CN220822930U - AC/DC bidirectional conversion device - Google Patents

Abstract

The utility model discloses an alternating current-direct current bidirectional conversion device, which relates to the technical field of rectification and inversion, and comprises an installation main body and a conversion assembly; the crimping assembly comprises a top assembly connected with the top plate and a bottom assembly connected with the bottom plate; the top component comprises a spherical bolt and a top pressing block, and the spherical bolt penetrates through the top plate from top to bottom and is in threaded fit with the bolt component arranged on the top plate; the end face of the pressing block is provided with a spherical groove matched with the bottom end of the spherical bolt; the bottom component comprises a bottom pressing block, the outer wall of the lower end of the bottom pressing block is contracted inwards to form a plug column, and the plug column is sleeved with a butterfly spring; compared with the traditional pressure application mode, the pressure connection assembly applies torque to three or four threaded connections around the assembly, the process is simplified, and only a moment is applied to one spherical screw in the middle, so that the fastening of the conversion assembly is realized; while the pressure exerted on the conversion assembly can be cushioned and reacted by the belleville springs.

Description

AC/DC bidirectional conversion device

Technical Field

The utility model relates to the technical field of rectification and inversion, in particular to an alternating current-direct current bidirectional conversion device.

Background

The rectification and inversion often need to use an Insulated Gate Bipolar Transistor (IGBT), the device for rectification and inversion is formed by electrically connecting a plurality of IGBTs, and because a large amount of heat is generated when the IGBTs are used due to the fact that the current is large, the rectification and inversion devices mostly need to be provided with a plurality of radiating plates for radiating, but at present, the problem that the positioning and connection among the IGBTs, the plurality of radiating plates and auxiliary connection components in the rectification and inversion devices are large exists, and the problems that the volume of the rectification and inversion devices is large and the connection of all devices is unstable can be caused.

Disclosure of utility model

The utility model aims to provide an alternating current-direct current bidirectional conversion device so as to solve the problems in the background technology.

The technical aim of the utility model is realized by the following technical scheme:

The embodiment of the application provides an alternating current-direct current bidirectional conversion device which comprises a mounting main body and a conversion assembly, wherein the conversion assembly is positioned in the mounting main body, and the mounting main body is provided with a crimping assembly for fastening the conversion assembly; the installation main body comprises a top plate and a bottom plate which are arranged on the upper side and the lower side, and two side plates which are arranged on the left side and the right side; the top ends of the two side plates are respectively connected with the two sides of the top plate, and the bottom ends of the two side plates are respectively connected with the two sides of the bottom plate;

The crimping assembly comprises a top assembly connected with the top plate and a bottom assembly connected with the bottom plate; the top component comprises a spherical bolt and a top pressing block, the spherical bolt penetrates through the top plate from top to bottom and is in threaded fit with the bolt component arranged on the top plate, and one end of the spherical bolt extending out of the bottom surface of the top plate is abutted with the top pressing block; the end face of the top pressing block is provided with a spherical groove matched with the bottom end of the spherical bolt, and the end face of the top pressing block opposite to the spherical groove is abutted with the end face of the transistor water cooling plate positioned at the uppermost part;

The bottom component comprises a bottom pressing block, the outer wall of the lower end of the bottom pressing block is contracted inwards to form a plug column, and the plug column is sleeved with a butterfly spring; the top end of the bottom pressing block is abutted with the end face of the transistor water cooling plate positioned at the lowest position, and when the transformation assembly moves downwards under the action of the ball-type bolt, the butterfly spring can be compressed.

The beneficial effects of the utility model are as follows: the structure of the installation main body reduces the volume of the whole equipment and improves the space utilization rate while realizing the installation function of the equipment, and the whole structure is simple and easy and is convenient for the installation and connection of internal devices; compared with the traditional pressure applying mode, the pressure welding assembly applies torque to three or four threaded connections around the assembly, the sequence and the magnitude of multiple force application are very strict, meanwhile, whether the required pressure is met or not is judged by judging the torque, the pressure welding assembly is easily influenced by factors such as materials, surface roughness, concentricity and the like of screws or nuts, and even if the torque reaches a specified value, the pressure is likely to not reach; in the scheme, the working procedure is simplified, and only moment is applied to one spherical screw in the middle, so that the fastening of the transformation assembly is realized; while the pressure exerted on the conversion assembly can be cushioned and reacted by the belleville springs.

On the basis of the technical scheme, the utility model can be improved as follows.

Further, the bottom assembly further comprises a limit bolt, the limit bolt penetrates through the bottom plate from bottom to top, and one end of the limit bolt extending out of the upper portion of the bottom plate extends into the bottom pressing block.

The beneficial effects of adopting the further scheme are as follows: the deformation of the belleville spring can be indirectly reflected according to the displacement of the limit bolt extending out of the lower end face of the bottom plate, so that the pressure is reflected, and the bottom pressing block can be limited to move.

Further, the bottom assembly further comprises an annular piece, the bottom pressing block is located in the annular piece, and the inner wall of the annular piece is in sliding fit with the outer wall of the upper end of the bottom pressing block.

Further, the conversion assembly comprises a plurality of conversion transistors and a plurality of transistor water-cooling plates, wherein the plurality of transistor water-cooling plates are stacked in sequence, each conversion transistor is respectively located between two adjacent transistor water-cooling plates, the end face of each conversion transistor is abutted with the outer wall of each transistor water-cooling plate, and the plurality of conversion transistors are connected and form an alternating current connection end and a direct current connection end.

The beneficial effects of adopting the further scheme are as follows: because a plurality of conversion transistors can produce a large amount of heat when the during operation, consequently all set up the water-cooling board between each conversion transistor, realize the two-sided heat dissipation of conversion transistor to improve radiating efficiency.

Further, for each transistor water cooling plate, a plurality of cooling channels are arranged in the transistor water cooling plate, the head end and the tail end of each cooling channel are sequentially connected, and the head end of the first cooling channel and the tail end of the last cooling channel in the cooling channels respectively form a water inlet port and a water outlet port of the transistor water cooling plate, and the water inlet port is connected with the output end of the cooling water pump.

Further, for each cooling flow channel, the cooling flow channel forms a first end face towards one side of one cooling surface of the transistor water-cooling plate, and forms a second end face towards one side of the other cooling surface of the transistor water-cooling plate, the width of the first end face is larger than that of the second end face, and the cooling surfaces formed by the first end faces are abutted against one side with a large heating end face in the conversion transistor.

The beneficial effects of adopting the further scheme are as follows: compared with the traditional water-cooling plate flow channel, the two sides of the flow channel are symmetrical, and the size and the flow velocity of the flow channel are designed according to the maximum power consumption, so that the flow waste can be caused on the side with smaller heating value; in this scheme, set up the cross-section of cooling runner as "trapezoidal", the one side that the width is big is first terminal surface, the one side that the width is little is the second terminal surface, in the in-service use, the one side that the heat productivity of transform transistor is big with the cooling surface butt that each first terminal surface formed, the little one side that the heat productivity of transform transistor and the cooling surface butt that each second terminal surface formed, still can make the radiating effect of the cooling surface of each first terminal surface satisfy the requirement of the great one side of heat productivity of transform transistor through accurate analysis heat source position and consumption, the radiating effect of the cooling surface that makes each second terminal surface form satisfies the requirement of the less one side of heat productivity of transform transistor, realize satisfying the radiating requirement while reducing the flow requirement, thereby further reduce the flow requirement of cooling water pump, finally realize reducing equipment cost and volumetric purpose.

Further, the conversion assembly comprises 6 conversion transistors, and a plurality of resistors are connected to the 6 conversion transistors, wherein,

The 6 conversion transistors are formed into three groups of combination transistors in pairs; in the single group of combination transistors, the collector of one of the conversion transistors is connected with the emitter of the other conversion transistor; in the three groups of combined transistors, the emitters of the three conversion transistors which are not connected are connected, and the collectors of the three conversion transistors which are not connected are connected and form a direct current connection end together; in the three groups of combined transistors, the connection points of the two conversion transistors are output together to form an alternating current connection end;

the resistors are connected in series, and the head end and the tail end of the resistors after being connected in series are respectively connected with the two ends of the direct current connecting end.

The beneficial effects of adopting the further scheme are as follows: this has the advantage of achieving the function and purpose of switching between ac and dc.

Further, the device further comprises a resistance water cooling plate for cooling the plurality of resistors, wherein the input end of the resistance water cooling plate is communicated with the water inlet port, and the output end of the resistance water cooling plate is communicated with the water outlet port.

The beneficial effects of adopting the further scheme are as follows: this can be implemented as resistive heat dissipation where operation occurs.

Further, insulating blocks are arranged between the top pressing block and the transistor water-cooling plate positioned at the uppermost position and between the bottom pressing block and the transistor water-cooling plate positioned at the lowermost position.

Further, in the above components located between the crimping assemblies, a limiting structure is arranged between any two adjacent components, and the limiting structure comprises at least two limiting bolts and a plurality of limiting jacks corresponding to the limiting bolts; the limiting plug pin is connected with one of any two adjacent components, and the limiting jack is formed in the end face of the other of any two adjacent components and is matched with the limiting plug pin.

The beneficial effects of adopting the further scheme are as follows: all be provided with limit structure between two adjacent parts, it is spacing to it through two spacing bolts, not only can be fine location center align, can also prevent to rotate, reduce the dependence to the frock, reduce the frock expense, reduce process reduce cost.

Compared with the prior art, the utility model has at least the following beneficial effects:

A water cooling plate is arranged between each conversion transistor to realize double-sided heat dissipation of the conversion transistor, so that the heat dissipation efficiency is improved; compared with the traditional water-cooling plate flow channel, the two sides of the flow channel are symmetrical, and the size and the flow rate of the flow channel are designed according to the maximum power consumption, so that the flow waste is caused on the side with smaller heating value; in this scheme, set up the cross-section of cooling runner as "trapezoidal", the one side that the width is big is first terminal surface, the one side that the width is little is the second terminal surface, in the in-service use, the one side that the heat productivity of transform transistor is big with the cooling surface butt that each first terminal surface formed, the little one side that the heat productivity of transform transistor and the cooling surface butt that each second terminal surface formed, still can make the radiating effect of the cooling surface of each first terminal surface satisfy the requirement of the great one side of heat productivity of transform transistor through accurate analysis heat source position and consumption, the radiating effect of the cooling surface that makes each second terminal surface form satisfies the requirement of the less one side of heat productivity of transform transistor, realize satisfying the radiating requirement while reducing the flow requirement, thereby further reduce the flow requirement of cooling water pump, finally realize reducing equipment cost and volumetric purpose.

Compared with the traditional pressure applying mode, the pressure applying method has the advantages that torque is applied to three or four threaded connections around the assembly, the sequence and the magnitude of multiple force application are very strict, meanwhile, whether the required pressure is met or not is judged by judging the torque, the pressure is easily influenced by factors such as materials, surface roughness, concentricity and the like of screws or nuts, and even if the torque reaches a specified value, the pressure is likely not to be met; in this scheme simplify the process, only need apply moment to a spherical screw in the middle to realize transform the fastening of subassembly, and come buffering and reaction through the belleville spring and exert the pressure on transform the subassembly, and can be according to the displacement volume that limiting bolt stretches out the terminal surface under the bottom plate come indirect reaction belleville spring's deflection, thereby reflect the pressure size, can also restrict the end briquetting simultaneously and take place to remove.

Through all being provided with limit structure between two adjacent parts, it is spacing to it through two spacing bolts, not only can be fine location center align, can also prevent to rotate, reduce the dependence to the frock, reduce the frock expense, reduce process reduce cost.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments 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 drawings:

FIG. 1 is a schematic perspective view of a conversion device according to an embodiment of the present utility model;

FIG. 2 is a schematic plan view of a conversion device according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic diagram of a cooling flow channel according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram illustrating the connection of the conversion transistors according to an embodiment of the present utility model;

FIG. 6 is a schematic view of one of the angles of the transformation device according to an embodiment of the present utility model;

fig. 7 is a schematic view of another angle of the transformation device according to the embodiment of the present utility model.

In the drawings, the reference numerals and corresponding part names:

1. a conversion transistor; 2. a transistor water cooling plate; 3. a cooling flow passage; 4. a first end face; 5. a second end face; 6. a resistance water cooling plate; 7. a top plate; 8. a bottom plate; 9. a side plate; 10. a ball bolt; 11. a bolt assembly; 12. pressing a block; 13. a belleville spring; 15. a bottom pressing block; 16. a limit bolt; 17. a ring member; 18. an insulating block; 19. a limit structure; 20. a DC connection terminal; 21. an alternating current connection end; 22. a main water inlet pipe; 23. a main water outlet pipe; 24. and a branch pipe.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of 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, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. 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 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 definition or explanation thereof is necessary in the following figures.

In the description of the embodiments of the present utility model, it should be noted that, if the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the referred device or element must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

In the description of the embodiments of the present utility model, "plurality" means at least 2.

In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Examples

The embodiment of the application provides an alternating current-direct current bidirectional conversion device which comprises a mounting main body and a conversion assembly, wherein the conversion assembly is positioned in the mounting main body, and the mounting main body is provided with a crimping assembly for fastening the conversion assembly.

Optionally, the installation main body comprises a top plate 7 and a bottom plate 8 which are arranged on the upper side and the lower side, and two side plates 9 which are arranged on the left side and the right side; the top ends of the two side plates 9 are respectively connected with the two sides of the top plate 7, and the bottom ends of the two side plates 9 are respectively connected with the two sides of the bottom plate 8.

In order to reduce the volume of the whole device and improve the space utilization rate, the installation main body can be formed by four plate bodies, namely, two installation main bodies are arranged up and down, namely, two installation main bodies are arranged left and right or front and back, and two installation main bodies are arranged in pairs, as shown in fig. 1 and 2, the whole structure is simple, and the installation and the connection of internal devices are also convenient.

Alternatively, the above-described press-fit assembly includes a top assembly connected to the top plate 7 and a bottom assembly connected to the bottom plate 8, respectively.

The top assembly comprises a ball-type bolt 10 and a top pressing block 12, the ball-type bolt 10 penetrates through the top plate 7 from top to bottom and is in threaded fit with a bolt assembly 11 arranged on the top plate 7, and one end of the ball-type bolt 10 extending out of the bottom surface of the top plate 7 is abutted with the top pressing block 12; the end face of the top pressing block 12 is provided with a spherical groove matched with the bottom end of the spherical bolt 10, and the end face of the top pressing block 12 opposite to the spherical groove is abutted with the end face of the transistor water cooling plate 2 positioned at the uppermost part.

The top component is used for fastening the conversion component in the installation column by rotating the ball bolt 10, as shown in fig. 1 and 3, the bolt component 11 is fixedly connected with the top plate 7, and the conversion component is compressed by rotating the ball bolt 10 from the upper side of the top plate 7 to move downwards, so that the contact between the transistor water cooling plate 2 and the conversion transistor 1 in the conversion component is more compact and stable; the centerline of the ball screw 10 preferably coincides with the centerline of the conversion assembly.

Optionally, the bottom assembly comprises a bottom pressing block 15, wherein the outer wall of the lower end of the bottom pressing block 15 is contracted inwards to form a plug post, and the plug post is sleeved with a belleville spring 13; the top end of the bottom pressing block 15 is abutted against the end face of the transistor water cooling plate 2 located at the lowest position, and when the conversion assembly moves downwards under the action of the ball bolt 10, the belleville spring 13 can be compressed.

Wherein, the bottom component and the top component are arranged on the bottom plate 8 to be matched for use, so that the conversion component between the bottom component and the top component is more stable; specifically, the traditional pressure welding assembly applies torque to three or four threaded connections around the assembly, the sequence and the magnitude of the multiple force application are very strict, and meanwhile, whether the required pressure is reached or not is judged by judging the torque only, and the pressure is easily influenced by factors such as materials, surface roughness, concentricity and the like of a screw or a nut, and even if the torque reaches a specified value, the pressure is likely to not reach; in this solution, the process is simplified, and only a moment needs to be applied to one spherical screw in the middle, so as to fasten the conversion assembly, and the belleville spring 13 is used for buffering and reacting the pressure applied on the conversion assembly.

Optionally, the bottom assembly further includes a limit bolt 16, where the limit bolt 16 penetrates through the bottom plate 8 from bottom to top, and one end extending above the bottom plate 8 extends into the bottom pressing block 15.

Wherein, set up the spacing bolt 16 that runs through on bottom plate 8, and the top of spacing bolt 16 stretches into the inside of end briquetting 15, as shown in fig. 3, can be according to the displacement volume that spacing bolt 16 stretches out bottom plate 8 lower terminal surface come indirect reaction belleville spring 13's deflection to reflect the pressure size, can also restrict end briquetting 15 simultaneously and take place to remove.

Optionally, the bottom assembly further comprises an annular member 17, the bottom pressing block 15 is located in the annular member 17, and an inner wall of the annular member 17 is in sliding fit with an outer wall of an upper end of the bottom pressing block 15.

The annular piece 17 is sleeved with the bottom pressing block 15, so that the bottom pressing block 15 can be effectively prevented from being displaced on the horizontal plane, and the belleville spring 13 is prevented from being horizontally displaced during compression.

Optionally, insulating blocks 18 are disposed between the top pressing block 12 and the transistor water-cooling plate 2 located at the uppermost position, and between the bottom pressing block 15 and the transistor water-cooling plate 2 located at the lowermost position.

The insulation block 18 can space the crimping assembly and the conversion assembly, so that the safety of the whole equipment is improved, and the condition that the crimping assembly is electrified is avoided.

Optionally, in each part between the crimping assemblies, a limiting structure 19 is arranged between any two adjacent parts, and the limiting structure 19 comprises at least two limiting bolts and a plurality of limiting jacks corresponding to the limiting bolts; the limiting plug pin is connected with one of any two adjacent components, and the limiting jack is formed in the end face of the other of any two adjacent components and is matched with the limiting plug pin.

The components between the crimping assemblies comprise a transistor water cooling plate 2, a conversion transistor 1, an insulating block 18 and the like, as shown in fig. 3, namely, a limiting structure 19 is arranged between two adjacent components, and the two limiting bolts limit the components, so that the components not only can be aligned in a good positioning center, but also can be prevented from rotating, the dependence on tools is reduced, the tool cost is reduced, and the process cost is reduced.

The conversion assembly comprises a plurality of conversion transistors 1 and a plurality of transistor water-cooling plates 2, wherein the plurality of transistor water-cooling plates 2 are sequentially stacked, each conversion transistor 1 is respectively positioned between two adjacent transistor water-cooling plates 2, the end face of each conversion transistor 1 is abutted with the outer wall of each transistor water-cooling plate 2, and the plurality of conversion transistors 1 are connected and form an alternating current connection end 21 and a direct current connection end 20.

Wherein, through the connection among the conversion transistors 1, the purpose of outputting DC two-phase electricity through the DC connection end 20 when three-phase AC is input through the AC connection end 21 and outputting AC through the AC connection end 21 when DC is input through the DC connection end 20 is realized; the plurality of conversion transistors 1 generate a large amount of heat during operation, so that water cooling plates are arranged among the conversion transistors 1 to realize double-sided heat dissipation of the conversion transistors 1, thereby improving heat dissipation efficiency; specifically, referring to fig. 1, 2 and 3, in the conversion assembly, a plurality of conversion transistors 1 and a plurality of transistor water-cooling plates 2 are disposed at intervals therebetween, and the transistor water-cooling plates 2 should be disposed at the beginning.

Optionally, the conversion assembly comprises 6 conversion transistors 1, and a plurality of resistors are connected to the 6 conversion transistors 1, wherein,

Every two of the 6 conversion transistors 1 form three groups of combination transistors; in a single set of combination transistors, the collector of one of the conversion transistors 1 is connected to the emitter of the other conversion transistor 1; in the three groups of combination transistors, the emitters of the three conversion transistors 1 which are not connected are connected, and the collectors of the three conversion transistors 1 which are not connected are connected, and form a direct current connection terminal 20 together; in the three groups of combined transistors, the connection points of the two conversion transistors 1 are output together to form an alternating current connection end 21; the resistors are connected in series, and the head end and the tail end of the resistors after being connected in series are respectively connected with the two ends of the direct current connection end 20.

Wherein 6 conversion transistors 1 are used in the present solution; specifically, as shown in fig. 3, the stack between the 6 transform transistors 1 and the plurality of transistor water-cooling plates 2 may be as well, and a mode that the 6 transform transistors 1 and the 7 transistor water-cooling plates 2 are stacked in turn may be adopted, so that the transistor water-cooling plates 2 are at the uppermost and the lowermost; referring to fig. 5, a schematic circuit diagram of the 6 conversion transistors 1 is shown, so as to form a dc connection terminal 20 and an ac connection terminal 21 for implementing ac-dc conversion and output, wherein R, S, T is a three-phase ac connection terminal in fig. 5, and P and N are dc connection terminals 20.

Specifically, the traditional water-cooling plate and the electrode copper bar are integrated (machined or welded), the direction or the size of the electrode is not adjustable, and the volume utilization rate is low; the application designs the electrode copper bars (the alternating current connecting end 21 and the direct current connecting end 20) and the water cooling plate to be connected by screws, and the electrode copper bars can adjust the direction and the size according to parameters such as voltage and current, so as to improve the volume utilization rate, as shown in fig. 6 and 7.

For each transistor water cooling plate 2, a plurality of cooling flow channels 3 are arranged in the transistor water cooling plate 2, the head end and the tail end of each cooling flow channel 3 are sequentially connected, the head end of the first cooling flow channel 3 and the tail end of the last cooling flow channel 3 in the cooling flow channels 3 respectively form a water inlet port and a water outlet port of the transistor water cooling plate 2, and the water inlet port is connected with the output end of a cooling water pump.

The transistor water cooling plates 2 are provided with a plurality of cooling flow channels 3 inside, and the principle of the transistor water cooling plates 2 is that cooling liquid is continuously introduced into a plurality of cooling pipelines inside, and the cooling surfaces of the transistor water cooling plates 2 are in contact with the heating surfaces of the conversion transistors 1, so that heat emitted by the conversion transistors 1 is transferred to the transistor water cooling plates 2, and therefore the continuously flowing cooling liquid takes away the emitted heat, so that the cooling effect is realized.

Specifically, the traditional crimping assembly is formed by directly connecting multiple branch pipes, so that the connector is more, the reliability is low, and bubbles are easy to exist; in the scheme, a water inlet and outlet main pipeline is designed, so that the number of external connectors is reduced, and the reliability is improved; through setting up the trunk line, the liquid velocity of flow is slow this moment, and gas is easy to separate out, simultaneously according to the principle that gas moved up, sets up the trunk line for advancing down, goes up the play, with gaseous discharge, reduces thermal resistance, improves radiating efficiency.

Optionally, the device further comprises a resistance water cooling plate 6 for cooling the plurality of resistors, an input end of the resistance water cooling plate 6 is communicated with the water inlet port, and an output end of the resistance water cooling plate 6 is communicated with the water outlet port.

The resistor water cooling plate 6 takes away heat generated by the resistor during operation; specifically, referring to fig. 6 and 7, each water inlet port is connected to the main water inlet pipe 22 through the branch pipe 24, each water outlet port is connected to the main water outlet pipe 23 through the branch pipe 24, in actual use, the main water inlet pipe 22 is connected to the output end of the cooling water pump, the input end of the cooling water pump can be connected to the source of the cooling liquid, for the resistive water cooling plate 6, the input end of the resistive water cooling plate 6 is also communicated with the main water inlet pipe 22, and the output end of the resistive water cooling plate 6 is communicated with the main water outlet pipe 23; in the actual use process, the connection between each branch pipe 24 and the main water inlet pipe 22 and the main water outlet pipe 23 can refer to the connection modes in fig. 6 and 7, or can be realized by different connection modes, the cooling liquid is input into each transistor water cooling plate 2 and each resistor water cooling plate 6, and the cooling liquid is uniformly or respectively discharged from the output ports by each transistor water cooling plate 2 and each resistor water cooling plate 6, which is not described herein again.

For each cooling flow channel 3, a first end face 4 is formed on one side of one cooling face of the transistor water-cooling plate 2, a second end face 5 is formed on one side of the other cooling face of the transistor water-cooling plate 2, the width of the first end face 4 is larger than that of the second end face 5, and the cooling faces formed by the first end faces 4 are abutted against one side of the conversion transistor 1 where the heating end face is large.

Wherein, for the conversion transistor 1 (IGBT), the top and bottom of the crimp package IGBT are the collector C and emitter E of the device, respectively, and are also cooling surfaces; each chip in the IGBT device is directly fixed on the C pole and is connected with the E pole through a flexible spring, the thermal resistance from the chip to the C pole is far smaller than that from the chip to the E pole, and more heat generated by the chip is transmitted out from the C pole, so that the heat generated by the C face of the conversion transistor 1 is larger than that generated by the E face; because the two sides of the traditional water-cooling plate flow channel are symmetrical, the size and the flow speed of the flow channel are designed according to the maximum power consumption, and therefore the flow waste is caused on the side with smaller heating value; in this scheme, the cross section of the cooling flow channel 3 is set to be "trapezoid", as shown in fig. 4, the side with large width is the first end face 4, the side with small width is the second end face 5, when in actual use, the side with large heating value of the conversion transistor 1 is abutted against the cooling face formed by each first end face 4, the side with small heating value of the conversion transistor 1 is abutted against the cooling face formed by each second end face 5, the heat dissipation effect of the cooling face formed by each first end face 4 can meet the requirement of the side with large heating value of the conversion transistor 1 through accurate analysis of the heat source position and the power consumption, the heat dissipation effect of the cooling face formed by each second end face 5 meets the requirement of the side with small heating value of the conversion transistor 1, the flow requirement is reduced while the heat dissipation requirement is met, thereby further reducing the flow requirement of the cooling water pump, and finally the purposes of reducing the equipment cost and the volume are achieved.

Preferably, the cooling flow channels 3 can be uniformly arranged in the transistor water cooling plate 2, and the cooling flow channels 3 are connected end to end and communicated and output an input end and an output end for respectively inputting cooling liquid and discharging cooling liquid.

Specifically, the traditional water cooling plates are the same, and as other small water cooling plates (such as a resistance water cooling plate 6) are added, the flow resistance of part of the branches is large, and when the branches reach the rated flow, the other branches exceed the rated flow, so that the flow is rich, and waste is formed; according to the scheme, at least two water cooling plates are designed according to actual power consumption, so that flow resistance of each branch is equal, flow is rated, flow waste is reduced, and equipment volume and cost are reduced; when the heat dissipation efficiency is required to be better on both sides of the transistor, the two transistor water-cooling plates 2 may be overlapped, so that the side of the transistor water-cooling plate 2 with higher heat dissipation efficiency may be respectively abutted against different conversion transistors 1, as shown in fig. 3.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims (9)

1. The alternating current-direct current bidirectional conversion device is characterized by comprising a mounting main body and a conversion assembly, wherein the conversion assembly is positioned in the mounting main body, and the mounting main body is provided with a compression joint assembly for fastening the conversion assembly; the mounting main body comprises a top plate, a bottom plate and two side plates, wherein the top plate and the bottom plate are arranged on the upper side and the lower side, and the two side plates are arranged on the left side and the right side; the top ends of the two side plates are respectively connected with the two sides of the top plate, and the bottom ends of the two side plates are respectively connected with the two sides of the bottom plate;

The conversion assembly comprises a plurality of conversion transistors and a plurality of transistor water-cooling plates, wherein the transistor water-cooling plates are sequentially stacked, each conversion transistor is respectively positioned between two adjacent transistor water-cooling plates, the end face of each conversion transistor is abutted with the outer wall of each transistor water-cooling plate, and the conversion transistors are connected and form an alternating current connection end and a direct current connection end;

The crimping assembly comprises a top assembly connected with the top plate and a bottom assembly connected with the bottom plate; the top assembly comprises a ball-type bolt and a top pressing block, the ball-type bolt penetrates through the top plate from top to bottom and is in threaded fit with the bolt assembly arranged on the top plate, and one end of the ball-type bolt extending out of the bottom surface of the top plate is abutted with the top pressing block; the end face of the top pressing block is provided with a spherical groove matched with the bottom end of the spherical bolt, and the end face of the top pressing block opposite to the spherical groove is abutted with the end face of the transistor water cooling plate positioned at the uppermost part;

the bottom assembly comprises a bottom pressing block, wherein the outer wall of the lower end of the bottom pressing block is contracted inwards to form a plug column, and the plug column is sleeved with a belleville spring; the top end of the bottom pressing block is abutted with the end face of the transistor water cooling plate located at the lowest position, and when the transformation assembly moves downwards under the action of the ball-type bolt, the butterfly spring can be compressed.

2. An ac/dc bi-directional converter according to claim 1, wherein said base assembly further comprises a stop bolt extending through said base plate from bottom to top, and wherein an end of said stop bolt extending above said base plate extends into said base press block.

3. An ac/dc bi-directional converter according to claim 2, wherein said base assembly further comprises an annular member, said base block is positioned within said annular member, and an inner wall of said annular member is in sliding engagement with an upper outer wall of said base block.

4. An ac/dc bidirectional conversion apparatus according to claim 3, wherein for each of the transistor water-cooling plates, a plurality of cooling channels are provided inside the transistor water-cooling plate, the head ends and the tail ends of the plurality of cooling channels are connected in sequence, and the head end of the first cooling channel and the tail end of the last cooling channel among the plurality of cooling channels respectively form a water inlet port and a water outlet port of the transistor water-cooling plate, and the water inlet port is connected to an output end of a cooling water pump.

5. The ac/dc bi-directional converter of claim 4 wherein for each of said cooling channels, a side of said cooling channel facing one of said cooling surfaces of said transistor water-cooled plate forms a first end surface and a side facing the other cooling surface of said transistor water-cooled plate forms a second end surface, said first end surface having a width greater than a width of said second end surface, said cooling surfaces formed by said first end surfaces each abutting a side of said converter transistor having a larger heat generating end surface.

6. An ac/dc bi-directional conversion apparatus according to claim 5, wherein said conversion means comprises 6 of said conversion transistors, said 6 conversion transistors further having a plurality of resistors connected thereto, wherein,

The 6 conversion transistors are formed into three groups of combination transistors in pairs; in a single set of said combination transistors, the collector of one of said conversion transistors is connected to the emitter of the other conversion transistor; in the three groups of the combined transistors, the emitters of the three conversion transistors which are not connected are connected, and the collectors of the three conversion transistors which are not connected are connected and form the direct current connection end together; in the three groups of the combination transistors, the connection points of the two conversion transistors are output together to form the alternating current connection end;

And the resistors are connected in series, and the head end and the tail end of the resistors after being connected in series are respectively connected with the two ends of the direct current connecting end.

7. The ac/dc bi-directional converter of claim 6 further comprising a resistive water cooling plate for cooling a plurality of said resistors, said resistive water cooling plate having an input in communication with said water inlet port and an output in communication with said water outlet port.

8. An ac/dc bi-directional converter according to claim 7, wherein insulating blocks are provided between the top pressing block and the transistor water-cooling plate located at the uppermost position and between the bottom pressing block and the transistor water-cooling plate located at the lowermost position.

9. An ac/dc bidirectional conversion apparatus according to any one of claims 1 to 8, wherein a limit structure is provided between any two adjacent components among the components located between the crimping assemblies, the limit structure including at least two limit pins and a plurality of limit insertion holes corresponding to the limit pins; the limiting plug pin is connected with one of the two adjacent parts, and the limiting jack is formed in the end face of the other of the two adjacent parts and is matched with the limiting plug pin.