Multi-modular water-cooling PWM (Pulse Width Modulation) rectifier

Abstract

The utility model provides a multi-modular water-cooling PWM (Pulse Width Modulation) rectifier, which relates to the technical field of rectifiers and comprises a cabinet body and an electrical structure. The cabinet body has a cabinet body main water pipe. The electrical structure comprises an alternating-current reactor, a rectification assembly, a chopping assembly and a direct-current reactor which are electrically connected in sequence. The alternating-current reactor, the rectifying assembly, the chopping assembly and the direct-current reactor are respectively provided with a first water pipe interface, a second water pipe interface, a third water pipe interface and a fourth water pipe interface which are communicated with a main water pipe of the cabinet body, and the first water pipe interface, the second water pipe interface, the third water pipe interface and the fourth water pipe interface and the main water pipe of the cabinet body are located in the same side direction; and cooling liquid is introduced to adjust the temperature of the electrical structure. According to the rectifier, through the arrangement of the water pipe structure, heat dissipation treatment can be carried out on an electrical structure in a water cooling mode, the heat dissipation efficiency is higher, meanwhile, due to the arrangement of the water pipe position, the water pipe is more convenient to maintain, the space utilization rate can be effectively increased, and the occupied space of the rectifier is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to rectifier technical field, especially relate to a modularization water -cooled PWM rectifier. BACKGROUND

[0002] With the high -speed development of hydrogen industry, PWM (Pulse Width Modulation) rectifier because of high efficiency, response speed fast in hydrogen field has obtained the extensive application. PWM rectifier mainly adopts IGBT (Insulated Gate Bipolar Transistor) power conversion and electric reactor filtering, and therefore IGBT and electric reactor are the main devices in the equipment. The traditional IGBT and electric reactor all adopt air cooling heat dissipation, and there is the shortcoming that heat dissipation efficiency is low, and heat dissipation effect is unstable. And because air cooling needs the air of cabinet outside and cabinet inside to flow, there is the limitation to the equipment environment. Air cooling heat dissipation needs to set up the air duct inside, leads to the equipment volume is big, and the space utilization is low. And the components of rectifier cabinet are all installed in the cabinet, leading to difficult dismounting when maintaining, and it is not easy to maintain. The cost is higher when a large number of applications.

[0003] Therefore, it is required to provide a modularization water -cooled PWM rectifier for guaranteeing heat dissipation effect, reducing the occupied space and improving the space utilization. UTILITY MODEL CONTENTS

[0004] The utility model provides a modularization water -cooled PWM rectifier, include: cabinet, have cabinet main water pipe, electrical structure includes the alternating -current electric reactor, rectification subassembly, chopper subassembly and direct current electric reactor of electrical connection in proper order, wherein, the alternating -current electric reactor, rectification subassembly, chopper subassembly with direct current electric reactor has the first water pipe interface, second water pipe interface, third water pipe interface and fourth water pipe interface of intercommunication cabinet main water pipe, first water pipe interface, second water pipe interface, third water pipe interface, fourth water pipe interface with cabinet main water pipe are all located in the same side direction, for the cooling liquid is passed in, adjusts the temperature of electrical structure.

[0005] Further, the cabinet has a first cavity defined by the structure thereof, the rectification subassembly and the chopper subassembly are arranged side by side in the first cavity, and are electrically connected by a unit DC busbar.

[0006] Further, the outgoing line direction of the rectification subassembly is the same as the outgoing line direction of the chopper subassembly.

[0007] Further, the rectification assembly comprises a rectification shell and a rectification element arranged in the rectification shell, and the chopper assembly comprises a chopper shell and a chopper element arranged in the chopper shell, wherein the shape of the chopper shell is completely same as the shape of the rectification shell.

[0008] Further, the cabinet body further has a second cavity defined by the structure of the cabinet body, the first cavity and the second cavity are communicated with each other along the height direction of the cabinet body, and the AC reactor and the DC reactor are arranged in the second cavity.

[0009] Further, the number of the rectification assemblies is multiple, and the AC reactor is connected with multiple rectification assemblies through a first connecting copper bar.

[0010] Further, the width of the connecting terminal of the AC reactor is same as the width of the connecting terminal of any rectification assembly, and the total width of the AC reactor is same as the total width of multiple rectification assemblies.

[0011] Further, the number of the chopper assemblies is multiple, and the DC reactor is connected with multiple chopper assemblies through a second connecting copper bar.

[0012] Further, the width of the connecting terminal of the DC reactor is same as the width of the connecting terminal of any chopper assembly, and the total width of the DC reactor is same as the total width of multiple chopper assemblies.

[0013] Further, the electrical structure further comprises an input AC frame circuit breaker which is arranged side by side with the AC reactor and is electrically connected through a third connecting copper bar.

[0014] Compared with the prior art, the multi-modular water-cooled PWM rectifier has at least the following beneficial effects:

[0015] 1. The rectifier is provided with a water pipe structure, can utilize water cooling mode to perform heat dissipation treatment on the electrical structure, has higher heat dissipation efficiency, the water pipe position is arranged (the first water pipe interface, the second water pipe interface, the third water pipe interface and the fourth water pipe interface are located on the same surface with the main water pipe), the water pipe maintenance is more convenient, the space utilization rate can be effectively improved, and the occupied space of the rectifier is reduced.

[0016] 2. The shape of the chopper shell in the rectifier is completely same as the shape of the rectification shell, so that the rectification assembly and the chopper assembly can adopt modular design, thereby having the characteristics of convenient disassembly and maintenance.

[0017] 3. The reactor in the rectifier has the same shape as the assembly and one-to-one correspondence, which can save the copper consumption.

[0018] 4. The input AC frame circuit breaker and AC reactor in the rectifier are placed in front and back, which can make the structure compact and occupy small volume, and further improve the space utilization. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present specification will be further illustrated in the form of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting, and in these embodiments, the same numbers represent the same structures, wherein:

[0020] Figure 1 is a structural schematic diagram of a multi-modular water-cooled PWM rectifier according to some embodiments of the present specification;

[0021] Figure 2 is a front view of a multi-modular water-cooled PWM rectifier according to some embodiments of the present specification;

[0022] Figure 3 is a connection and matching schematic diagram of a rectification assembly and a chopping assembly according to some embodiments of the present specification;

[0023] Figure 4 is a connection and matching schematic diagram of a rectification assembly and an AC reactor according to some embodiments of the present specification;

[0024] Figure 5 is a connection and matching schematic diagram of a rectification assembly and an AC reactor according to some embodiments of the present specification;

[0025] Figure 6 is a connection and matching schematic diagram of a chopping assembly and a DC reactor according to some embodiments of the present specification;

[0026] Figure 7 is a connection and matching schematic diagram of a chopping assembly and a DC reactor according to some embodiments of the present specification.

[0027] Figure number: 100-rectifier; 10-cabinet; 101-cabinet main water pipe; 102-first cavity; 103-second cavity; 11-AC reactor; 12-rectification assembly; 13-chopping assembly; 14-DC reactor; 15-AC frame circuit breaker; 16-first connection copper bar; 17-second connection copper bar; 18-third connection copper bar; 19-unit DC bus; 21-first water pipe interface; 22-second water pipe interface; 23-third water pipe interface; 24-fourth water pipe interface. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present specification, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some examples or embodiments of the present specification, and for those skilled in the art, the present specification can also be applied to other similar scenarios without creative labor. Unless it is obvious from the language environment or otherwise stated, the same reference numbers in the drawings represent the same structure or operation.

[0029] Please refer to Figures 1-7 The embodiment of the present application provides a multi-module water-cooled PWM rectifier 100. The rectifier 100 includes a cabinet 10 and an electrical structure. The cabinet 10 has a cabinet main water pipe 101; the electrical structure includes an alternating current reactor 11, a rectifying assembly 12, a chopping assembly 13 and a direct current reactor 14 connected in sequence. Among them, the aforementioned alternating current reactor 11, the aforementioned rectifying assembly 12, the aforementioned chopping assembly 13 and the aforementioned direct current reactor 14 have a first water pipe interface 21, a second water pipe interface 22, a third water pipe interface 23 and a fourth water pipe interface 24 communicating with the aforementioned cabinet main water pipe 101, the aforementioned first water pipe interface 21, the aforementioned second water pipe interface 22, the aforementioned third water pipe interface 23, the aforementioned fourth water pipe interface 24 and the aforementioned cabinet main water pipe 101 are located on the same side direction, for the cooling liquid, adjusting the temperature of the electrical structure.

[0030] It is worth noting that the rectifier 100 can use water cooling to dissipate heat from the electrical structure through the arrangement of the water pipe structure, which has higher heat dissipation efficiency. At the same time, the arrangement of the water pipe position (the first water pipe interface 21, the second water pipe interface 22, the third water pipe interface 23 and the fourth water pipe interface 24 are located on the same side direction), makes the water pipe maintenance more convenient, and can effectively improve the space utilization and reduce the occupied space of the rectifier 100.

[0031] In the present embodiment, the aforementioned cabinet 10 has a first cavity 102 defined by its own structure, the aforementioned rectifying assembly 12 and the aforementioned chopping assembly 13 are arranged side by side in the aforementioned first cavity 102, and are electrically connected by a unit DC bus 19.

[0032] It is worth noting that the rectifying assembly 12 and the chopping assembly 13 are arranged side by side in the first cavity 102, which has the advantages of saving space and improving structural compactness. It can make full use of the internal space of the cavity, reduce redundant layout, and make the rectifier 100 more compact as a whole, which is conducive to efficient arrangement in limited installation space. At the same time, by connecting the rectifying assembly 12 and the chopping assembly 13 through the unit DC bus 19, the need for complex cable wiring can be reduced, the material and labor cost is reduced, and the reliability of electrical connection is improved.

[0033] In the embodiment, the outgoing line direction of the rectifier assembly 12 is the same as the outgoing line direction of the chopper assembly 13.

[0034] As shown in the figure, the rectifier assembly 12 and the chopper assembly 13 can both adopt the incoming line from below and outgoing line from above form, and then realize the unit shared DC bus through the unit DC bus 19, effectively reducing the parasitic inductance of the DC bus caused by the structural design, and improving the product performance.

[0035] Please refer to Figure 3 , the rectifier assembly 12 includes a rectifier shell and a rectifier element built-in the rectifier shell, and the chopper assembly 13 includes a chopper shell and a chopper element built-in the chopper shell, wherein the shape of the chopper shell is completely the same as the shape of the rectifier shell.

[0036] It is worth mentioning that the shape of the chopper shell is completely the same as the shape of the rectifier shell, which is beneficial to modular design, thereby reducing production cost, and the unified shell shape supports standardized production, without the need to design and manufacture multiple shell molds for different components, significantly reducing research and manufacturing cost. In addition, during operation, if a module needs to be replaced, the unified shape of the shell can be interchanged, reducing the difficulty and time cost of maintenance. At the same time, it also helps to optimize the arrangement of components in the cavity, making the internal layout more orderly and the space utilization rate higher, while providing convenience for heat management and wiring.

[0037] In the embodiment, the cabinet 10 also has a second cavity 103 formed by its own structure, and the first cavity 102 and the second cavity 103 are communicated with each other along the height direction of the cabinet 10, and the AC reactor 11 and the DC reactor 14 are arranged in the second cavity 103.

[0038] It is worth mentioning that the first cavity 102 and the second cavity 103 are communicated along the height direction, which fully utilizes the vertical space of the cabinet 10, and effectively reduces the overall area of the rectifier 100.

[0039] As shown in Figure 4 and Figure 5 , the number of the rectifier assembly 12 is multiple, and the AC reactor 11 is connected with multiple rectifier assemblies 12 through the first connecting copper bar 16.

[0040] Optionally, the width of the connecting terminal of the AC reactor 11 is the same as the width of the connecting terminal of any rectifier assembly 12, and the total width of the AC reactor 11 is the same as the total width of multiple rectifier assemblies 12.

[0041] Specifically, in the embodiment, the widths of the AC reactor 11 and the three rectifier assemblies 12 are the same, and the output terminal width of the AC reactor 11 corresponds to the width position of the three rectifier assemblies 12, which can greatly shorten the distance of the first connecting copper bar 16 and effectively save costs.

[0042] As shown in Figure 6 and Figure 7 , the number of the aforementioned chopper assemblies 13 is multiple, and the aforementioned DC reactor 14 is connected to multiple aforementioned chopper assemblies 13 through the second connecting copper bar 17.

[0043] Optionally, the width of the connecting terminal of the aforementioned DC reactor 14 is the same as the width of the connecting terminal of any aforementioned chopper assembly 13, and the total width of the aforementioned DC reactor 14 is the same as the total width of multiple aforementioned chopper assemblies 13.

[0044] Specifically, in the embodiment, the width of the DC reactor 14 is the same as the width of the two chopper assemblies 13, and the wiring terminals correspond one by one, effectively shortening the distance of the second connecting copper bar 17 and effectively saving costs. The current in the cabinet 10 can pass through the DC reactor 14 and then pass through the DC frame circuit breaker to output to the outside of the cabinet.

[0045] In the embodiment, the aforementioned electrical structure further comprises an input AC frame circuit breaker 15, the aforementioned input AC frame circuit breaker 15 is arranged side by side with the aforementioned AC reactor 11, and is electrically connected through a third connecting copper bar 18.

[0046] It is worth noting that the input AC frame circuit breaker 15 is arranged side by side with the AC reactor 11, so that the electrical structure layout is more compact, the internal space of the cabinet 10 is saved, and the volume of the rectifier 100 is reduced. The electrical connection between the AC frame circuit breaker 15 and the AC reactor 11 is realized through the third connecting copper bar 18, which has a short wiring path and a simple structure, further reducing the cost of the copper bar and the installation complexity. Among them, the input AC frame circuit breaker 15 as a protection device at the input end can quickly cut off the circuit in the case of overload, short circuit and the like, protecting the rectifier 100 and external equipment from damage. The side-by-side arrangement and copper bar connection method not only improve the connection reliability, but also facilitate maintenance and replacement of the frame circuit breaker during operation, improving the operation convenience.

[0047] Finally, it should be understood that the foregoing embodiments in the specification are only used to illustrate the principles of the embodiments of the specification. Other variations can also belong to the scope of the specification. Therefore, as an example but not limitation, alternative configurations of the embodiments of the specification can be considered as consistent with the teachings of the specification. Accordingly, the embodiments of the specification are not limited to the embodiments explicitly introduced and described in the specification.

Claims

1. A multi-modular water-cooled PWM rectifier, characterized in that, The utility model relates to a cabinet body, a cabinet body main water pipe, an electrical structure, an alternating current reactor, a rectifier assembly, a chopper assembly and a direct current reactor are connected in sequence, wherein the alternating current reactor, the rectifier assembly, the chopper assembly and the direct current reactor have first water pipe interface, second water pipe interface, third water pipe interface and fourth water pipe interface that communicate cabinet body main water pipe respectively, and the first water pipe interface, the second water pipe interface, the third water pipe interface, the fourth water pipe interface and the cabinet body main water pipe are all located in the same side direction for the cooling liquid, adjusting the temperature of the electrical structure. The cabinet body has a first cavity defined by its structure, the rectifier assembly and the chopper assembly are arranged side by side in the first cavity, and are electrically connected by a unit DC busbar. The outgoing direction of the rectifier assembly is the same as that of the chopper assembly. The rectifier assembly includes a rectifier housing and a rectifier element built in the rectifier housing, and the chopper assembly includes a chopper housing and a chopper element built in the chopper housing, wherein the shape of the chopper housing is completely the same as that of the rectifier housing.

2. The multi-modular water-cooled PWM rectifier of claim 1, wherein, The cabinet body also has a second cavity defined by its structure, the first cavity and the second cavity are connected to each other along the height direction of the cabinet body, and the alternating current reactor and the direct current reactor are arranged in the second cavity.

3. A multi-modular water-cooled PWM rectifier according to claim 2, wherein, The number of the rectifier assemblies is multiple, and the alternating current reactor is connected to multiple rectifier assemblies through a first connecting copper bar.

4. The multi-modular water-cooled PWM rectifier of claim 2, wherein, The width of the connecting terminal of the alternating current reactor is the same as that of any rectifier assembly, and the total width of the alternating current reactor is the same as that of multiple rectifier assemblies.

5. The multi-modular water-cooled PWM rectifier of claim 2, wherein, The number of the chopper assemblies is multiple, and the direct current reactor is connected to multiple chopper assemblies through a second connecting copper bar.

6. A multi-modular water-cooled PWM rectifier according to claim 5, wherein, The width of the connecting terminal of the direct current reactor is the same as that of any chopper assembly, and the total width of the direct current reactor is the same as that of multiple chopper assemblies.

7. The multi-modular water-cooled PWM rectifier of claim 6, wherein, The electrical structure also includes an input AC frame circuit breaker arranged side by side with the alternating current reactor and electrically connected through a third connecting copper bar.

8. The multi-modular water-cooled PWM rectifier of claim 5, wherein, ​ 9. A multi-modular water-cooled PWM rectifier according to claim 8, wherein, ​ 10. The multi-modular water-cooled PWM rectifier of any of claims 1-9, wherein, ​

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