Rectifying device and acceleration power supply

Abstract

The application relates to a rectifying device and an acceleration power supply. The rectifying device comprises a cabinet body and a rectifying circuit. The cabinet body is provided with a high-voltage output end, a low-voltage output end and a plurality of input ends. The rectifying circuit is arranged in the cabinet body. The rectifying circuit comprises a plurality of rectifying arms which are electrically connected with the input ends one by one. The plurality of rectifying arms are arranged at intervals in the cabinet body. Cooling channels which penetrate the rectifying circuit along the axial direction of the cabinet body are formed between the rectifying arms. Each rectifying arm comprises a first bridge arm and a second bridge arm which are connected in series along the axial direction of the cabinet body. The first bridge arm is electrically connected with the high-voltage output end. The second bridge arm is connected with the low-voltage output end. The first bridge arm and the second bridge arm each comprise a plurality of diode modules which are connected in series. The plurality of diode modules are arranged at intervals along the axial direction of the cabinet body. Ventilation gaps which are communicated with the cooling channels are formed between the adjacent two diode modules. Each diode module comprises a plurality of diode elements which are connected in series. The problems of low space utilization and insufficient heat dissipation are solved.

Description

Technical Field

[0001] This application relates to the field of neutral beam injection acceleration power supply technology for nuclear fusion, and in particular to a rectifier and acceleration power supply. Background Technology

[0002] Nuclear fusion neutral beam injection systems require high-voltage, high-power, and long-term stable accelerating power supplies. These accelerating power supplies typically consist of multiple DC generators connected in series. Each DC generator includes a step-up transformer, a high-voltage rectifier, a DC filter, protection and interlocking systems, etc. The high-voltage rectifier is responsible for AC high-voltage rectification, inter-stage potential transfer, surge protection, and heat dissipation, and is a key component of the DC generator.

[0003] For nuclear fusion accelerator power supplies, high-voltage rectifiers have high internal voltage levels, a large number of diodes, large insulation distances, and large structural dimensions. They also need to meet mechanical strength requirements under transportation, installation, maintenance, and long-term operation conditions. In related technologies, high-voltage rectifiers often use a structure where multiple diodes are stacked in a straight line or arranged in a planar configuration to form a rectifier arm. This results in problems such as low space utilization and poor heat dissipation. Summary of the Invention

[0004] Therefore, it is necessary to provide a rectifier and acceleration power supply to address the problems of low space utilization and insufficient heat dissipation in current high-voltage rectifiers.

[0005] The specific plan is as follows:

[0006] In a first aspect, this application provides a rectifier device, comprising:

[0007] The cabinet is equipped with a high-voltage output terminal, a low-voltage output terminal, and multiple input terminals.

[0008] A rectifier circuit is disposed in the cabinet. The rectifier circuit includes multiple rectifier arms, each of which is electrically connected to the input terminal. The multiple rectifier arms are spaced apart circumferentially along the cabinet. A heat dissipation channel is formed between each rectifier arm, which passes through the rectifier circuit along the axial direction of the cabinet. Each rectifier arm includes a first bridge arm and a second bridge arm connected in series along the axial direction of the cabinet. The first bridge arm is electrically connected to the high voltage output terminal, and the second bridge arm is electrically connected to the low voltage output terminal.

[0009] The first bridge arm and the second bridge arm each include multiple diode modules connected in series. The multiple diode modules are spaced apart along the axial direction of the cabinet. A ventilation gap communicating with the heat dissipation channel is formed between two adjacent diode modules. Each diode module includes multiple diode elements connected in series.

[0010] The technical solution will be further explained below:

[0011] In one embodiment, the number of input terminals is three, namely the U-phase input terminal, the V-phase input terminal, and the W-phase input terminal;

[0012] The number of rectifier arms is three, namely a U-phase rectifier arm, a V-phase rectifier arm, and a W-phase rectifier arm. The U-phase rectifier arm, the V-phase rectifier arm, and the W-phase rectifier arm are arranged at intervals along the circumference of the cabinet and together form a cylindrical structure. The heat dissipation channel is formed at the center of the cylindrical structure. The U-phase rectifier arm is electrically connected to the U-phase input terminal, the V-phase rectifier arm is electrically connected to the V-phase input terminal, and the W-phase rectifier arm is electrically connected to the W-phase input terminal.

[0013] In one embodiment, each of the diode modules includes a mounting plate on which a heat sink is disposed, and the diode element is disposed on the heat sink.

[0014] In one embodiment, the heat sink includes multiple heat dissipation fins, the mounting plate has a through-hole for mounting, the mounting hole is connected to the ventilation gap, a mounting shaft is provided in the mounting hole, multiple heat dissipation fins and multiple diode elements are provided on the mounting shaft, and the heat dissipation fins and the diode elements are alternately arranged along the mounting shaft.

[0015] And / or, the mounting plate has a fan-shaped structure, and a plurality of the diode elements are arranged at intervals on the mounting plate along the outer edge of the mounting plate;

[0016] And / or, each of the diode modules further includes an RC circuit disposed on the mounting plate and electrically connected to the diode element.

[0017] In one embodiment, both the first bridge arm and the second bridge arm further include an axial support member, which passes through the axial direction of the cabinet to support all the diode modules in the first bridge arm or the second bridge arm.

[0018] In one embodiment, the axial support is a hollow structure, and a conductive element is provided in the axial support. All the diode modules in the first bridge arm or all the diode modules in the second bridge arm are connected in series through the corresponding conductive element.

[0019] In one embodiment, the rectifier further includes a radial support member supported between the inner wall of the cabinet and the rectifier circuit, the radial support member being made of insulating material.

[0020] In one embodiment, the rectifier circuit further includes a first conductive frame, which is disposed at the end of the first bridge arm opposite to the second bridge arm. The first conductive frame is electrically connected to the first bridge arm of all the rectifier arms and to the high voltage output terminal. The first conductive frame is provided with a first heat dissipation port that is aligned with the heat dissipation channel.

[0021] And / or, the rectifier circuit further includes a second conductive frame, which is disposed at the end of the second bridge arm opposite to the first bridge arm. The second conductive frame is electrically connected to the second bridge arm of all the rectifier arms and electrically connected to the low-voltage output terminal. The second conductive frame is provided with a second heat dissipation port that is aligned with the heat dissipation channel.

[0022] And / or, each of the rectifier arms further includes an intermediate conductor electrically connected between the first bridge arm and the second bridge arm, and the intermediate conductor is electrically connected to the corresponding input terminal.

[0023] In one embodiment, shielding covers are provided at both ends of the first bridge arm and at both ends of the second bridge arm.

[0024] In one embodiment, the cabinet has an air inlet at one end in the axial direction and an air outlet at the other end.

[0025] Secondly, this application also provides an accelerating power supply, including the aforementioned rectifier.

[0026] In the aforementioned rectifier and accelerating power supply, multiple rectifier arms are spaced circumferentially along the cabinet, fully utilizing the circumferential installation space inside the cabinet. Furthermore, by configuring each rectifier arm as a first bridge arm and a second bridge arm connected in series along the cabinet's axial direction, and by configuring each first and second bridge arm to include multiple diode modules spaced axially along the cabinet, with each diode module comprising multiple diode elements connected in series, the diode elements on the rectifier arm form multiple independently assembleable modules, achieving modular installation of the diode elements and making the entire rectifier circuit more compact and orderly arranged within the cabinet. In addition, by forming heat dissipation channels that penetrate the rectifier circuit along the cabinet's axial direction between each rectifier arm, and by creating ventilation gaps between adjacent diode modules, the cooling airflow inside the cabinet can flow through each diode module along the heat dissipation channels and ventilation gaps, thereby carrying away heat from the diode modules and improving the problems of uneven airflow and insufficient localized heat dissipation inside traditional high-voltage rectifier cabinets. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown as examples only and not necessarily to scale. In the accompanying drawings:

[0030] Figure 1 This is a schematic diagram of the structure of a rectifier device according to one embodiment.

[0031] Figure 2 This is a schematic diagram of the rectifier device according to one embodiment from another perspective.

[0032] Figure 3 This is a left view of the rectifier circuit of a rectifier device according to an embodiment.

[0033] Figure 4 This is a schematic diagram of the structure of the first bridge arm / second bridge arm of a rectifier device according to an embodiment.

[0034] Figure 5 This is a schematic diagram of the diode module of a rectifier device according to one embodiment.

[0035] Figure 6 This is a front view of the rectifier circuit of a rectifier device according to an embodiment.

[0036] Figure 7 The figure shows the temperature analysis results after one hour of rated operation of the rectifier device in one embodiment.

[0037] Explanation of reference numerals in the attached figures:

[0038] 10. Cabinet; 11. High-voltage output terminal; 12. Low-voltage output terminal; 13. U-phase input terminal; 14. V-phase input terminal; 15. W-phase input terminal; 16. Air inlet; 17. Air outlet; 20. Rectifier arm; 201. U-phase rectifier arm; 202. V-phase rectifier arm; 203. W-phase rectifier arm; 21. First bridge arm; 210. Diode module; 211. Diode element; 212. Mounting plate; 213. Mounting port; 214. Mounting shaft; 215. Heat sink fins; 216. RC circuit; 217. Ventilation gap; 22. Second bridge arm; 23. Heat dissipation channel; 31. Axial support; 32. Radial support; 331. First conductive frame; 332. Second conductive frame; 333. Intermediate conductive component. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0045] One embodiment of this application provides a rectifier. The rectifier is applicable to direct current generators (DCGs) for nuclear fusion accelerators, used to rectify the three-phase AC high voltage output from a step-up transformer into DC high voltage, and is also suitable for other engineering scenarios such as series output of multi-stage DC power supplies. Specifically, see [link to relevant documentation]. Figure 1 as well as Figure 2 One embodiment of the rectifier includes a cabinet 10 and a rectifier circuit. Wherein:

[0046] The cabinet 10 is equipped with a high-voltage output terminal 11, a low-voltage output terminal 12, and multiple input terminals. Specifically, there are two high-voltage output terminals 11. One high-voltage output terminal 11 is used to connect to the low-voltage side of the next-stage DC power supply device, and the other high-voltage output terminal 11 is used to connect to a DC filter, thus forming a series boost output structure for a multi-stage nuclear fusion acceleration power supply. The input terminals are used to input AC power.

[0047] The rectifier circuit is located in the cabinet 10. The rectifier circuit includes multiple rectifier arms 20, each of which is electrically connected to a corresponding input terminal. Figure 3 Multiple rectifier arms 20 are spaced apart circumferentially along the cabinet 10, and a heat dissipation channel 23 is formed between each rectifier arm 20, extending axially through the rectifier circuit of the cabinet 10. Combined with... Figure 1 Each rectifier arm 20 includes a first bridge arm 21 and a second bridge arm 22 connected in series along the axial direction of the cabinet 10. The first bridge arm 21 is electrically connected to the high voltage output terminal 11, and the second bridge arm 22 is connected to the low voltage output terminal.

[0048] Further, see Figure 4 as well as Figure 5 Both the first bridge arm 21 and the second bridge arm 22 include multiple diode modules 210 connected in series. The multiple diode modules 210 are spaced apart along the axial direction of the cabinet 10. A ventilation gap 217 communicating with the heat dissipation channel 23 is formed between two adjacent diode modules 210. Each diode module 210 includes multiple diode elements 211 connected in series.

[0049] In the above-mentioned rectifier device, by arranging multiple rectifier arms 20 at intervals along the circumference of the cabinet 10, the circumferential installation space inside the cabinet 10 is fully utilized. At the same time, by configuring each rectifier arm 20 as a first bridge arm 21 and a second bridge arm 22 connected in series along the axial direction of the cabinet 10, and by configuring the first bridge arm 21 and the second bridge arm 22 to include multiple diode modules 210 arranged at intervals along the axial direction of the cabinet 10, and each diode module 210 including multiple diode elements 211 connected in series, the diode elements 211 on the rectifier arm 20 form multiple independently assembleable modules, realizing the modular installation of the diode elements 211, and making the arrangement of the entire rectifier circuit in the cabinet 10 more compact and orderly. Furthermore, since a heat dissipation channel 23 is formed between each rectifier arm 20, which runs through the rectifier circuit along the axial direction of the cabinet 10, and a ventilation gap 217 is formed between two adjacent diode modules 210, the cooling airflow inside the cabinet 10 can flow through each diode module 210 along the heat dissipation channel 23 and the ventilation gap 217, thereby removing the heat from the diode module 210 and improving the problem of uneven airflow and insufficient local heat dissipation inside the traditional high-voltage rectifier cabinet.

[0050] Furthermore, the rectifier circuit layout of this application is applicable to different voltage levels. For different voltage levels, only the insulation distance of the cabinet 10 needs to be adjusted; there is no need to change the internal rectifier circuit layout. For example, for rectifiers of 200kV to 600kV, the cabinet 10 is designed with a smaller insulation distance; for rectifiers of 800kV to 1000kV, the cabinet 10 is designed with a larger insulation distance. Rectifiers of different voltage levels use the same rectifier arm 20; only the length of the cabinet 10, the inner diameter of the cabinet 10, the top flange, and the insulation distance between the input and output terminals need to be adjusted according to the voltage level. This enables a serialized design of the rectifier, reducing the number of parts, improving manufacturing efficiency, and enhancing interchangeability.

[0051] See Figure 2In some embodiments, the cabinet 10 has three input terminals: U-phase input terminal 13, V-phase input terminal 14, and W-phase input terminal 15. Understandably, U-phase input terminal 13 can be used to connect U-phase current, V-phase input terminal 14 can be used to connect V-phase current, and W-phase input terminal 15 can be used to connect V-phase current.

[0052] See also Figure 2 There are three rectifier arms 20: a U-phase rectifier arm 201, a V-phase rectifier arm 202, and a W-phase rectifier arm 203. Combined with... Figure 3 The U-phase rectifier arm 201, V-phase rectifier arm 202, and W-phase rectifier arm 203 are arranged at intervals along the circumference of the cabinet 10 and together form a cylindrical structure, with the heat dissipation channel 23 formed at the center of the cylindrical structure. The U-phase rectifier arm 201 is electrically connected to the U-phase input terminal 13, the V-phase rectifier arm 202 is electrically connected to the V-phase input terminal 14, and the W-phase rectifier arm 203 is electrically connected to the W-phase input terminal 15. This ensures that the rectifier device can be used to rectify three-phase AC high voltage into DC high voltage.

[0053] Understandably, in other embodiments, the rectifier is used to rectify two-phase AC power into DC power. In this case, it is sufficient to configure two input terminals and two rectifier arms 20 accordingly, which will not be elaborated here.

[0054] See Figure 5 In some embodiments, each diode module 210 includes a mounting plate 212, on which a heat sink is disposed, and the diode element 211 is disposed on the heat sink. The mounting plate 212 can serve as a mounting base for the diode element 211 and the heat sink, enabling modular mounting of the diode element 211 and the heat sink. Furthermore, by placing the diode element 211 on the heat sink, the heat sink can further improve the heat dissipation effect on the diode element 211.

[0055] See also Figure 5 In some embodiments, the heat sink includes multiple heat dissipation fins 215, and the mounting plate 212 has a through mounting opening 213. The mounting opening 213 communicates with the ventilation gap 217. A mounting shaft 214 is provided in the mounting opening 213. Multiple heat dissipation fins 215 and multiple diode elements 211 are provided on the mounting shaft 214, and the heat dissipation fins 215 and diode elements 211 are arranged alternately along the mounting shaft 214. In this way, the cooling airflow in the cabinet 10 can enter the mounting opening 213 through the heat dissipation channel 23 and the ventilation gap 217, and exchange heat with the heat dissipation fins 215 in the mounting opening 213. At the same time, the heat dissipation fins 215 exchange heat with the adjacent diode elements 211, so as to achieve rapid cooling of the diode elements 211 and greatly improve the heat dissipation effect.

[0056] See also Figure 5 In some embodiments, the mounting plate 212 has a fan-shaped structure, such as a 1 / 3 circular fan, that is, the central angle corresponding to the fan-shaped mounting plate 212 is 120°. In this way, when the U-phase rectifier arm 201, the V-phase rectifier arm 202 and the W-phase rectifier arm 203 are arranged along the circumference of the cabinet 10, they can be enclosed together to form a cylindrical structure, making full use of the circumferential space inside the cabinet 10.

[0057] Furthermore, multiple diode elements 211 are arranged at intervals along the outer edge of the mounting plate 212. Specifically, the mounting plate 212 has multiple mounting ports 213, such as two, three, four or more, which are arranged at intervals along the outer edge of the mounting plate 212. Each mounting port 213 is provided with multiple heat dissipation fins 215 and multiple diode elements 211. The multiple heat dissipation fins 215 and multiple diode elements 211 are arranged alternately along a direction that is approximately parallel to the outer edge of the mounting plate 212. This ensures heat dissipation while making the arrangement of diode elements 211 more reasonable and compact.

[0058] See Figure 5 Each diode module 210 also includes an RC circuit 216, which is mounted on the mounting plate 212 and electrically connected to the diode element 211. The RC circuit 216 is used for filtering. Furthermore, there are multiple RC circuits 216, each corresponding to a different mounting port 213. The RC circuits 216 are located further away from the outer edge of the mounting plate 212 than the mounting ports 213, and each RC circuit 216 is electrically connected to the diode element 211 within its corresponding mounting port 213.

[0059] For example, the mounting plate 212 is made of an insulating material, such as a phenolic resin board, to ensure insulation.

[0060] Optionally, in some embodiments, the outer diameter of the cylindrical rectifier circuit can be designed to be 2000 mm, and the circumference of the cylindrical rectifier circuit is approximately 6.28 m. After deducting the gaps between the three-phase rectifier arms 20, each phase rectifier arm 20 can utilize an outer circumference of approximately 1.9 m.

[0061] Optionally, in some embodiments, a single bridge arm (first bridge arm 21 or second bridge arm 22) includes 10 diode modules 210. Further, the axial mounting spacing between two adjacent diode modules 210 can be designed to be 110mm, and the total length of the 10 diode modules 210 is approximately 1100mm. Considering the remaining end structures, the axial length of a single bridge arm can be 1160mm.

[0062] See Figure 4Both the first bridge arm 21 and the second bridge arm 22 include an axial support member 31, which passes through the axial direction of the cabinet 10 to support all the diode modules 210 in the first bridge arm 21 or the second bridge arm 22. This allows multiple diode modules 210 to form an integral bridge arm structure.

[0063] Furthermore, the number of axial support members 31 is multiple, such as two, three, four or more, and the multiple axial support members 31 are arranged at intervals, thereby improving the support effect on the diode module 210 and ensuring the structural stability of the first bridge arm 21 or the second bridge arm 22.

[0064] For example, in some embodiments, the axial support 31 is a hollow structure, and a conductive element is provided in the axial support 31. All diode modules 210 in the first bridge arm 21 or all diode modules 210 in the second bridge arm 22 are connected in series through the corresponding conductive element. This ensures the electrical connection of all diode modules 210 in the first bridge arm 21 or all diode modules 210 in the second bridge arm 22.

[0065] In some embodiments, the axial support 31 can be a fiberglass shaft, which is a round rod with a diameter of 80mm. Based on the weight of a single diode module 210, the additional weight of the axial support shaft, and a 10% safety margin, the calculated weight for the strength of a single bridge arm can be taken as 515kg. Simultaneously, the deflection of the fiberglass support shaft is calculated. The national standard allows a maximum allowable deformation of 2L / 250mm for load-bearing components, and the allowable value for a 1160mm long component is 9.28mm. Given the specificity of this invention, it is temporarily set at 10mm. Under operating and transportation conditions, the deflection and bending stress of the axial support 31 are both less than the allowable values.

[0066] See Figure 1 In some embodiments, the rectifier further includes radial supports 32, which are supported between the inner wall of the cabinet 10 and the rectifier circuit. The radial supports 32 are made of insulating material. Specifically, there can be multiple radial supports 32, which are arranged at intervals along the axial and circumferential directions of the cabinet 10. Specifically, at least some of the radial supports 32 are located between the bottom of the cabinet 10 and the rectifier circuit to bear the main weight of the rectifier circuit; at least some of the radial supports are located on the upper part or upper side of the cabinet 10 to limit the displacement of the rectifier circuit during transportation, installation, and operation. Furthermore, the radial supports are embedded within the cabinet 10 to reduce the space occupied by the external support structure and improve the overall structural compactness.

[0067] See Figure 1 as well as Figure 6In one embodiment, the rectifier circuit further includes a first conductive frame 331. The first conductive frame 331 is disposed at the end of the first bridge arm 21 facing away from the second bridge arm 22. The first conductive frame 331 is electrically connected to the first bridge arms 21 of all rectifier arms 20 and to the high-voltage output terminal 11. The first conductive frame 331 has a first heat dissipation port aligned with the heat dissipation channel 23. Exemplarily, the first conductive frame 331 is a triangular metal frame, which encloses the first heat dissipation port. The three corners of the triangular metal frame are respectively electrically connected to the first bridge arms 21 of the U-phase rectifier arm 201, the V-phase rectifier arm 202, and the W-phase rectifier arm 203 through conductive posts, and are electrically connected to the high-voltage output terminal 11 through another conductive post. This achieves electrical connection between the first bridge arms 21 of all rectifier arms 20 and the high-voltage output terminal 11. At the same time, the first heat dissipation port of the first conductive frame 331 aligned with the heat dissipation channel 23 reduces airflow obstruction, enhances the axial and longitudinal ventilation capacity of the cabinet 10, and improves the cooling effect. Therefore, the first conductive frame 331 simultaneously has the functions of electrical connection, mechanical fixation, and ventilation.

[0068] Similarly, the rectifier circuit also includes a second conductive frame 332, which is located at the end of the second bridge arm 22 facing away from the first bridge arm 21. The second conductive frame 332 is electrically connected to the second bridge arms 22 of all rectifier arms 20 and to the low-voltage output terminal 12. The second conductive frame 332 has a second heat dissipation port aligned with the heat dissipation channel 23. For example, the second conductive frame 332 can also be a triangular metal frame, which encloses the second heat dissipation port. The three corners of the triangular metal frame are respectively electrically connected to the second bridge arms 22 of the U-phase rectifier arm 201, V-phase rectifier arm 202, and W-phase rectifier arm 203 via conductive posts, and are electrically connected to the low-voltage output terminal 12 via another conductive post. This achieves electrical connection between the second bridge arms 22 of all rectifier arms 20 and the low-voltage output terminal 12. Simultaneously, the second heat dissipation port on the second conductive frame 332, aligned with the heat dissipation channel 23, reduces airflow obstruction, enhances the axial longitudinal ventilation capacity of the cabinet 10, and improves cooling performance. Therefore, the second conductive frame 332 simultaneously has the functions of electrical connection, mechanical fixation, and ventilation.

[0069] See also Figure 6 Each rectifier arm 20 also includes an intermediate conductive element 333, which is electrically connected between the first bridge arm 21 and the second bridge arm 22, thereby achieving electrical communication between the first bridge arm 21 and the second bridge arm 22. Furthermore, the intermediate conductive element 333 is electrically connected to the corresponding input terminal, so that the current input to the input terminal can be simultaneously guided to the first bridge arm 21 and the second bridge arm 22 through the intermediate conductive element 333.

[0070] Optionally, in some embodiments, shielding covers are provided at both ends of the first bridge arm 21 and both ends of the second bridge arm 22. The shielding covers are used to reduce the electric field concentration near the ends of the first bridge arm 21 or the second bridge arm 22. Exemplarily, the shielding cover is a metal cover with the same shape as the mounting plate 212, thereby preventing the shielding cover from blocking the airflow of the heat dissipation channel 23.

[0071] See Figure 1 Optionally, in some embodiments, the cabinet 10 has an air inlet 16 at one end in the axial direction and an air outlet 17 at the other end. Cooling gas is thus introduced into the cabinet 10 through the air inlet 16. The cooling gas can then enter the ventilation gaps 217 between the diode modules 210 along the heat dissipation channel 23 to remove heat from the diode modules 210, and finally flow out from the air outlet 17. Optionally, in some embodiments, the cooling gas can be SF6. Figure 7 As shown, Figure 7 The results of the temperature analysis after one hour of rated operation of the rectifier are shown. The highest temperature of the SF6 gas was 60.1℃. The diode temperature was 110.1℃, which meets the design requirements and has a margin.

[0072] One embodiment of this application also provides an accelerating power supply, including the rectifier of any of the above embodiments.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A rectifier, characterized in that, include: The cabinet is equipped with a high-voltage output terminal, a low-voltage output terminal, and multiple input terminals. A rectifier circuit is disposed in the cabinet. The rectifier circuit includes multiple rectifier arms, each of which is electrically connected to the input terminal. The multiple rectifier arms are spaced apart circumferentially along the cabinet. A heat dissipation channel is formed between each rectifier arm, which passes through the rectifier circuit along the axial direction of the cabinet. Each rectifier arm includes a first bridge arm and a second bridge arm connected in series along the axial direction of the cabinet. The first bridge arm is electrically connected to the high voltage output terminal, and the second bridge arm is electrically connected to the low voltage output terminal. The first bridge arm and the second bridge arm each include multiple diode modules connected in series. The multiple diode modules are spaced apart along the axial direction of the cabinet. A ventilation gap communicating with the heat dissipation channel is formed between two adjacent diode modules. Each diode module includes multiple diode elements connected in series.

2. The rectifier according to claim 1, characterized in that, The number of input terminals is three, namely the U-phase input terminal, the V-phase input terminal and the W-phase input terminal; The number of rectifier arms is three, namely a U-phase rectifier arm, a V-phase rectifier arm, and a W-phase rectifier arm. The U-phase rectifier arm, the V-phase rectifier arm, and the W-phase rectifier arm are arranged at intervals along the circumference of the cabinet and together form a cylindrical structure. The heat dissipation channel is formed at the center of the cylindrical structure. The U-phase rectifier arm is electrically connected to the U-phase input terminal, the V-phase rectifier arm is electrically connected to the V-phase input terminal, and the W-phase rectifier arm is electrically connected to the W-phase input terminal.

3. The rectifier according to claim 1, characterized in that, Each of the diode modules includes a mounting plate with a heat sink, and the diode element is disposed on the heat sink.

4. The rectifier according to claim 3, characterized in that: The heat sink includes multiple heat dissipation fins. The mounting plate has a through-hole for mounting. The mounting hole communicates with the ventilation gap. A mounting shaft is provided in the mounting hole. Multiple heat dissipation fins and multiple diode elements are provided on the mounting shaft. The heat dissipation fins and the diode elements are alternately arranged along the mounting shaft. And / or, the mounting plate has a fan-shaped structure, and a plurality of the diode elements are arranged at intervals on the mounting plate along the outer edge of the mounting plate; And / or, each of the diode modules further includes an RC circuit disposed on the mounting plate and electrically connected to the diode element.

5. The rectifier according to claim 1, characterized in that, Both the first bridge arm and the second bridge arm also include an axial support member, which passes through the axial direction of the cabinet to support all the diode modules in the first bridge arm or the second bridge arm.

6. The rectifier according to claim 5, characterized in that, The axial support is a hollow structure, and a conductive element is provided in the axial support. All the diode modules in the first bridge arm or all the diode modules in the second bridge arm are connected in series through the corresponding conductive element.

7. The rectifier according to claim 1, characterized in that, The rectifier also includes a radial support member, which is supported between the inner wall of the cabinet and the rectifier circuit. The radial support member is made of insulating material.

8. The rectifier according to claim 1, characterized in that: The rectifier circuit further includes a first conductive frame, which is disposed at the end of the first bridge arm away from the second bridge arm. The first conductive frame is electrically connected to the first bridge arm of all the rectifier arms and to the high voltage output terminal. The first conductive frame is provided with a first heat dissipation port that is aligned with the heat dissipation channel. And / or, the rectifier circuit further includes a second conductive frame, which is disposed at the end of the second bridge arm opposite to the first bridge arm. The second conductive frame is electrically connected to the second bridge arm of all the rectifier arms and electrically connected to the low-voltage output terminal. The second conductive frame is provided with a second heat dissipation port that is aligned with the heat dissipation channel. And / or, each of the rectifier arms further includes an intermediate conductor electrically connected between the first bridge arm and the second bridge arm, and the intermediate conductor is electrically connected to the corresponding input terminal.

9. The rectifier according to claim 1, characterized in that, Both ends of the first bridge arm and both ends of the second bridge arm are provided with shielding covers; The cabinet has an air inlet at one end in the axial direction and an air outlet at the other end.

10. An accelerating power supply, characterized in that, The rectifier includes any one of claims 1-9.

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