure and are symmetrically distributed in the cooling shell.
According to one embodiment of the utility model, the cooling assembly further comprises a sealing ring around the perimeter of the half-bridge power module, which is sealed with the cooling housing by the sealing ring.
According to one embodiment of the utility model, the module fixing assembly further comprises a plurality of pressing strips which are arranged on two sides of the first station and the second station, and the pressing strips are fixed on the cooling shell through screws so that the two half-bridge power modules are respectively pressed and fixed on the first station and the second station.
According to one embodiment of the utility model, a cooling liquid inlet is arranged on the cooling shell and positioned on one side of the direct current bracket, a cooling liquid outlet is arranged on the cooling shell and positioned on one side of the alternating current bracket, and two ends of the cooling flow channel are respectively communicated with the cooling liquid inlet and the cooling liquid outlet.
According to one embodiment of the utility model, a flow regulating valve for regulating the flow of the cooling liquid and a temperature sensor for detecting the temperature of the cooling liquid are arranged on the cooling liquid inlet.
The testing tool for the power cycle of the half-bridge power module has a compact overall structure, and can simultaneously provide power cycle testing for two half-bridge power modules. The test tool is matched with the power cycle test host, so that the test stations can be expanded to 4-8, and the test efficiency of power cycle is further improved.
It is to be understood that both the foregoing general description and the following detailed description of the present utility model are exemplary and explanatory and are intended to provide further explanation of the utility model as claimed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model. In the accompanying drawings:
fig. 1 shows a schematic structural diagram of a test fixture for power cycle of a half-bridge power module according to an embodiment of the present utility model.
FIG. 2 shows a schematic diagram of the cooling housing and seal ring configuration of one embodiment of the present utility model.
FIG. 3 shows a schematic diagram of a cooling water channel according to one embodiment of the present utility model.
Fig. 4 shows a schematic diagram of a half-bridge power module terminal connection according to one embodiment of the utility model.
FIG. 5 shows a schematic diagram of a test circuit during testing according to one embodiment of the utility model.
Fig. 6 is a graph of the change in junction temperature of a device under test during each cycle of a sinusoidal current signal in accordance with one embodiment of the present utility model.
FIG. 7 illustrates first and second station flow diagrams and flow simulation schematics according to one embodiment of the present utility model.
FIG. 8 shows a schematic diagram of inlet temperatures for a first station and a second station according to one embodiment of the utility model.
Wherein the above figures include the following reference numerals:
test fixture 100
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model. Furthermore, although terms used in the present utility model are selected from publicly known and commonly used terms, some terms mentioned in the present specification may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Furthermore, it is required that the present utility model is understood, not simply by the actual terms used but by the meaning of each term lying within.
Fig. 1 shows a schematic structural diagram of a test fixture for power cycle of a half-bridge power module according to an embodiment of the present utility model. FIG. 2 shows a schematic diagram of the cooling housing and seal ring configuration of one embodiment of the present utility model. FIG. 3 shows a schematic diagram of a cooling water channel according to one embodiment of the present utility model. As shown, the present utility model provides a test fixture 100 for half-bridge power module power cycle. The test fixture 100 mainly includes a cooling assembly, a module fixing assembly, and a power terminal connection assembly.
Wherein the cooling assembly comprises a cooling housing 101. Referring to fig. 2, a first station 103 and a second station 104 for respectively mounting two half-bridge power modules 102 are provided on the surface of the cooling case 101. Referring to fig. 3, a cooling flow passage 105 is formed in the cooling housing 101, and the cooling flow passage 105 is filled with a cooling liquid for actively cooling the half-bridge power module 102 during the test by forced convection. It is easy to understand that the first station 103 and the second station 104 provide working positions of the two half-bridge power modules 102 during the testing process, and make the heat dissipation surface of the half-bridge power modules 102 be convenient for fitting to the surface of the cooling housing 101, so as to facilitate the active cooling of the half-bridge power modules 102 by the cooling flow channels 105.
The module fixing assembly includes a dc bracket 106 and an ac bracket 107, which are respectively disposed at both sides of the cooling case 101, and mainly used for supporting the power terminal connection assembly.
The power terminal connection assembly includes two dc positive bus bars 108, one dc negative bus bar 109, one dc positive switching bus bar 110 and one dc negative switching bus bar 111 disposed on the dc bracket 106. The direct current positive bus 108 is connected with the direct current positive switching bus 110, and a heating current positive load end 121 and a testing current negative load end 121 are arranged on the direct current positive switching bus 110. The two dc positive bus bars 108 are respectively used for accessing two positive power terminals of the half-bridge power module 102 disposed at the first station 103. The dc negative bus 109 is connected to the dc negative switching bus 111, and the dc negative bus 109 is provided with a heating current negative and a test current positive load terminal 122. The dc negative bus 109 is used to access one positive power terminal of the half-bridge power module 102 disposed at the second station 104. The power terminal connection assembly further includes an ac switching bus 112 disposed on the ac bracket 107, where the ac switching bus 112 is configured to be connected to ac power terminals of the two half-bridge power modules 102 such that a series structure is formed between the ac power terminals. In the power cycle test process, the test fixture 100 is connected to a power cycle test host through a heating current positive and test current negative loading end 121 and a heating current negative and test current positive loading end 122 to form a heating load channel and a test channel.
According to the test fixture 100 provided by the utility model, based on the characteristics of the half-bridge power modules 102, the two half-bridge power modules 102 are connected in series in one heating load channel and one test channel, and the cooling flow channel 105 is arranged to ensure the temperature requirement of the power cycle test, so that the test fixture 100 can provide the power cycle test of the two half-bridge power modules 102 in one heating load channel and one test channel. Therefore, 1-4 test tools 100 are matched with the power cycle test host, so that the test stations can be expanded to 4-8, and the test efficiency of power cycle is further improved.
Preferably, the first station 103 and the second station 104 are arranged in parallel and spaced apart. More preferably, the dc support 106 and the ac support 107 are arranged in parallel. The first station 103 and the second station 104 are located between the direct current bracket 106 and the alternating current bracket 107, and the length direction of the first station 103 and the second station 104 is perpendicular to the length direction of the direct current bracket 106 and the alternating current bracket 107, so that the whole structure is simple and compact, and the assembly is easy.
Preferably, as shown in connection with fig. 1 and 2, the cooling assembly further comprises two cooling cover plates 113. Two cooling cover plates 113 are respectively provided on both sides of the cooling housing 101 opposite to the dc and ac brackets 106, 107. The cooling cover plate 113 and the cooling housing 101 are structurally matched to form two cooling flow channels 105 in the cooling housing 101, and the two cooling flow channels are respectively used for actively cooling the two half-bridge power modules 102 arranged on the first station 103 and the second station 104. Compared with the design that the cooling flow passage 105 is independently arranged on the cooling shell 101, the assembly structure is adopted to form the cooling flow passage 105, so that the manufacturing process of the cooling shell 101 is simpler and the assembly is convenient. More preferably, the cooling cover 113 is sealed to the cooling housing 101 by friction stir welding.
Preferably, referring to fig. 3, two cooling flow channels 105 form a parallel structure and are symmetrically distributed within the cooling housing 101. The trend of the two cooling flow channels 105 corresponds to the first station 103 and the second station 104 so as to meet the uniform distribution of the flow and the temperature of the cooling liquid to the first station 103 and the second station 104 and meet the power cycle measurement requirement.
Preferably, referring to FIG. 2, the cooling assembly further includes a seal ring 114. The sealing ring 114 is adapted to the shape of the outer periphery of the half-bridge power module 102, and is disposed around the periphery of the half-bridge power module 102. The half-bridge power module 102 is sealed to the cooling housing 101 by a sealing ring 114.
Preferably, referring to fig. 1, the module securing assembly further includes a plurality of beads 115. The pressing bars 115 are disposed at both sides of the first station 103 and the second station 104. The pressing bar 115 is fixed on the cooling shell 101 through the screw 116, so that the two half-bridge power modules 102 are respectively pressed and fixed on the first station 103 and the second station 104, and structural stability of the half-bridge power modules 102 in the testing process is maintained.
Preferably, referring to fig. 1 and 3, a coolant inlet 117 is provided on the cooling housing 101 on the side of the dc bracket 106, and a coolant outlet 118 is provided on the cooling housing 101 on the side of the ac bracket 107. Both ends of the cooling flow passage 105 communicate with a cooling liquid inlet 117 and a cooling liquid outlet 118, respectively. The coolant inlet 117 and the coolant outlet 118 are connected to an external cold source, and can form a complete cooling circuit to provide continuous cooling of the half-bridge power module 102. More preferably, a flow rate adjusting valve 119 and a temperature sensor 120 are provided at the coolant inlet 117, the flow rate adjusting valve 119 being used to adjust the flow rate of the coolant, and the temperature sensor 120 being used to detect the temperature of the coolant. It is easy to understand that the thermal resistance adjustment of the half-bridge power module 102 to be tested can be realized by controlling the flow rate and the temperature of the cooling liquid in the cooling flow channel 105, so that the junction temperature of the half-bridge power module 102 is changed without changing the heating load.
Fig. 4 shows a schematic diagram of a half-bridge power module terminal connection according to one embodiment of the utility model. FIG. 5 shows a schematic diagram of a test circuit during testing according to one embodiment of the utility model. Fig. 6 is a graph of the change in junction temperature of a device under test during each cycle of a sinusoidal current signal in accordance with one embodiment of the present utility model. Referring to fig. 4, 5 and referring to fig. 1, the heating load channel of the power test cycle host is connected to the heating current positive and test current negative loading ends 121, and the heating load channel is connected to the bus through the direct current positive switching bus110 and two dc positive bus bars 108 are connected to two positive power terminals 123 of the half-bridge power module 102 provided at the first station 103 (DUT 1), and are connected to one positive power terminal 123 of the half-bridge power module 102 provided at the second station 104 (DUT 2) through a heating current negative and test current positive loading end 122, a dc negative switching bus bar 111 and a dc negative bus bar 109. The ac power terminals 124 of the two half-bridge power modules 102 are connected in series by the ac switching bus 112, thereby forming a complete test heating loop connecting the upper bridge of the half-bridge power module 102 of the first station 103 and the lower bridge of the half-bridge power module 102 of the second station 104 in series, and heating current is from iload+ to Iload-as indicated by the solid arrow. Similarly, the test channel of the power test cycle host is connected to the upper bridge of the half-bridge power module 102 of the first station 103 and the lower bridge of the half-bridge power module 102 of the second station 104 through the heating current positive and the test current negative loading ends 121 and the heating current negative and the test current positive loading ends 122, and the test current is schematically shown by the direction of the open arrow from Isensing+ to Isensing-. Referring to fig. 5, a switch S1 is provided on the test heating circuit for controlling the on and off of the heating current source 126. A switch S2 is provided on the test loop for controlling the switching on and off of the junction temperature measurement current source 127. Referring to fig. 4, the gate driving voltage v_g1 is connected to the gate 125 of the upper bridge of the half-bridge power module 102 of the first station 103, and the gate driving voltage v_g2 is connected to the gate 125 of the lower bridge of the half-bridge power module 102 of the second station 104. Referring to fig. 6, a power cycle test period t cycle Comprises a junction temperature rising process t of a device to be measured on Junction temperature decrease process t off According to t on And t off It is required to alternately open the switches S1 and S2 and synchronously control the gate driving voltages v_gs1 and v_gs2 to turn on or off the corresponding upper and lower bridges. The switch S1 controls the on and off of the heating current source 126 to heat and cool the half-bridge power module 102, and the switch S2 controls the on and off of the junction temperature measuring current source 127 to generate a junction voltage, and the junction temperature change is obtained according to the characteristics of the half-bridge power module 102.
FIG. 7 illustrates first and second station flow diagrams and flow simulation schematics according to one embodiment of the present utility model. FIG. 8 shows a schematic diagram of inlet temperatures for a first station and a second station according to one embodiment of the utility model. As shown, taking a half-bridge power module 102 as an example, CFD simulation is performed on the test fixture 100, and the simulation results demonstrate the uniformity of performance of the first station 103 (DUT 1) and the second station 104 (DUT 2) of the test fixture 100, and the simulation results are referred to in table 1.
TABLE 1
Wherein the temperature difference of the water inlets of the DUT1 and the DUT2 is within 1 ℃; DUT1 and DUT2 meet the power cycle test accuracy requirement with the same heating current source 126i_heating, the same gate drive voltage Vgs 1=vgs 2, i.e. the same loss p_loss, with a maximum junction temperature Tjmax difference within 1 ℃.
It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present utility model without departing from the spirit and scope of the utility model. Therefore, it is intended that the present utility model cover the modifications and variations of this utility model provided they come within the scope of the appended claims and their equivalents.
Claims (9)
1. A test fixture for half-bridge power module power cycle, its characterized in that includes:
the cooling assembly comprises a cooling shell, a first station and a second station for respectively installing two half-bridge power modules are arranged on the surface of the cooling shell, a cooling flow channel is formed in the cooling shell, and cooling liquid is introduced into the cooling flow channel to actively cool the half-bridge power modules through forced convection;
the module fixing assembly comprises a direct current bracket and an alternating current bracket which are respectively arranged at two sides of the cooling shell;
the power terminal connecting assembly comprises two direct current positive bus bars, a direct current negative bus bar, a direct current positive transfer bus bar and a direct current negative transfer bus bar which are arranged on the direct current bracket, wherein the direct current positive bus bars are connected with the direct current positive transfer bus bars, heating current positive and testing current negative loading ends are arranged on the direct current positive transfer bus bars, and the two direct current positive bus bars are respectively used for being connected with two positive power terminals of a half-bridge power module arranged at the first station; the direct current negative bus is connected with a direct current negative switching bus, a heating current negative and a testing current positive loading end are arranged on the direct current negative bus, and the direct current negative bus is used for being connected with one positive power terminal of a half-bridge power module arranged at the second station; the power terminal connecting assembly further comprises an alternating current switching bus arranged on the alternating current bracket, and the alternating current switching bus is used for being connected into alternating current power terminals of the two half-bridge power modules so that a series structure is formed between the alternating current power terminals.
2. The test fixture for power cycling of a half-bridge power module of claim 1, wherein the first station and the second station are spaced apart in parallel.
3. The test fixture for power cycle of half-bridge power module of claim 2, wherein the dc support and the ac support are arranged in parallel, the first station and the second station are located between the dc support and the ac support, and the length directions of the two stations are perpendicular to the length directions of the dc support and the ac support.
4. The tool for testing the power cycle of the half-bridge power module according to claim 1, wherein the cooling assembly further comprises two cooling cover plates respectively arranged on two sides of the cooling shell opposite to the direct current and alternating current brackets, and the cooling cover plates and the cooling shell structure are matched to form two cooling flow channels in the cooling shell and are respectively used for actively cooling the two half-bridge power modules.
5. The fixture for half-bridge power module power cycle as defined in claim 4, wherein two of said cooling channels form a parallel structure and are symmetrically distributed within said cooling housing.
6. The test fixture for power cycling of a half-bridge power module of claim 1, wherein the cooling assembly further comprises a seal ring around a perimeter of the half-bridge power module, the half-bridge power module being sealed to the cooling housing by the seal ring.
7. The test fixture for power cycle of half-bridge power modules of claim 1, wherein said module securing assembly further comprises a plurality of beads disposed on both sides of said first and second stations, said beads being secured to said cooling housing by screws to compress and secure two of said half-bridge power modules to said first and second stations, respectively.
8. The test fixture for power cycle of half-bridge power module of claim 1, wherein a cooling fluid inlet is provided on the cooling housing and on one side of the dc support, a cooling fluid outlet is provided on the cooling housing and on one side of the ac support, and two ends of the cooling flow channel are respectively communicated with the cooling fluid inlet and the cooling fluid outlet.
9. The test fixture for power cycle of half-bridge power module of claim 8, wherein a flow regulating valve for regulating coolant flow and a temperature sensor for detecting coolant temperature are disposed on said coolant inlet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321538818.XU CN220105205U (en) | 2023-06-15 | 2023-06-15 | Test fixture for power circulation of half-bridge power module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321538818.XU CN220105205U (en) | 2023-06-15 | 2023-06-15 | Test fixture for power circulation of half-bridge power module |
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| CN220105205U true CN220105205U (en) | 2023-11-28 |
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| CN202321538818.XU Active CN220105205U (en) | 2023-06-15 | 2023-06-15 | Test fixture for power circulation of half-bridge power module |
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