Air-cooled high-capacity thyristor power module

Abstract

The utility model discloses an air-cooled high-capacity thyristor power module, which belongs to the technical field of power semiconductor application and comprises a module frame, alternating crimping channels and insulating mounting grooves are arranged on the module frame, thyristor power components are fixed in the crimping channels and comprise a plurality of thyristors, crimping copper plates and radiators. The adjacent radiators are electrically connected through crimping copper plates, air cooling channels communicating the front sides and the rear sides of the crimping channels are arranged in the radiators, driving protection assemblies in the insulating mounting grooves are matched with the thyristors and the radiators on the upper end faces and the lower end faces of the thyristors in a one-to-one mode to drive and protect the thyristors, and loop connectors on the rear sides of the crimping channels are connected with thyristor power assemblies. A support arm is formed on each crimping channel through the thyristors connected in series, the support arms are matched with the loop connectors to form a three-phase full-control power bridge, the technical problems that a high-capacity power bridge is low in power density and large in installation space are effectively solved, and the three-phase full-control power bridge has the advantages of being high in power density, large in power capacity and small in installation space.

Description

Technical Field

[0001] The utility model belongs to the technical field of power semiconductor applications, and in particular relates to an air-cooled large-capacity thyristor power module. Background Art

[0002] Currently, the use of thyristors to build three-phase fully controlled power bridges is widely used in industrial power control, power electronic transmission, and other fields. For example, they can be used as rectifiers to convert AC power into DC power, or as power components in inverters to convert industrial frequency AC power into frequency-adjustable AC power. These are used in motor speed regulation, power regulation, and servo systems, offering numerous advantages such as high output current, smooth current flow, and high reliability. However, in high-power thyristor applications, a single power bridge is often required to output several megawatts or even tens of megawatts of power. To meet this high-power output requirement, it is necessary to achieve voltage and current boosting for the power devices and power bridges by connecting multiple thyristors in series or multiple fully controlled bridges in series and parallel, ultimately achieving the goal of increasing power output.

[0003] Given the high heat generated in high-power thyristor applications, strict requirements are placed on heat dissipation capabilities. In existing air-cooling technologies, to address the thermal challenges brought on by high currents, conventional design strategies tend to increase module size to ensure sufficient heat dissipation space, but this approach inevitably sacrifices power density. More commonly, a single three-phase fully controlled bridge is used as an independent module unit, each packaged into a cabinet, and then connected in series and parallel between multiple cabinets to achieve high power output requirements. However, this design approach has technical issues such as low power density and high on-site installation space requirements, which in turn increases the complexity of equipment operation and maintenance and increases costs.

[0004] Therefore, it is necessary to design a thyristor power module with a new structure to solve the above technical problems. Utility Model Content

[0005] The purpose of the present invention is to solve the above-mentioned problems existing in the prior art and to provide an air-cooled large-capacity thyristor power module, which effectively solves the technical problems of low power density and large installation space of large-capacity power bridges and meets the demand for high power output.

[0006] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0007] The utility model discloses an air-cooled large-capacity thyristor power module, comprising a module frame, wherein the module frame is provided with alternately arranged crimping channels and insulating mounting grooves, wherein any crimping channel is located between two insulating mounting grooves, and each crimping channel is provided with a thyristor power component, wherein the upper and lower ends of the thyristor power component are respectively fixed in the crimping channel by an adjustable butterfly crimping mechanism and a support member, and the thyristor power component comprises a plurality of thyristors, wherein the upper and lower surfaces of each thyristor are respectively fixed with a radiator, and the two radiators between adjacent thyristors are electrically connected by a crimping copper plate. The radiator is provided with an air-cooling channel connecting the front and rear sides of the crimping channel; multiple groups of driving protection components are evenly distributed in the insulating mounting groove, each group of driving protection components corresponds to a thyristor, and each group of driving protection components is connected to the radiators on the upper and lower sides of the corresponding thyristor through cables, and drives and protects the corresponding thyristor through the radiators on the upper and lower sides of the corresponding thyristor; a loop connector connected to the thyristor power component is installed on the rear side of each crimping channel, and a branch arm is formed on each crimping channel by the thyristors connected in series, and the branch arm cooperates with the loop connector to form a three-phase fully controlled power bridge.

[0008] Preferably, the module frame has an upper crossbeam and a lower crossbeam, the crimping channel and the insulation installation groove are located between the upper crossbeam and the lower crossbeam, and the notch of the insulation installation groove protrudes forward from the module frame.

[0009] Preferably, the adjustable butterfly crimping mechanism and the support are detachably fixed on the upper beam and the lower beam respectively, the adjustable butterfly crimping mechanism is connected to the uppermost radiator through a crimping copper plate, the support is connected to the lowermost radiator through a crimping copper plate, and the remaining crimping copper plates are respectively abutted between two adjacent radiators, and the radiator, thyristor and crimping copper plate form an I-shaped series pressure structure in the crimping channel through the adjustable butterfly crimping mechanism and the support; the thyristor and the radiator are connected by a pin shaft, and the radiator is fixed to two adjacent insulating mounting groove walls by a positioning member.

[0010] Preferably, there are multiple loop connectors on the rear side of each crimping channel, and each loop connector cooperates with at least two thyristors to form a three-phase fully controlled power bridge arm.

[0011] Preferably, the number of the crimping channels is three, and the number of thyristors connected in series on each crimping channel is eight.

[0012] Preferably, an air-cooled large-capacity thyristor power module of the present invention, by adjusting the installation position of the loop connector and changing the loop connection, the three-phase fully controlled power bridge includes the following three power circuits:

[0013] The first type: a fully controlled rectifier bridge with two thyristors in series on one arm and a fully controlled inverter bridge with two thyristors in series on one arm. The fully controlled rectifier bridge and the fully controlled inverter bridge are connected in series.

[0014] The second type: two independent arm fully controlled rectifier bridges or two independent arm fully controlled inverter bridges, two thyristors in each arm are connected in series, two sets of fully controlled rectifier bridges are connected in series or two sets of fully controlled inverter bridges are connected in series;

[0015] The third type: a group of four thyristors in a branch are connected in series to form an independent fully controlled rectifier bridge or an independent fully controlled inverter bridge.

[0016] Preferably, the specification range of the thyristor power module is: width ≤ 1450 mm, depth ≤ 500 mm, and height ≤ 1850 mm.

[0017] The advantages of adopting the utility model are:

[0018] 1. The thyristor power module described in the utility model, first of all, forms a modular structural design by alternately arranging crimping channels and insulating mounting grooves on the module frame, installing a thyristor power component on each crimping channel, and installing a drive protection component on the insulating mounting groove, which effectively reduces the device size, saves installation space, and significantly reduces the equipment cost.

[0019] Secondly, the structural design of installing the thyristor, crimping copper plate and heat sink on the crimping channel through the adjustable butterfly crimping mechanism and support parts enables the adjustable butterfly crimping mechanism to apply vertical pressure to the thyristor power component. At the same time, the force direction of the thyristor power component is constrained through the crimping channel, ensuring the reliable crimping and fixation of the entire thyristor power component, and realizing the crimping stability of the heat sink, thyristor and crimping copper plate.

[0020] Furthermore, the radiator is equipped with an air-cooling channel connecting the front and rear sides of the crimping channel, which effectively solves the technical problem of heat dissipation difficulties of large-capacity power bridges and significantly enhances the operational reliability of the thyristor power module. Compared with large-capacity water-cooled power bridges, it not only achieves the power capacity of water-cooled power bridges, but also makes maintenance easier. In addition, through the structural design of connecting the crimped copper plates between adjacent radiators, the radiator also acts as a conductor, and transmits electric energy by cooperating with the crimped copper plates as the power transmission medium. While ensuring the stability of the crimping of the entire bridge group, the electrical performance of the thyristor power module is optimized.

[0021] Finally, the utility model drives and protects the thyristor by cooperating with the driving protection component, the thyristor and the heat sink, ensuring the stability of the high voltage and high current output environment of the utility model and meeting the demand for high power output. At the same time, the thyristors connected in series on each crimping channel form a branch arm, and the branch arm cooperates with the loop connector to form a three-phase fully controlled power bridge, avoiding the single applicable structural form of the traditional thyristor power module, realizing the power bridge power loop connection in a variety of application scenarios, and greatly improving the application range and power density of the thyristor power module of the utility model.

[0022] According to actual tests conducted by the applicant, the maximum output power of the thyristor power module of the present invention exceeds 20MW, and the maximum rated current can reach 2000A while the maximum rated voltage reaches 8000V.

[0023] 2. In the present invention, the structural design of the upper and lower crossbeams within the module frame provides a solid support structure for the thyristor power module, making the entire thyristor power module more stable during operation and improving the reliability and service life of the thyristor power module; in addition, the notch of the insulating mounting groove protrudes forward from the module frame, so that the internal space of the thyristor power module is fully utilized, and more thyristors and drive protection components can be accommodated, thereby improving the power density of the thyristor power module.

[0024] 3. In the present invention, the heat sink, thyristor and crimping copper plate form an I-shaped series pressure structure in the crimping channel through an adjustable butterfly crimping mechanism and a support. Combined with the crimping copper plate abutting between two adjacent heat sinks, the thyristor and the heat sinks at the upper and lower end faces of the thyristor are connected by a pin shaft, and the heat sink is fixed on the walls of two adjacent insulating mounting grooves through a positioning member. This structural design not only achieves high modularity and ensures the high power density and compact installation space requirements of the thyristor power module, but also improves the reliability of the connection between the thyristor, the crimping copper plate and the heat sink in the crimping channel, thereby improving the overall stability of the thyristor power module.

[0025] 4. In the utility model, multiple loop connectors are arranged on the rear side of each crimping channel, and each loop connector cooperates with at least two thyristors to form a three-phase fully-controlled power bridge arm structure. Without changing the overall structure of the thyristor power module, flexible adaptation to various types of three-phase fully-controlled power bridge power circuits is achieved, avoiding the problem of the single applicable structural form, and improving the adaptability of the thyristor power module application scenarios. While ensuring that the thyristor power module has high power density and high power capacity performance, it also further saves installation space and improves the overall integration efficiency and practicality of the thyristor power module.

[0026] 5. In the present invention, by designing three crimping channels and designing the series installation of eight thyristors on each crimping channel, the entire thyristor power module realizes the installation of twenty-four thyristors, further meeting the demand for high-power output. Through the loop connection between the crimping channels, three-phase fully controlled power bridge power circuits of various structural forms can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0028] Figure 2 This is a rear view structural diagram of the utility model;

[0029] Figure 3 This is a schematic diagram of the main structure of the utility model;

[0030] Figure 4 This is a schematic diagram of the side view structure and air cooling direction of the utility model;

[0031] Figure 5 This is a functional diagram of the thyristor drive module in the utility model;

[0032] Figure 6 This is a schematic diagram of the main structure of the thyristor in the utility model in combination with the upper and lower heat sinks;

[0033] Figure 7 This is an electrical schematic diagram of the first application mode of the utility model;

[0034] Figure 8 This is an electrical schematic diagram of the second application mode of the utility model;

[0035] Figure 9 This is an electrical schematic diagram of the third application mode of the utility model.

[0036] The numbers in the figure are: 1. Thyristor power component, 2. Drive protection component, 3. Module frame, 4. Upper crossbeam, 5. Adjustable butterfly crimping mechanism, 6. Radiator, 61. Air cooling channel, 7. Thyristor, 8. Crimping copper plate, 9. Support, 10. Filter capacitor, 11. Protection resistor, 12. Thyristor drive module, 13. Crimping channel, 14. Loop connector, 15. Lower crossbeam, 16. Insulation mounting groove. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. For ease of description, the relative positional relationships of the various components are described based on the layout of the drawings in the specification. For example, the positional relationships of front, back, up, down, left, and right are determined based on the layout directions of the drawings in the specification.

[0038] Example 1

[0039] The utility model is an air-cooled large-capacity thyristor power module, such as Figure 1-3 As shown, the module frame 3 includes a crimping channel 13 and an insulating mounting groove 16 arranged alternately. Preferably, the insulating mounting groove 16 is detachably fixed in the module frame 3. Any crimping channel 13 is located between two insulating mounting grooves 16. Each crimping channel 13 is provided with a thyristor power component 1. Figure 2 Taking the direction shown as an example, the upper and lower ends of the thyristor power component 1 are fixed in the crimping channel 13 by the adjustable butterfly crimping mechanism 5 and the support 9 respectively. The design of the adjustable butterfly crimping mechanism 5 and the support 9 ensures the stable crimping installation of the thyristor power component 1 on the crimping channel 13.

[0040] The adjustable butterfly crimping mechanism 5 includes components such as crimping bolts, disc springs, upper insulating columns, crimping support copper plates, etc. that can realize the crimping adjustment function. Since the relevant components in the adjustable butterfly crimping mechanism 5 and their connection relationships are known technologies to technical personnel in this field, they will not be repeated here.

[0041] like Figure 2 and Figure 6 As shown, the thyristor power component 1 includes multiple thyristors 7, and a heat sink 6 is fixed on the upper and lower surfaces of each thyristor 7. The two heat sinks 6 between adjacent thyristors 7 are electrically connected by a crimped copper plate 8. The crimped copper plate 8 serves as a medium for power transmission, which not only ensures the contact area between adjacent heat sinks 6, but also realizes a close connection between the two heat sinks 6 through its structural design, ensuring the stability of the series voltage of the entire thyristor power component 1. At the same time, in addition to playing a heat dissipation role, the heat sink 6 also acts as a conductor for power transmission.

[0042] like Figure 6 As shown, the heat sink 6 is an aluminum rectangular parallelepiped, and is provided with an air cooling channel 61 connecting the front and rear sides of the crimping channel 13, thereby forming a Figure 4 The air circulation cooling structure shown, with air entering from the rear side and air exiting from the front side of the crimping channel 13 , realizes air cooling and heat dissipation of the entire thyristor power module.

[0043] like Figure 1 、 Figure 3As shown, multiple groups of driving protection components 2 are evenly distributed in the insulating mounting groove 16, each group of driving protection components 2 corresponds to a thyristor 7, and each group of driving protection components 2 is connected to the heat sink 6 on the upper and lower surfaces of the corresponding thyristor 7 through cables to achieve surge absorption and protection of the thyristor 7.

[0044] like Figure 4 、 Figure 7-9 As shown, a loop connector 14 connected to the thyristor power assembly 1 is installed on the rear side of each crimping channel 13. Specifically, loop connector 14 is preferably a soft loop connector made of laminated copper sheets. One end is crimped to the thyristor power assembly 1, and the other end serves as an external loop connection interface. Loop connector 14 can be flexibly adjusted in position and installation length according to different power loop connection designs to ensure reliable and convenient connection. Furthermore, each crimping channel 13 forms a branch arm through the series connection of thyristors 7. The branch arm and loop connector 14 cooperate to form a three-phase fully controlled power bridge, thereby outputting high voltage and high current to external devices.

[0045] Each group of driving protection components 2 includes a filter capacitor 10, a protective resistor 11 and a thyristor driving module 12. The thyristor driving module 12 is connected to the external control device by optical fiber. Preferably, the filter capacitor 10 is a metallized polypropylene film capacitor with an aluminum shell, and the protective resistor 11 is an aluminum shell resistor. Specifically, the filter capacitor 10, the protective resistor 11 and the thyristor driving module 12 in each group of driving protection components 2 correspond to a thyristor 7 together. The filter capacitor 10 is horizontally installed in the insulating mounting groove 16 on one side of the crimping channel 13, and the filter capacitor 10 in each group of driving protection components 2 is arranged vertically; the thyristor driving module 12 is installed in the insulating mounting groove 16 on the other side of the crimping channel 13, and the thyristor driving module 12 in each group of driving protection components 2 is arranged vertically; the protective resistor 11 is arranged in the crimping channel 13 and is located in front of the radiator 6, and the protective resistor 11 in each group of driving protection components 2 is symmetrically installed on the wall of the adjacent insulating mounting groove 16.

[0046] The filter capacitor 10, the protective resistor 11 and the thyristor drive module 12 in each group of the driving protection component 2 are connected in series, and the thyristor drive module 12 is connected to the corresponding thyristor 7 and the heat sinks 6 on the upper and lower sides of the corresponding thyristor 7 through cables. Since the specific connection principle between the filter capacitor 10, the protective resistor 11, the thyristor drive module 12, the corresponding thyristor 7 and the heat sinks 6 on the upper and lower sides of the corresponding thyristor 7 belongs to the technology known to those skilled in the art, it will not be repeated here. In addition, the thyristor drive module 12 has no low-voltage control power supply access and is suitable for special high-voltage operating environments. At the same time, the transmission method of the drive signal of the thyristor 7 adopts optical transmission, and the transmission reliability is high. For example Figure 5The functional diagram of the thyristor driving module 12 is as follows. The thyristor driving module 12 integrates the functions of the high-voltage self-energy circuit, the pulse triggering circuit, the overvoltage protection circuit and the optical fiber communication circuit. Its control and protection functions are perfect, and can realize the driving and protection of the corresponding thyristor 7. Among them, the high-voltage self-energy circuit can obtain the pulse triggering power supply to ensure the physical isolation of the high and low voltage power supply systems, and the operation is safer. It should be noted that the connection relationship between the high-voltage self-energy circuit, the pulse triggering circuit, the overvoltage protection circuit and the optical fiber communication circuit, as well as the connection relationship between each circuit and the corresponding thyristor 7, are all known technologies and will not be repeated here.

[0047] like Figure 1-3 As shown, the module frame 3 includes an upper crossbeam 4 and a lower crossbeam 15. The crimping channel 13 and the insulating mounting groove 16 are located between the upper crossbeam 4 and the lower crossbeam 15. The notch of the insulating mounting groove 16 protrudes forward from the module frame 3. Preferably, to ensure the stability of the thyristor power module of the present invention, the upper crossbeam 4 and the lower crossbeam 15 can be made of steel.

[0048] Furthermore, the adjustable butterfly pressing mechanism 5 and the support member 9 are detachably fixed on the upper crossbeam 4 and the lower crossbeam 15 respectively. The adjustable butterfly pressing mechanism 5 is connected to the uppermost radiator 6 through a pressing copper plate 8, and the support member 9 is connected to the lowermost radiator 6 through a pressing copper plate 8. The remaining pressing copper plates 8 are respectively abutted between the two adjacent radiators 6. Thus, the adjustable butterfly pressing mechanism 5 cooperates with the support member 9 to apply pressure to the thyristor power component 1 and presses the thyristor power component 1 through the pressing channel 13. The force direction of the thyristor power component 1 is constrained so that the heat sink 6, the thyristor 7 and the crimping copper plate 8 form a stable I-shaped series pressure structure in the crimping channel 13 through the adjustable butterfly crimping mechanism 5 and the support 9; concentric positioning holes are respectively provided in the centers of the heat sink 6 and the thyristor 7, and positioning pins are installed in the concentric positioning holes. The thyristor 7 and the heat sink 6 are connected by a pin shaft and are crimped tightly to each other, and the heat sink 6 is fixed to the walls of two adjacent insulating mounting grooves 16 through positioning pieces.

[0049] Furthermore, if Figure 4 、 Figure 7-9 As shown, there are multiple loop connectors 14 on the rear side of each crimping channel 13. Each loop connector 14 cooperates with at least two thyristors 7 to form a three-phase fully controlled power bridge arm. Each arm can be connected to the copper busbar through a loop connector 14.

[0050] Example 2

[0051] Based on Example 1, this embodiment further illustrates the flexibility of the application scenarios of the thyristor power module. Multiple loop connectors 14 can be fixed at different positions on the rear side of the crimping channel 13, respectively. By adjusting the installation position of the loop connector 14 and changing the loop connection, and cooperating with the thyristor power component 1, the connection and function of different application modes of the three-phase fully controlled power bridge can be realized. Specifically, the number of crimping channels 13 is three, and the number of thyristors 7 in series on each crimping channel 13 is eight, that is, the entire thyristor power module can meet the parallel installation of three groups of thyristor power components 1, thereby realizing the installation of twenty-four thyristors 7. The specification range of the thyristor power module is: width ≤1450mm, depth ≤500mm, height ≤1850mm. It supports overall installation, and can be directly installed in the electrical equipment cabinet, and is also suitable for installation requirements on containers or fixed brackets.

[0052] The following lists the power circuits of three application modes of three-phase fully controlled power bridge:

[0053] The first application method:

[0054] A fully controlled rectifier bridge with two thyristors 7 connected in series on one arm and a fully controlled inverter bridge with two thyristors 7 connected in series on one arm, the fully controlled rectifier bridge and the fully controlled inverter bridge are connected in series. Figure 7 The figure shows an electrical schematic diagram of the power circuit connection for a set of three-phase fully-controlled rectifier bridges and a set of three-phase fully-controlled inverter bridges installed in parallel. Each crimping channel 13 has five circuit connectors 14 crimped to the thyristor power assembly 1 on the rear side. An arm is positioned between two adjacent circuit connectors 14, each of which is connected in series with two thyristors 7. A, B, and C are AC input terminals, U, V, and W are AC output terminals, and L1 and L2 are DC circuit connection terminals. The three AC input terminals A, B, and C, the three AC output terminals U, V, and W, and the DC circuit connection terminals L1 and L2 are connected to the corresponding circuit connectors 14 to form the operating circuit of this application. The DC circuit connection terminals L1 and L2 are connected to external devices.

[0055] This power circuit connection structure can be applied to the power components of the inverter, and the industrial frequency AC power supply is converted into frequency-adjustable AC power supply through the rectifier bridge and inverter bridge of this module.

[0056] The second application method:

[0057] Two independent arm fully controlled rectifier bridges or two independent arm fully controlled inverter bridges, two thyristors 7 in each arm are connected in series, two groups of fully controlled rectifier bridges are connected in series or two groups of fully controlled inverter bridges are connected in series. Figure 8The figure shows an electrical schematic diagram of the power circuit connection for two sets of three-phase fully controlled power bridges installed in parallel. Each crimping channel 13 has five circuit connectors 14 crimped to the thyristor power assembly 1 on the rear side, with arms positioned between two adjacent circuit connectors 14. A1, B1, and C1 are the AC input terminals of rectifier bridge one, A2, B2, and C2 are the AC input terminals of rectifier bridge two, and L1 and L2 are the DC circuit connection terminals. AC input terminals A1, B1, C1, A2, B2, and C2, as well as DC circuit connection terminals L1 and L2, are connected to the corresponding circuit connectors 14. Rectifier bridges one and two are connected in series to form the operating circuit for this application. DC circuit connection terminals L1 and L2 are connected to external devices.

[0058] This power circuit connection structure can be applied to high-power 12-pulse rectifier power supplies, and the industrial frequency AC power supply can be rectified into a smooth DC power supply through this module.

[0059] The third application method:

[0060] A group of four thyristors 7 connected in series form an independent fully controlled rectifier bridge or an independent fully controlled inverter bridge. Figure 9 The figure shows an electrical schematic diagram of the power circuit connection for a three-phase fully controlled rectifier bridge. Each crimping channel 13 has three circuit connectors 14 crimped to the thyristor power assembly 1 on its rear side. A branch arm is positioned between two adjacent circuit connectors 14, connecting four thyristors 7 in series. A, B, and C serve as AC input terminals, and L1 and L2 serve as DC circuit connections. The three AC input terminals A, B, and C, as well as the DC circuit connections L1 and L2, are connected to the corresponding circuit connectors 14, forming the operating circuit for this application. The DC circuit connections L1 and L2 are connected to external devices.

[0061] This power circuit connection structure can be applied to high-power six-pulse rectifier power supplies, which can be used to rectify industrial frequency AC power into smooth DC power. It can also be applied to high-power six-pulse inverter power supplies, which can be used to invert DC power into AC power.

[0062] The above description is only a specific embodiment of the present invention. Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes; all disclosed features, or all steps in the methods or processes, except for mutually exclusive features and / or steps, can be combined in any way.

Claims

1. An air-cooled large-capacity thyristor power module, characterized by: The invention comprises a module frame (3), wherein the module frame (3) is provided with alternately arranged crimping channels (13) and insulating mounting grooves (16), wherein any crimping channel (13) is located between two insulating mounting grooves (16), and each crimping channel (13) is provided with a thyristor power component (1), wherein the upper end and the lower end of the thyristor power component (1) are fixed in the crimping channel (13) by an adjustable butterfly crimping mechanism (5) and a support member (9), respectively, and the thyristor power component (1) comprises a plurality of thyristors (7), wherein a heat sink (6) is fixed on the upper and lower surfaces of each thyristor (7), respectively, and the two heat sinks (6) between adjacent thyristors (7) are electrically connected by a crimping copper plate (8), and an air cooling channel (61) is provided in the heat sink (6) for connecting the front side and the rear side of the crimping channel (13); Multiple groups of driving protection components (2) are evenly distributed in the insulating installation groove (16), each group of driving protection components (2) corresponds to a thyristor (7), each group of driving protection components (2) is connected to the heat sinks (6) on the upper and lower sides of the corresponding thyristor (7) through a cable, and drives and protects the corresponding thyristor (7) through the heat sinks (6) on the upper and lower sides of the corresponding thyristor (7); a loop connector (14) connected to the thyristor power component (1) is installed on the rear side of each crimping channel (13), and a support arm is formed on each crimping channel (13) by the thyristors (7) connected in series, and the support arm cooperates with the loop connector (14) to form a three-phase fully controlled power bridge.

2. The air-cooled large-capacity thyristor power module according to claim 1, characterized in that: The module frame (3) has an upper crossbeam (4) and a lower crossbeam (15), the crimping channel (13) and the insulating mounting groove (16) are located between the upper crossbeam (4) and the lower crossbeam (15), and the notch of the insulating mounting groove (16) protrudes forward from the module frame (3).

3. The air-cooled large-capacity thyristor power module according to claim 2, characterized in that: The adjustable butterfly-shaped pressing mechanism (5) and the support member (9) are detachably fixed on the upper crossbeam (4) and the lower crossbeam (15), respectively. The adjustable butterfly-shaped pressing mechanism (5) is connected to the uppermost radiator (6) through a pressing copper plate (8), and the support member (9) is connected to the lowermost radiator (6) through a pressing copper plate (8). The remaining pressing copper plates (8) are respectively abutted between two adjacent radiators (6). The radiator (6), the thyristor (7) and the pressing copper plate (8) form an I-shaped series pressing structure in the pressing channel (13) through the adjustable butterfly-shaped pressing mechanism (5) and the support member (9); the thyristor (7) and the radiator (6) are connected through a pin shaft, and the radiator (6) is fixed to the groove walls of two adjacent insulating mounting grooves (16) through a positioning member.

4. The air-cooled large-capacity thyristor power module according to claim 3, characterized in that: There are multiple loop connectors (14) on the rear side of each crimping channel (13), and each loop connector (14) cooperates with at least two thyristors (7) to form a three-phase fully controlled power bridge arm.

5. The air-cooled large-capacity thyristor power module according to claim 4, characterized in that: The number of the crimping channels (13) is three, and the number of thyristors (7) connected in series on each crimping channel (13) is eight.

6. The air-cooled large-capacity thyristor power module according to claim 5, characterized in that: By adjusting the installation position of the loop connector (14) and changing the loop connection, the three-phase fully controlled power bridge includes the following three power loops: The first type: a fully controlled rectifier bridge with two thyristors (7) connected in series in one arm and a fully controlled inverter bridge with two thyristors (7) connected in series in one arm, wherein the fully controlled rectifier bridge and the fully controlled inverter bridge are connected in series; The second type: two independent arm-based fully controlled rectifier bridges or two independent arm-based fully controlled inverter bridges, two thyristors (7) in each arm are connected in series, two groups of fully controlled rectifier bridges are connected in series, or two groups of fully controlled inverter bridges are connected in series; The third type: a group of four thyristors (7) in a branch are connected in series to form an independent fully controlled rectifier bridge or an independent fully controlled inverter bridge.

7. The air-cooled large-capacity thyristor power module according to claim 6, characterized in that: The specification range of the thyristor power module is: width ≤ 1450 mm, depth ≤ 500 mm, and height ≤ 1850 mm.

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