A plug-and-play connection structure, a gate driver board, and a turn-off thyristor device

Abstract

The present application provides a plug-and-play connection structure, a gate driver board, and a turn-off thyristor device. The plug-and-play connection structure is provided as an electrode elastic connection structure, and the plug-and-play connection structure is used to realize the connection between the housing connection board of the turn-off thyristor device and the gate driver board; the plug-and-play connection structure includes a first plug-and-play end and a second plug-and-play end that are elastically connected to each other in electrodes. The gate driver board includes a second functional area and a second interface area, and the aforementioned first plug-and-play end or second plug-and-play end is provided in the second interface area. The turn-off thyristor device includes a housing connection board and a gate driver board, and the housing connection board and the gate driver board are connected using the aforementioned plug-and-play connection structure. The present application relates to the technical field of semiconductor devices, and can effectively improve the connection structure form between the gate driver board and the housing connection board, improve the system integration degree and reliability, and reduce the maintenance cost and operation difficulty.

Description

Technical Field

[0001] This application relates to the technical field of semiconductor devices, and particularly to a plug-and-play connection structure, a gate drive board, and a turn-off thyristor device. Background Art

[0002] The turn-off thyristor is a new type of high-voltage and high-capacity power semiconductor device, which has high breakdown voltage, low conduction voltage drop, strong current-carrying capacity, and mature series connection technology, and has important applications in the field of power electronics.

[0003] The IGCT (Integrated Gate-Commutated Thyristor) device realizes hard turn-off through gate commutation. Its electrical topology is as Figure 1 shown, including a turn-off thyristor device and a drive circuit. The drive circuit is connected in parallel between the gate G and the cathode K of the turn-off thyristor device. The drive circuit includes a turn-off module, a turn-on module, and a maintenance module, and each module is connected in parallel. Both the turn-on module and the maintenance module are composed of a switching switch and a current source connected in series. When the turn-off thyristor device is turned on, the switching switch of the turn-on module turns on the current source and injects a high-amplitude steep-wave strong trigger current into the gate G of the turn-off thyristor to ensure uniform conduction of the turn-off thyristor. Subsequently, the switching switch of the turn-on module disconnects, and the switching switch of the maintenance module turns on the current source to inject a constant-amplitude maintenance current into the gate G of the turn-off thyristor to prevent the turn-off state from being restored due to insufficient anode current. The turn-off module is composed of a switching switch and a turn-off capacitor bank connected in series, and the turn-off capacitor bank is pre-charged with a negative voltage. When the turn-off thyristor device is turned off, the switching switch of the turn-off module turns on the turn-off capacitor bank, and all the current of the cathode K is transferred to the gate G, flows out from the cathode K after passing through the turn-off capacitor bank. This turn-off commutation process has strict time limits. If the limit is exceeded, the turn-off thyristor device cannot achieve hard turn-off, resulting in failure breakdown and presenting an uncontrolled short-circuit state.

[0004] The ETO (Emitter Turn-Off Thyristor) device realizes hard turn-off through cathode blocking and gate commutation. The physical form of its drive circuit is similar to that of the IGCT, but the ETO drive circuit adds a second set of turn-off modules on the cathode side of the turn-off thyristor device's housing package, and the turn-off module only includes a switching switch. This design further simplifies the drive circuit and improves the reliability of the turn-off process.

[0005] During the above-mentioned turn-off commutation process, the time is proportional to the loop stray inductance of the turn-off module. To restrict the duration of the turn-off commutation process and reduce the loop stray inductance of the turn-off module, the physical structure of the drive circuit and the housing package of the turn-off thyristor device are tightly connected by a large number of screws. Therefore, in actual use, when the turn-off thyristor cannot operate normally due to drive circuit failure, it is usually necessary to replace the turn-off thyristor device as a whole, increasing the maintenance cost.

[0006] For example, Chinese Patent CN115621233B discloses a housing structure for fully controlled power electronic devices, including an accessory interface board, a gate drive board, and a connection structure. The drive circuit functional module is located on the gate drive board. The accessory interface board is connected to the housing package of the turn-off thyristor device, and the accessory interface board and the gate drive board are rigidly connected by fasteners and screws. However, in the case of multiple turn-off thyristor devices connected in series, the tool operation space is narrow, resulting in difficulties in assembling and disassembling the connection structure, increasing the operation and maintenance time and cost. In addition, the connection stability depends on multiple screws and fasteners, which are vulnerable to mechanical stress, reducing the system reliability. The complexity of the overall structure increases the difficulty of manufacturing and assembly, with insufficient integration, high operation and maintenance costs, and complex replacement.

[0007] For another example, Chinese Patent CN111900136B discloses a turn-off thyristor device with a separated gate drive, as Figure 2 shown, including a turn-off thyristor housing 11, an accessory interface board 12, a gate drive board 13, and a rigid connection structure 14. The turn-off thyristor housing 11 and the accessory interface board 12 are connected in a low-inductance integrated manner. The gate drive board 13 includes a drive circuit module 131, and the accessory interface board 12 and the gate drive board 13 are detachably connected through the connection structure. The connection structure includes screws and nuts, which are connected through the connection holes on the accessory interface board 12 and the gate drive board 13. Although modular and detachable connection is achieved, the operation is cumbersome, the installation time of screws and nuts is long, and the maintenance process is complex. A large number of screws and nuts also make the overall connection stability vulnerable to vibration and mechanical shock, reducing the system reliability. This design still has insufficient integration, high operation and maintenance costs, complex replacement, and increases the difficulty of manufacturing and assembly.

[0008] For another example, Chinese Patent Application CN114040568A discloses an IGCT, which splits the traditional drive unit circuit board into an interface board and a drive board. The interface board and the shielding cover are in press-fit cooperation, and the drive board is detachably connected to the interface board and the shielding cover. This design allows the drive board to be replaced regularly without unsealing the press-fit structure. However, the connection structure is complex, the shielding cover design increases the manufacturing and assembly difficulty, the connection part is relatively large in volume, and it still takes a long time to replace the drive board. Such a complex connection method results in insufficient integration and compactness of the system, while increasing the manufacturing and operation and maintenance costs. The connection stability and overall reliability are limited by the complex mechanical structure, increasing the operation complexity and maintenance cost.

[0009] In summary, the split turn-off thyristor devices in the prior art have significant deficiencies in terms of connection complexity, connection stability, integration, operation and maintenance costs, and replacement complexity. Therefore, it is necessary to develop a new technical solution to improve these aspects and enhance the reliability and maintenance efficiency of the system. Summary of the Invention

[0010] In view of this, the present application provides a plug-and-play connection structure, a gate drive board, and a turn-off thyristor device, aiming to at least partially solve the above technical problems.

[0011] On the one hand, the present application provides a plug-and-play connection structure for a turn-off thyristor device.

[0012] The plug-and-play connection structure is set as an electrode elastic connection structure, and is used to realize the connection between the housing connection board of the turn-off thyristor device and the gate drive board.

[0013] The plug-and-play connection structure includes a first plug-and-play end and a second plug-and-play end that are elastically connected to each other at the electrodes. The first plug-and-play end and the second plug-and-play end are separately arranged. One of the first plug-and-play end and the second plug-and-play end is integrally arranged on the gate drive board, and the other is integrally arranged on the housing connection board.

[0014] Both the first plug-and-play end and the second plug-and-play end include at least two electrodes. The first plug-and-play end is set as a layered stacked electrode group, and the second plug-and-play end is set as an electrode insertion slot that cooperates with the electrode group. The electrode insertion slot is formed by oppositely arranged electrodes, and an internal accommodation space for accommodating the electrode group is provided in the electrode insertion slot.

[0015] The above plug-and-play connection structure may also have the following characteristics.

[0016] The insertion and extraction direction of the electrode group in the electrode insertion slot is set as the first direction.

[0017] The entrance of the groove body of the electrode insertion groove is open, and the distance between the oppositely arranged electrodes at the entrance of the groove body is greater than the thickness value of the electrode group; the middle position of the electrode insertion groove along the first direction is constricted, and the distance between the oppositely arranged electrodes at the middle position of the electrode insertion groove is less than the thickness value of the electrode group.

[0018] The above plug-in connection structure may also have the following characteristics:

[0019] Elastic protrusions are provided on the inner surface of the electrode insertion groove or the outer surface of the electrode group, and the elastic protrusions are used to achieve elastic clamping connection between the electrode group and the electrode insertion groove.

[0020] The above plug-in connection structure may also have the following characteristics:

[0021] The elastic protrusion and the electrode insertion groove are of an integrally formed structure, and the elastic protrusion includes any one or more of the following: a strip-shaped protrusion formed by bending, a columnar protrusion formed by stamping, and a spring piece formed by stamping.

[0022] The above plug-in connection structure may also have the following characteristics:

[0023] The elastic protrusion and the electrode insertion groove are of a split connection structure, and the elastic protrusion includes any one or more of the following: a strip-shaped protrusion connected by welding, a columnar protrusion connected by welding, and a spring piece connected by welding.

[0024] The above plug-in connection structure may also have the following characteristics:

[0025] The plug-in connection structure is also provided with a locking buckle;

[0026] The locking buckle includes a buckle and a buckle fixing groove that are cooperatively arranged. The buckle is integrally arranged on the electrode insertion groove, and the buckle fixing groove is integrally arranged on the electrode group or on the circuit board provided with the electrode group.

[0027] The above plug-in connection structure may also have the following characteristics:

[0028] The electrode insertion groove is welded to a housing, and the housing surrounds the electrode insertion groove;

[0029] The buckle is arranged on the housing, and a fixed shaft is arranged on the housing. The buckle is provided with a mounting hole or mounting groove that matches the fixed shaft, and the buckle is rotatably connected to the fixed shaft through the mounting hole or mounting groove;

[0030] The buckle fixing groove is set as a buckle fixing groove formed by a milling process.

[0031] On the other hand, the present application also provides a gate driver board, which includes a second functional area provided with a drive circuit module and a second interface area for connecting electrodes.

[0032] The second interface area is provided with the aforementioned first plug-in end or second plug-in end, and the first plug-in end or the second plug-in end is used to achieve elastic connection of the electrodes between the case connection board of the turn-off thyristor device and the gate driver board.

[0033] The above-mentioned gate driver board may also have the following characteristics.

[0034] The first plug-in end or second plug-in end provided in the second interface area is provided with two electrodes.

[0035] One of the two electrodes is connected to the gate output port of the second functional area, and the other is connected to the cathode output port of the second functional area.

[0036] The above-mentioned gate driver board may also have the following characteristics.

[0037] The first plug-in end or second plug-in end provided in the second interface area is provided with at least three electrodes.

[0038] One of the at least three electrodes is connected to the gate output port of the second functional area, the second is connected to the cathode output port of the second functional area, and the remainder is connected to the sampling circuit of the second functional area.

[0039] On the other hand, the present application also provides a turn-off thyristor device, which includes a case connection board and a gate driver board, and the case connection board and the gate driver board are connected using the aforementioned plug-in connection structure.

[0040] The above-mentioned turn-off thyristor device may also have the following characteristics.

[0041] The case connection board is integrally provided on the case package of the turn-off thyristor device. The case connection board is provided with a first interface area and a first functional area, and the first interface area is provided with the first plug-in end or second plug-in end.

[0042] The above-mentioned turn-off thyristor device may also have the following characteristics.

[0043] The first plug-in end or second plug-in end provided in the first interface area is provided with two electrodes.

[0044] One of the two electrodes is connected to the gate output port of the first functional area, and the other is connected to the cathode output port of the first functional area.

[0045] The above-mentioned turn-off thyristor device may also have the following characteristics.

[0046] The shell connecting plate is also provided with a wiring terminal for connecting an external circuit electrode;

[0047] Three electrodes are provided on the first plug-in end or the second plug-in end arranged in the first interface area;

[0048] One of the three electrodes is connected to the gate output port of the first functional area, the second is connected to the cathode output port of the first functional area, and the third is connected to the wiring terminal of the first functional area.

[0049] The above-mentioned turn-off thyristor device may also have the following characteristics

[0050] Four electrodes are provided on the first plug-in end or the second plug-in end arranged in the first interface area;

[0051] One of the four electrodes is connected to the current power port of the gate of the first functional area, the second is connected to the current signal port of the gate of the first functional area, the third is connected to the current power port of the cathode of the first functional area, and the fourth is connected to the current signal port of the cathode of the first functional area.

[0052] It can be seen that, compared with the existing related technologies, by setting the electrode elastic connection structure in this application, the connection form between the gate drive board and the shell connecting plate can be effectively improved. This structure can not only simplify the installation and disassembly process, but also improve the system integration and reliability, and at the same time significantly reduce the maintenance cost and operation difficulty.

[0053] Other features and advantages of this application will be described in the subsequent specification, and, in part, will be obvious from the specification, or will be understood by implementing this application. Other advantages of this application can be realized and obtained through the solutions described in the specification and the drawings. Description of the Drawings

[0054] The drawings are used to provide an understanding of the technical solutions of this application, and constitute a part of the specification. Together with the embodiments of this application, they are used to explain the technical solutions of this application and do not constitute a limitation to the technical solutions of this application.

[0055] Figure 1 It is a schematic diagram of the electrical structure of a gate-commutated turn-off thyristor device and a drive circuit in the prior art;

[0056] Figure 2 It is a schematic diagram of a separated gate drive structure disclosed in the prior art CN111900136B;

[0057] Figure 3 It is a schematic diagram of a split-type pluggable gate drive structure according to an embodiment of this application;

[0058] Figure 4Schematic diagram of the gate drive board structure according to an embodiment of the present application;

[0059] Figure 5 Schematic diagram of the shell connection board structure according to an embodiment of the present application;

[0060] Figure 6 Schematic diagram of the second plug-in end structure according to an embodiment of the present application;

[0061] Figure 7 Schematic diagram of the shell connection board structure according to another embodiment of the present application;

[0062] Figure 8 Schematic diagram of the gate drive board structure according to another embodiment of the present application;

[0063] Figure 9 Schematic diagram of the shell connection board structure according to yet another embodiment of the present application;

[0064] Figure 10 Schematic diagram of the second plug-in end structure according to yet another embodiment of the present application;

[0065] Figure 11 Schematic diagram of the gate drive board structure according to yet another embodiment of the present application;

[0066] Figure 12 Schematic diagram of the shell connection board structure according to another embodiment of the present application;

[0067] Figure 13 Schematic diagram of the second plug-in end structure according to another embodiment of the present application;

[0068] Figure 14 Schematic diagram of the gate drive board structure according to another embodiment of the present application;

[0069] Illustration of the prior art CN111900136B:

[0070] 11 - Turn-off thyristor shell, 12 - Auxiliary interface board, 13 - Gate drive board, 14 - Rigid connection structure, 131 - Drive circuit module;

[0071] Illustration of the present application:

[0072] 1 - Turn - off thyristor, 2 - Housing connection plate, 21 - First functional area, 22 - First interface area, 23 - Terminal, 221 - First upper electrode, 222 - First lower electrode, 223 - Housing, 224 - Buckle, 225 - First left separation electrode, 226 - First right separation electrode, 3 - Gate drive board, 31 - Second functional area, 32 - Second interface area, 321 - Second upper electrode, 322 - Second lower electrode, 323 - Buckle fixing groove, 324 - Second left separation electrode, 325 - Second right separation electrode. Detailed implementation

[0073] This application describes multiple embodiments, but the description is exemplary rather than restrictive, and it will be obvious to those of ordinary skill in the art that there can be more embodiments and implementation solutions within the scope of the embodiments described in this application. Although many possible feature combinations are shown in the drawings and discussed in the detailed implementation, many other combination ways of the disclosed features are also possible. Unless specifically restricted, any feature or element of any embodiment can be combined with any other feature or element in any other embodiment, or can replace any other feature or element in any other embodiment.

[0074] This application includes and contemplates combinations with features and elements known to those of ordinary skill in the art. The embodiments, features, and elements already disclosed in this application can also be combined with any conventional features or elements to form unique invention solutions defined by the claims. Any feature or element of any embodiment can also be combined with features or elements from other invention solutions to form another unique invention solution defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in this application can be implemented alone or in any appropriate combination. Therefore, except for the limitations made according to the appended claims and their equivalents, the embodiments are not subject to other limitations. In addition, various modifications and changes can be made within the scope of the appended claims.

[0075] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not depend on the specific order of the steps described herein, the method or process should not be limited to the specific order of steps described. As will be understood by those of ordinary skill in the art, other step sequences are possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation on the claims. In addition, the claims directed to the method and / or process should not be limited to performing their steps in the order written, and those skilled in the art can easily understand that these orders can be varied and still remain within the spirit and scope of the embodiments of this application.

[0076] An exemplary embodiment provides a pluggable connection structure for a turn-off thyristor device, which is set as an electrode elastic connection structure; the pluggable connection structure includes a first pluggable end and a second pluggable end that are elastically connected to each other's electrodes, and the first pluggable end and the second pluggable end are separately arranged. As Figure 3 shown, this pluggable connection structure can be used to realize the connection between the housing connection board 2 and the gate drive board 3 of the turn-off thyristor device 1. The housing connection board 2 is provided with a first functional area 21 and a first interface area 22, and the gate drive board 3 is provided with a second functional area 31 and a second interface area 32.

[0077] Combined with Figures 4 - 5 shown, both the first pluggable end and the second pluggable end include at least two electrodes; the first pluggable end is integrally arranged on the gate drive board 3 and adopts a layered stacked electrode group structure to ensure multi-point contact. The second pluggable end is integrally arranged on the housing connection board 2 and is designed as an electrode insertion slot that matches the electrode group of the first pluggable end. The electrode insertion slot is formed by bending the relatively arranged electrodes, and an internal accommodation space for accommodating the electrode group is arranged in the electrode insertion slot; through the precise positioning and guidance of the insertion slot, the efficient insertion of the electrode group and the electrode insertion slot is realized. The electrode group can be made of a highly conductive elastic metal material or can be set through a specific geometric shape structure to provide the required elastic pressure to ensure the stability and reliability of the electrical connection, and at the same time absorb the mechanical stress during the plugging and unplugging process through elastic deformation. This structure simplifies the installation and disassembly process of the turn-off thyristor device, improves the system integration degree, and reduces the electrical faults caused by poor connection.

[0078] In the above embodiment provided by the present application, through the setting of the above electrode elastic connection structure, the deficiencies in connection complexity, connection stability, integration degree, operation and maintenance cost, and replacement complexity existing in the prior art are effectively improved. This design not only ensures the high reliability and stability of the electrical connection, but also simplifies the installation and maintenance operations, and improves the performance and reliability of the overall system.

[0079] Combined with Figures 5 - 6 shown, in the pluggable connection structure in an exemplary embodiment, the plugging and unplugging direction of the electrode group in the electrode insertion slot is set as the first direction; the entrance of the slot body of the electrode insertion slot is open, and the distance between the relatively arranged electrodes at the entrance of the slot body is greater than the thickness value of the electrode group; the middle position of the electrode insertion slot along the first direction is in a constricted shape, and the distance between the relatively arranged electrodes at the middle position of the electrode insertion slot is less than the thickness value of the electrode group.

[0080] In specific operations, the first interface area 22 of the above-mentioned shell connection plate 2 is provided with a first upper electrode 221 and a first lower electrode 222. By arranging the first upper electrode 221 and the first lower electrode 222 at intervals and performing corresponding electrode bending operations, an electrode insertion slot with this special shape is formed; the first upper electrode 221 and the first lower electrode 222 can be formed by stamping copper sheets to ensure good stability; the ends of the first upper electrode 221 and the first lower electrode 222 close to the first functional area 21 can be set in a straight plate shape to ensure the stable connection between the first upper electrode 221 and the first lower electrode 222 and the PCB where the first functional area 21 is located; the other ends of the first upper electrode 221 and the first lower electrode 222, that is, the slot entrance of the electrode insertion slot, can be set in a curved plate shape, or a corrugated plate shape, or a bent plate shape to ensure the elastic compression after the electrode group is inserted into the electrode insertion slot.

[0081] In the above embodiment provided by the present application, the distance between the oppositely arranged electrodes at the slot entrance of the slot body is greater than the thickness of the electrode group to ensure the guiding and positioning during insertion; that is, the distance between the outer edges of the first upper electrode 221 and the first lower electrode 222 is greater than the thickness value of the electrode group to be inserted. The distance between the oppositely arranged electrodes at the middle position of the electrode insertion slot along the first direction is less than the thickness value of the electrode group to ensure the elastic connection of the electrodes after insertion; that is, the minimum gap between the middle of the first upper electrode 221 and the bent part of the first lower electrode 222 is less than the thickness value of the electrode group to be inserted; through this size difference, the elastic compression and reliable connection of the electrodes are achieved, and the technical effect of improving the elastic pressure after the electrode group is inserted into the electrode insertion slot is ensured. In addition, both the electrode group and the electrode insertion slot can be made of highly conductive elastic metal materials to ensure absorbing mechanical stress during the plugging and unplugging process, reducing the contact resistance, and maintaining a stable electrical connection. Due to the specific shape design of the electrode insertion slot, excellent elastic connection of the electrodes can be achieved without additional components, and the entire structure is easy to be integrally formed and integrated. This design simplifies the installation and disassembly process, and improves the integration degree and maintenance efficiency of the system.

[0082] In the above embodiment provided by the present application, through the specific shape setting of the electrode insertion slot, efficient and reliable elastic connection of the electrodes is achieved, the use of additional components is avoided, the structure is simplified, and it is easy to manufacture and integrate. This structure not only improves the connection stability and system reliability, but also reduces the manufacturing and operation and maintenance costs, and significantly improves the performance and application flexibility of the overall system.

[0083] In a plug - and - play connection structure in an exemplary embodiment, elastic protrusions (not shown in the figure) are provided on the inner surface of the electrode insertion slot or the outer surface of the electrode group to achieve elastic clamping connection between the electrode group and the electrode insertion slot. The elastic protrusions can be of various different forms to meet the elastic force required for elastic connection of electrodes in different application scenarios. The specific forms can include any one or more of the following: strip - shaped protrusions formed by bending, columnar protrusions formed by stamping, and elastic pieces formed by stamping. These elastic protrusions and the electrode insertion slot or the electrode group are of an integrally - formed structure, and through advanced manufacturing processes, such as precision die - forming technology, high - precision and high - consistency structure manufacturing is achieved. This design ensures that during the plug - and - play process, the elastic protrusions can provide sufficient elastic force to achieve reliable electrical connection, while simplifying the structure, reducing the number of components, and lowering the manufacturing and assembly costs.

[0084] In the above - mentioned embodiment provided by the present application, through the application of the above - mentioned elastic protrusions, elastic clamping connection between the electrode group and the electrode insertion slot is effectively achieved. The elastic protrusions are in various forms and can flexibly adapt to different electrical connection requirements. At the same time, the integrally - formed technology improves the manufacturing efficiency and product consistency. This structure not only simplifies the installation and disassembly process, enhances the system integration and maintenance convenience, but also improves the connection stability and reliability, significantly improving the overall system performance.

[0085] In a plug - and - play connection structure in an exemplary embodiment, the elastic protrusions and the electrode insertion slot are of a split - connection structure. The elastic protrusions include any one or more of the following: strip - shaped protrusions connected by welding, columnar protrusions connected by welding, and elastic pieces connected by welding. Specifically, these protrusions are fixedly connected to the electrodes by welding methods. This design ensures a firm mechanical connection and excellent electrical contact performance between the electrodes and the insertion slot. The application of welding technology improves the durability of the structure and ensures sufficient elasticity to withstand the physical pressure during the plug - and - play process, effectively reducing contact wear caused by frequent operations. In addition, the connection structure design supports various forms of elastic protrusions, increasing the variability of the design and allowing adjustment of the gate drive structure according to specific application scenarios and manufacturing requirements. Different forms of protrusions provide diverse choices to meet different connection stability, cost - control, and manufacturing process requirements. This flexibility not only expands the application scope of the product but also optimizes the production process and reduces costs.

[0086] Combined with Figures 4 - 6As shown, a plug-and-play connection structure in an exemplary embodiment includes an electrode group and an electrode socket, and a locking buckle is provided in the structure to further improve the stability of the elastic connection of the electrodes. The locking buckle is composed of a buckle 224 and a buckle fixing groove 323 which are arranged in cooperation; among them, the buckle 224 is integrally arranged on the electrode socket, and the buckle fixing groove 323 is integrally arranged on the circuit board provided with the electrode group, that is, the circuit board provided with the electrode group. It should be noted that the buckle fixing groove 323 can also be directly arranged on the electrode group; in addition, the opening position of the buckle fixing groove 323 can be the side of the circuit board or the electrode group, or other parts, subject to the connection requirements of the buckle 224.

[0087] In this embodiment, the buckle 224 is integrated on the second plug-in end, that is, the housing connection board 2; the buckle fixing groove 323 is integrated on the first plug-in end, that is, the gate driver board 3. In this embodiment, the elastic connection between the electrode group and the electrode socket provides a preliminary mechanical and electrical connection, and the locking buckle further ensures the firmness and stability of the connection through the simple operation of the buckle 224. This design is not only convenient to operate, avoiding the complexity brought by connection methods such as screws, but also effectively reducing the time and labor input during installation and disassembly.

[0088] In the above embodiment provided by the present application, through the setting of the locking buckle, the stability of the elastic connection of the electrodes is significantly improved, ensuring the reliability and safety of the system during operation, and there is no need for independent connection structures such as gaskets, fasteners, screws and nuts. Compared with traditional connection methods such as screws and fasteners, the locking buckle is more convenient to operate, not only improving the installation efficiency, but also reducing the risk of poor connection caused by screw loosening or falling off. The overall design realizes an efficient and stable electrical connection, simplifies the maintenance and replacement operations, and significantly improves the integration and reliability of the system.

[0089] The plug-and-play connection structure in an exemplary embodiment adopts an integrated design of a housing 223 and a buckle 224 system. The electrode insertion slot can be connected to a surrounding housing 223 by welding. This design improves the stability of the overall structure and protects the electrode insertion slot from the external environment. The material and design of the housing 223 ensure the elasticity and stability required for electrode connection. In addition, the buckle 224 is directly arranged on the housing 223 and is rotationally connected to the fixed shaft of the housing 223. This integrated design not only optimizes the assembly of components but also enhances the overall stability and operational convenience of the structure. Further, a circuit board provided with an electrode group has a buckle fixing groove 323 formed by a routing process at its edge, which precisely cooperates with the buckle 224 to ensure the reliability of the connection. The design of this buckle fixing groove 323 allows for quick and stable connection and release, greatly improving the efficiency of assembly and maintenance. The buckle 224 realizes rotational connection through mounting holes or mounting slots used in conjunction with the fixed shaft, allowing for flexible adjustment and fixation, further enhancing the mechanical strength and durability of the connection.

[0090] In the above embodiment provided by the present application, through its highly integrated housing 223 and buckle 224 design, the structural stability and operational convenience of the electrode insertion slot are significantly improved. This design not only ensures the high elasticity and stability of the electrical connection but also enhances the reliability and maintenance efficiency of the overall device through optimized component integration and precise manufacturing processes.

[0091] Combined with Figures 7 - 8 As shown, in the plug-and-play connection structure in an exemplary embodiment, the first plug-and-play end is integrally arranged on the shell connecting plate 2, that is, the electrode group is integrally arranged on the shell connecting plate 2; the second plug-and-play end is integrally arranged on the gate drive board 3, that is, the electrode insertion slot is integrally arranged on the gate drive board 3. Specifically, the positions of the first plug-and-play end and the second plug-and-play end can be interchanged and flexibly adjusted according to actual needs, so as to adapt to different installation and use environments, improve the adaptability and flexibility of the system; adapt to a variety of application scenarios, and significantly enhance the overall performance and maintenance convenience of the system.

[0092] As Figure 4As shown, an exemplary embodiment provides a gate drive board 3, which is designed to provide an optimized electrical connection solution for turn-off thyristor devices. The gate drive board 3 includes a functional area integrated with a drive circuit module, i.e., the second functional area 31; and an interface area for electrode connection, i.e., the second interface area 32. The second interface area 32 is designed with the aforementioned first plug-in end or second plug-in end, and these ports support elastic electrode connection with the shell connection board 2. Specifically, through the introduction of elastic electrode connection, the interface between the gate drive board 3 and the shell connection board 2 is not only mechanically more stable but also superior in electrical performance. The elastic connection design allows a certain degree of physical movement, thus reducing mechanical stress caused by thermal expansion and contraction of the device or other external factors, which is particularly important in a system operating for a long time. In addition, the elastic connection also provides the convenience of quick plugging and unplugging, simplifying the device maintenance and upgrade process.

[0093] In the above embodiment provided by this application, through the elastic electrode connection in its design, the mechanical and electrical stability of the connection is significantly improved. This design not only optimizes the signal transmission quality but also provides higher operation flexibility and maintenance convenience, and is particularly suitable for power electronic applications requiring high reliability and easy maintainability.

[0094] As Figure 4 shown, in a gate drive board 3 in an exemplary embodiment, the interface area, i.e., the second interface area 32, is provided with a first plug-in end (i.e., an electrode group), and the first plug-in end is provided with two electrodes; one of the two electrodes is connected to the gate output port, and the other is connected to the cathode output port.

[0095] Specifically, the second interface area 32 includes a second upper electrode 321 and a second lower electrode 322, as well as a snap fixing groove 323. These two electrodes are respectively made of copper foils processed by removing the solder mask layer on the surface of the PCB (Printed Circuit Board) and applying an immersion gold process or a metal plating process to form wear-resistant and oxidation-resistant contact surfaces. The first upper electrode 221 and the first lower electrode 222 are respectively connected to the gate and cathode output ends in the second functional area 31 to ensure the effective transmission of electrical signals and good electrical contact performance. The chamfering process is used to manufacture the snap fixing groove 323, which prevents the relative movement between the shell connection board 2 and the functional board when the snap 224 is closed, providing a firm connection. When it is necessary to replace or maintain the gate drive board 3, it can be easily pulled out after unlocking the snap 224.

[0096] In the above embodiments provided by the present application, the electrode design adopts advanced surface treatment technology, enhancing the durability and antioxidant ability of the contact electrodes, ensuring the stability and long-term reliability of the electrical connection. In addition, the design of the snap fixing groove 323 provides a fast and safe mechanical locking mechanism, simplifying the maintenance and replacement process of the device, and optimizing the overall operation efficiency and the service life of the device.

[0097] As Figure 3 shown, an exemplary embodiment provides a turn-off thyristor device, the core components of which include a housing connection plate 2 and a gate drive plate 3, and the plug-in connection structure therebetween. The housing connection plate 2 is integrated on the housing package of the turn-off thyristor device, while the gate drive plate 3 is elastically connected to the housing connection plate 2 through this plug-in connection structure. This design allows the gate drive plate 3 to be quickly and reliably separated from or connected to the housing connection plate 2 when necessary, thus simplifying the assembly and maintenance processes. The elastic connection characteristic of the electrodes ensures stable electrical contact even when the device is subjected to physical stresses such as vibration or thermal expansion.

[0098] In the above embodiments provided by the present application, the adoption of elastic electrode connection significantly enhances the reliability and durability of the overall device. This connection method allows a certain amount of physical displacement, reducing the impact of mechanical stress on the connection points, thereby extending the service life of the device. At the same time, this technical solution improves the operation flexibility of the device, enabling high-efficiency performance to be maintained in different operating environments. In addition, the fast plug-and-play characteristic greatly improves the maintenance efficiency in case of failure and reduces the downtime.

[0099] Combined with Figure 5 、 Figure 7 shown, in the turn-off thyristor device in an exemplary embodiment, the housing connection plate 2 is optimized, especially in the design of the first functional area 21, to enhance the overall electrical and mechanical performance. Specifically, the densely arranged vias in the functional area are used to improve the electrical connection performance between different copper foil layers in the housing connection plate 2. These vias effectively reduce the impedance of the electrical interconnection, thereby improving the signal transmission speed and the overall electrical stability. In addition, the annular hollow area in the functional area is specially designed to embed the housing package of the turn-off thyristor device, ensuring the tight integration of the device. The connection holes surrounding this hollow area allow the housing package of the thyristor device to be firmly mechanically connected to the connection plate using screws. This design not only improves the reliability of the assembly but also facilitates quick maintenance and replacement when needed.

[0100] In the above embodiments provided by the present application, these design improvements of the shell connection plate, such as the optimized via layout and the annular hollowed-out area, significantly improve the electrical connection performance and mechanical stability of the turn-off thyristor device. The application of vias reduces the electrical impedance, improves the overall efficiency and response speed, while the design of the mechanical connection ensures the physical stability and long-term durability of the turn-off thyristor device and the shell connection plate during operation.

[0101] Combined with Figures 9 - 11 As shown, another exemplary embodiment provides a turn-off thyristor device. Both the shell connection plate 2 and the gate drive plate 3 are based on multi-layer PCB boards. The shell connection plate 2 includes a first interface area 22 and a first functional area 21. The shell connection plate 2 is also provided with a wiring terminal 23 for connecting the external circuit electrode. The wiring terminal 23 is welded to the first functional area 21. The first interface area 22 of the shell connection plate 2 is provided with a second plug-in end (i.e., an electrode plugging slot), and the second plug-in end is provided with three electrodes, including: a first upper electrode 221, a first lower electrode 222, and a first left separation electrode 225.

[0102] In specific operations, the first upper electrode 221 and the first lower electrode 222 are respectively connected to the gate and cathode of the first functional area 21. The first left separation electrode 225 is connected to the signal end of the wiring terminal 23 of the first functional area 21. The function of this wiring terminal 23 is to connect the external circuit electrode of the turn-off thyristor, such as connecting the anode of the turn-off thyristor through a static voltage-sharing resistor to realize the sampling of the anode-cathode voltage of the device. Such a setting enables the first left separation electrode 225 to independently process signal acquisition without being affected by the main current path, thereby improving the accuracy and reliability of the measurement.

[0103] Similarly, the gate drive plate 3 also includes a second interface area 32 and a second functional area 31. The second interface area 32 is provided with a first plug-in end (i.e., an electrode group), and the first plug-in end is provided with three electrodes, including: a second upper electrode 321, a second lower electrode 322, and a second left separation electrode 324. Among them, the second upper electrode 321 and the second lower electrode 322 are respectively connected to the gate and cathode of the second functional area 31. The second left separation electrode 324 is set to be connected to the sampling circuit of the second functional area 31, enabling it to operate independently of the main power drive circuit and being specifically responsible for processing the sampling signal. This independent sampling path reduces signal interference, enhances the electrical isolation of the system, and further ensures the accuracy of signal processing and the overall safety of the system.

[0104] In the above embodiments provided by the present application, the settings of the first left separation electrode 225 and the second left separation electrode 324 significantly enhance the functionality and operational safety of the turn-off thyristor device. These separation electrodes provide independent signal sampling and processing channels, enabling voltage measurement to be free from interference from the main current path and increasing the accuracy of measurement data. In addition, this design simplifies the circuit layout, improves the reliability of the device and the convenience of maintenance. By providing clear electrical isolation and dedicated signal processing paths, these separation electrodes are crucial for enhancing the overall performance and stability of the turn-off thyristor device.

[0105] Combined Figures 12 - 14 As shown, an exemplary another embodiment provides a turn-off thyristor device. The first interface area 22 of the housing connection plate 2 is provided with a second plug-in end (i.e., an electrode socket), and the second plug-in end is provided with four electrodes to be configured to process currents of different natures, thereby significantly improving the accuracy of current processing and the performance of the device. Among them, the four electrodes include a first upper electrode 221, a first lower electrode 222, a first left separation electrode 225, and a first right separation electrode 226.

[0106] In specific operations, the first upper electrode 221 and the first lower electrode 222 are respectively connected to the first current power ports of the gate and the cathode, that is, the large current power ports. These ports process large currents, usually in the range of several hundred amperes to several thousand amperes. This design can effectively reduce the sampling distortion caused by stray electrical parameters, such as inductance and capacitance, in the large current electrode traces. To improve the precise sampling and processing of signals, the first left separation electrode 225 and the first right separation electrode 226 are set to be connected to the first current signal ports of the gate and the cathode, that is, the small current signal ports. These ports process small currents, usually in the range of several milliamperes to several amperes. This separated electrode configuration allows the signal current to be physically isolated from the power current, avoiding interference from high-power currents, thereby enhancing the accuracy and reliability of the signals.

[0107] The gate drive board 3 also adopts a similar design strategy. Its second interface area 32 is provided with a first plug-in end (i.e., an electrode group), and the first plug-in end is provided with four electrodes; the four electrodes include: a second upper electrode 321, a second lower electrode 322, a second left separation electrode 324, and a second right separation electrode 325; among them, the second left separation electrode 324 and the second right separation electrode 325 are connected to the sampling circuit of the second functional area 31. These separation electrodes specifically process the sampling signals, ensuring the signal integrity and accuracy of the sampling circuit and avoiding data errors caused by the influence of high currents in the circuit.

[0108] In the above embodiments provided by the present application, by providing a plurality of dedicated separate electrodes in the housing connection plate 2 and the gate driver board 3, it is possible to isolate and process currents of different natures. The first left separate electrode 225 and the first right separate electrode 226 specifically process low-power signal currents in the housing connection plate 2, while the second left separate electrode 324 and the second right separate electrode 325 process high-precision sampling signals in the gate driver board 3. This design not only improves the electrical performance of the system and the accuracy of the signals, but also enhances the reliability and long-term stability of the device. In addition, this electrode configuration strategy significantly reduces the interference of high-power currents on low-power signal processing, and optimizes the overall function and performance of the turn-off thyristor device.

[0109] In summary, in the above embodiments provided by the application, the turn-off thyristor device effectively improves the mechanical and electrical stability of the device through the integrated housing connection plate and gate driver board, and the elastic plug-and-play connection structure of the electrodes between them. This design not only optimizes the maintainability and reliability of the device, but also ensures continuous performance under long-term and harsh working conditions.

[0110] Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, and their appropriate combinations. In the hardware implementation, the division between the functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be executed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information such as computer-readable instructions, data structures, program modules, or other data. Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassette, tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, a communication medium typically contains computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium.

Claims

1. A plug-in connection structure for a turn-off thyristor device, characterized in that: The plug-in connection structure is configured as an electrode elastic connection structure, and the plug-in connection structure is used to realize the connection between the tube shell connection plate and the gate driving plate of the turn-off thyristor device; The plug-in connection structure comprises a first plug-in end and a second plug-in end elastically connected to each other, the first plug-in end and the second plug-in end are separately arranged, one of the first plug-in end and the second plug-in end is integrated on the gate driving board, and the other is integrated on the tube shell connecting board; The first plug-in end and the second plug-in end each include at least three electrodes; one of the at least three electrodes is configured to be connected to a gate port, two are configured to be connected to a cathode port, and the remaining are configured to be connected to a sampling circuit; the first plug-in end is configured to be a layered stacked electrode group, and the second plug-in end is configured to be an electrode plug-in slot that cooperates with the electrode group, the electrode plug-in slot is composed of electrodes arranged oppositely, and an internal accommodation space for accommodating the electrode group is provided in the electrode plug-in slot; The electrode at the entrance of the electrode slot is configured as a curved plate, a corrugated plate, or a bent plate structure; or, the inner surface of the electrode slot or the outer surface of the electrode group is provided with an integrally formed elastic protrusion; the curved plate, corrugated plate, bent plate, and elastic protrusion are all used to achieve an elastic clamping connection between the electrode group and the electrode slot.

2. The plug connection structure according to claim 1, characterized in that: The insertion and removal direction of the electrode group in the electrode insertion slot is set to a first direction; The electrode insertion slot is open at the slot entrance, and the spacing between the relatively arranged electrodes at the slot entrance is greater than the thickness of the electrode group; the electrode insertion slot is closed at the middle position along the first direction, and the spacing between the relatively arranged electrodes at the middle position of the electrode insertion slot is less than the thickness of the electrode group.

3. The plug connection structure according to claim 1, characterized in that: The elastic protrusions include any one or more of the following: strip protrusions formed by bending, columnar protrusions formed by stamping, and spring pieces formed by stamping.

4. The plug-in connection structure according to any one of claims 1 to 3, characterized in that: The plug-in connection structure is also provided with a locking buckle; The locking buckle comprises a buckle and a buckle fixing groove which are arranged in cooperation with each other, the buckle is integrated on the electrode plug-in groove, and the buckle fixing groove is integrated on the electrode group or on a circuit board provided with the electrode group.

5. The plug connection structure according to claim 4, characterized in that: The electrode insertion slot is welded to a shell, and the shell is arranged around the electrode insertion slot; The buckle is arranged on the housing, a fixed shaft is arranged on the housing, the buckle is provided with a mounting hole or a mounting groove matching the fixed shaft, and the buckle is rotatably connected with the fixed shaft through the mounting hole or the mounting groove; The buckle fixing groove is configured as a buckle fixing groove formed by a gong edge process.

6. A gate drive board, comprising a second functional area provided with a drive circuit module and a second interface area for connecting electrodes, characterized in that: The second interface area is provided with a first plug-in end or a second plug-in end of the plug-in connection structure according to any one of claims 1 to 3, and the first plug-in end or the second plug-in end is used to realize an elastic connection of electrodes between a tube shell connection plate of a turn-off thyristor device and the gate drive plate; The first plug-in end or the second plug-in end provided in the second interface area is provided with at least three electrodes; One of the at least three electrodes is connected to the gate output port of the second functional area, two of the at least three electrodes are connected to the cathode output port of the second functional area, and the remaining electrodes are connected to the sampling circuit of the second functional area.

7. A turn-off thyristor device, comprising a tube shell connecting plate and a gate driving plate, characterized in that: The tube-shell connecting plate and the gate driving plate are connected using the plug-in connection structure as described in any one of claims 1 to 3.

8. The turn-off thyristor device according to claim 7, characterized in that: The tube shell connection plate is integrated on the tube shell package of the turn-off thyristor device, and the tube shell connection plate is provided with a first interface area and a first functional area, and the first interface area is provided with the first plug-in end or the second plug-in end.

9. The turn-off thyristor device according to claim 8, characterized in that: The tube shell connection plate is also provided with a connection terminal for connecting to an external circuit electrode; The first plug-in end or the second plug-in end provided in the first interface area is provided with three electrodes; One of the three electrodes is connected to the gate output port of the first functional area, a second is connected to the cathode output port of the first functional area, and a third is connected to the connection terminal of the first functional area.

10. The turn-off thyristor device according to claim 8, characterized in that: The first plug-in end or the second plug-in end provided in the first interface area is provided with four electrodes; One of the four electrodes is connected to the current power port of the gate of the first functional area, a second is connected to the current signal port of the gate of the first functional area, a third is connected to the current power port of the cathode of the first functional area, and a fourth is connected to the current signal port of the cathode of the first functional area.

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