Inversion loop module of three-level frequency converter and three-level frequency converter

Abstract

The utility model provides a three-level frequency converter inversion loop module and a three-level frequency converter, and relates to the technical field of frequency converters. The inversion loop module of the three-level frequency converter comprises a substrate and three single-phase inversion loop modules. The substrate is provided with a mounting surface. The three single-phase inversion loop modules are arranged on the mounting surface at intervals and are detachably connected with the substrate; and the three single-phase inversion loop modules are electrically connected with one another. The three-level frequency converter provided by the utility model adopts the inversion loop module of the three-level frequency converter. The three-level frequency converter inversion loop module and the three-level frequency converter provided by the utility model can improve the technical problem of difficult maintenance caused by complex frequency converter lines in the prior art.

Description

TECHNICAL FIELD

[0001] The utility model relates to frequency converter technical field, specifically, three -level frequency converter inverter loop module and three -level frequency converter. BACKGROUND

[0002] Usually the inverter loop of frequency converter is installed on the heat sink in flat arrangement, especially three -level frequency converter uses more power devices, and the corresponding other support circuit devices are also more, and the connection and line between each other are more complex, and the maintenance is difficult. CONTENT OF THE UTILITY MODEL

[0003] The utility model solves the technical problem of how to improve the technical problem of difficult maintenance caused by complex frequency converter line in the prior art.

[0004] The embodiment of the utility model can be realized as follows:

[0005] The utility model provides a three -level frequency converter inverter loop module, which comprises:

[0006] The substrate is provided with a mounting surface;

[0007] Three single -phase inverter loop modules are arranged on the mounting surface at intervals, and are detachably connected with the substrate; the three single -phase inverter loop modules are electrically connected with each other.

[0008] The three -level frequency converter inverter loop module provided by the utility model has the beneficial effects of the prior art, which includes:

[0009] When the three -level frequency converter inverter loop module is applied to three -level frequency converter, the assembly of three single -phase inverter loop modules can be completed on the substrate first, and then the whole formed by the substrate and the three single -phase inverter loop modules is installed in the three -level frequency converter, which reduces the assembly difficulty. In the case of single -phase loop failure, the substrate and the three single -phase inverter loop modules can be removed as a whole, and then the single -phase inverter loop module with failure can be removed and replaced, which can realize the modular maintenance and replacement of single -phase loop, and reduces the maintenance difficulty. Based on this, the three -level frequency converter inverter loop module can improve the technical problem of difficult maintenance caused by complex frequency converter line in the prior art.

[0010] Optionally, the substrate is provided with three mounting areas, and the three mounting areas are arranged in a "pin" shape; the three single -phase inverter loop modules are arranged in the three mounting areas respectively.

[0011] Optionally, at least one side of the substrate is provided with a wedge-shaped fixing part, and the thickness of the fixing part gradually decreases away from the center of the substrate.

[0012] Optionally, the substrate is provided with an assembly hole, the assembly hole is provided at two opposite ends of the fixing part, and the assembly hole penetrates the substrate along the thickness direction of the substrate.

[0013] Optionally, the assembly hole forms an opening at the side edge of the substrate.

[0014] A three-level frequency converter comprises a shell, a pressing plate and the three-level frequency converter inverter circuit module, the shell is provided with a containing space, at least one side of the shell is provided with an assembly opening, the substrate is assembled into the containing space through the assembly opening, and the pressing plate is arranged at the assembly opening and used for pressing the side edge of the substrate.

[0015] Optionally, the pressing plate comprises a fixing body and a pressing part, the fixing body is fixedly connected with the shell, the pressing part is arranged at one side of the fixing body, the pressing part is wedge-shaped, a clamping groove matched with the fixing part is formed at one side of the fixing part close to the side edge of the substrate, and the side edge of the substrate is pressed.

[0016] Optionally, the three-level frequency converter further comprises a filter capacitor and a busbar, the shell is further provided with two spaced fixing plates, the filter capacitor is fixedly connected between the two fixing plates, the busbar is fixedly connected with the shell, and the connecting terminal of the busbar extends out of the assembly opening, the busbar is arranged at one side of one of the fixing plates away from the other fixing plate, and the filter capacitor is electrically connected with the busbar through the fixing plate.

[0017] Optionally, an ampere plug is further arranged outside the shell, the ampere plug is electrically connected with the driving circuit of the single-phase inverter circuit module, and the ampere plug is used for external connection.

[0018] Optionally, handles are arranged at two opposite sides of the shell.

[0019] The three-level frequency converter adopts the three-level frequency converter inverter circuit module, and the beneficial effects of the three-level frequency converter relative to the prior art are the same as those of the three-level frequency converter inverter circuit module relative to the prior art, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced the drawings needed to be used in the embodiments, it should be understood, the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for the ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0021] Figure 1 A structure schematic diagram of a three-level frequency converter provided in an embodiment of the present application is shown in Figure 1.

[0022] Figure 2 A structure schematic diagram of a three-level frequency converter provided in an embodiment of the present application is shown in Figure 1.

[0023] Figure 3 A structure schematic diagram of a three-level frequency converter provided in an embodiment of the present application is shown in Figure 1.

[0024] Figure 4 A structure schematic diagram of a three-level frequency converter provided in an embodiment of the present application is shown in Figure 1.

[0025] Figure: three-level frequency converter 10, three-level frequency converter inverter circuit module 100, substrate 110, mounting surface 101, fixed part 111, assembly hole 112, opening 113, single-phase inverter circuit module 120, shell 200, containing space 210, loading port 211, handle 220, pressing plate 300, fixed body 310, pressing part 320, clamping groove 321, filter capacitor 400, fixed plate 500, busbar 600, amp plug 700. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0028] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0029] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0031] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0032] Please see Figure 1 and Figure 2 This utility model provides a three-level inverter inverter circuit module 100 and a three-level inverter 10 using the three-level inverter inverter circuit module 100. The three-level inverter inverter circuit module 100 and the three-level inverter 10 provided by this utility model can improve the technical problem of difficult maintenance caused by the complexity of inverter circuits in the prior art.

[0033] In this embodiment, please refer to Figure 1 The three-level inverter circuit module 100 includes a base plate 110 and three single-phase inverter circuit modules 120. The base plate 110 has a mounting surface 101. The three single-phase inverter circuit modules 120 are spaced apart on the mounting surface 101 and are detachably connected to the base plate 110; the three single-phase inverter circuit modules 120 are electrically connected to each other. The electrical connection of the three single-phase inverter circuit modules 120 forms a three-phase circuit, realizing the arrangement of the inverter circuit of the inverter. When the three single-phase inverter circuit modules 120 are mounted on the base plate 110, the base plate 110 and the three single-phase inverter circuit modules 120 form a whole, enabling modular assembly and disassembly.

[0034] In the above description, when the three-level inverter inversion loop module 100 is applied to the three-level inverter 10, the three single-phase inversion loop modules 120 can be assembled on the substrate 110 first, and then the whole formed by the substrate 110 and the three single-phase inversion loop modules 120 is installed in the three-level inverter 10 as a whole, thereby reducing the assembly difficulty. In the case of a single-phase loop failure, the substrate 110 and the three single-phase inversion loop modules 120 can be removed as a whole, and then the failed single-phase inversion loop module 120 can be replaced, thereby realizing the modular maintenance and replacement of the single-phase loop and reducing the maintenance difficulty. Therefore, the three-level inverter inversion loop module 100 can improve the technical problem of the existing technology that the complex inverter circuit leads to difficult maintenance.

[0035] That is, the three-level inverter inversion loop module 100 can be assembled, disassembled, and replaced as a whole in the three-level inverter 10, and the three single-phase inversion loop modules 120 on the substrate 110 can be assembled, disassembled, and replaced as independent individuals. Therefore, the inversion loop circuit in the three-level inverter 10 can be simplified, the complexity thereof can be reduced, and the convenience of maintenance and replacement can be improved, thereby achieving the purpose of improving the technical problem of the existing technology that the complex inverter circuit leads to difficult maintenance.

[0036] In the present embodiment, the substrate 110 is provided with three mounting areas, and the three mounting areas are arranged in a "pin" shape. The three single-phase inversion loop modules 120 are arranged in the three mounting areas, respectively. The three mounting areas are arranged in a "pin" shape, which can facilitate the electrical connection between the three single-phase inversion loop modules 120, and can also make the arrangement positions of the three single-phase inversion loop modules 120 more compact, thereby efficiently utilizing the space on the substrate 110 and improving the space utilization.

[0037] It should be understood that in other embodiments, in order to avoid other electronic components in the three-level inverter 10, the arrangement positions of the three single-phase inversion loop modules 120 can be adjusted according to the actual situation. For example, the three single-phase inversion loop modules 120 can be arranged along an L-shaped path.

[0038] In the embodiment, at least one side of the substrate 110 is provided with a wedge-shaped fixing portion 111, the thickness of the fixing portion 111 gradually decreases in the direction away from the center of the substrate 110; the fixing portion 111 is used to be inserted into the clamping groove 321 formed by the wedge-shaped pressing plate 300 to fix the substrate 110. By arranging the wedge-shaped fixing portion 111, when the three-level inverter circuit module 100 is assembled, the fixing of the substrate 110 can be realized by inserting the fixing portion 111 into the clamping groove 321, and then the fixing of the three-level inverter circuit module 100 is realized, the assembly difficulty is reduced, and the assembly efficiency is improved. In addition, by using this method, the stability of the substrate 110 can be improved, and when the substrate 110 is disassembled, it can be relatively simple, and the substrate 110 can be directly extracted.

[0039] In order to further improve the stability of the substrate 110, in the embodiment, an assembly hole 112 is arranged on the substrate 110, the assembly hole 112 is arranged at the opposite ends of the fixing portion 111, and the assembly hole 112 penetrates the substrate 110 in the thickness direction of the substrate 110. The reinforcement of the substrate 110 as a whole can be realized by assembling a bolt in the assembly hole 112. Among them, the bolt fixing method not only improves the stability effect, but also is convenient for disassembly.

[0040] Further, the assembly hole 112 forms an opening 113 at the side of the substrate 110. By arranging the assembly hole 112 in the form of the opening 113, when the mounting position of the substrate 110 is not fixed, it can be ensured that the bolt can pass through the assembly hole 112 to realize the fixing of the substrate 110; in other words, even when there is an error in the precision of the mounting position of the substrate 110, the fixing of the substrate 110 can still be realized by the bolt passing through the assembly hole 112.

[0041] Please refer to Figures 1 to 4 The three-level inverter 10 provided in the embodiment includes a shell 200, a pressing plate 300 and the three-level inverter circuit module 100 described above; the shell 200 is provided with a containing space 210, and at least one side of the shell 200 is provided with an assembly inlet 211; the substrate 110 is assembled into the containing space 210 from the assembly inlet 211; the pressing plate 300 is arranged at the assembly inlet 211 to press the side of the substrate 110.

[0042] Optionally, the assembly inlets 211 are arranged on the opposite sides of the shell 200, the pressing plate 300 can be first fixed at the outside of one of the assembly inlets 211; then the substrate 110 is assembled into the shell 200 from the other assembly inlet 211, and the fixing portion 111 is inserted into the clamping groove 321 formed by the pressing plate 300, so that the fixing of the substrate 110 is completed, and the assembly efficiency of the three-level inverter circuit module 100 is improved.

[0043] Of course, in other embodiments, the three-level inverter 10 can also be installed first, and then the three-level inverter 10 is fixed and compressed by the installation of the pressing plate 300.

[0044] Optionally, in the embodiment, the pressing plate 300 includes a fixed body 310 and a pressing part 320; the fixed body 310 is used for fixed connection relative to the shell 200; the fixed body 310 used for fixed connection relative to the shell 200 can refer to: first, the fixed body 310 can be directly connected with the shell 200 to realize the fixation; second, the fixed body 310 can be fixedly connected on the bearing body bearing the shell 200 to realize the fixation relative to the shell 200. Further, the pressing part 320 is arranged on one side of the fixed body 310, and the pressing part 320 is wedge-shaped and is used for pressing the side edge of the substrate 110. That is, the pressing part 320 forms a clamping groove 321 on the side close to the fixed part 111, and when the three-level inverter 10 is installed, the fixed part 111 is inserted into the clamping groove 321, that is, the pressing part 320 can realize the compression of the fixed part 111, and the fixation of the substrate 110 is completed.

[0045] In the embodiment, the three-level inverter 10 further includes a filter capacitor 400 and a busbar 600, and two spaced fixed plates 500 are further arranged in the shell 200, and the filter capacitor 400 is fixedly connected between the two fixed plates 500; the busbar 600 is fixedly connected to the shell 200, and the connecting terminal of the busbar 600 extends from the installation opening 211; the busbar 600 is arranged on the side of one of the fixed plates 500 away from the other fixed plate 500, and the filter capacitor 400 is electrically connected with the busbar 600 by penetrating through the fixed plate 500.

[0046] Further, the shell 200 further has an amp plug 700 on the outside, the amp plug 700 is electrically connected with the drive circuit of the single-phase inverter circuit module 120, and the amp plug 700 is used for external circuit. The drive circuit of the single-phase inverter circuit module 120 is a prior art, which will not be described here.

[0047] In addition, in the embodiment, the shell 200 has a handle 220 on the opposite sides. The operator can directly carry and move the three-level inverter 10 through the handle 220, which is convenient for carrying the three-level inverter 10. In the embodiment, the handle 220 and the installation opening 211 are arranged on the same side of the shell 200.

[0048] In summary, the three-level frequency converter inversion loop module 100 and the three-level frequency converter 10 provided in the embodiments of the present application can complete the assembly of the three single-phase inversion loop modules 120 on the substrate 110 first, and then the whole formed by the substrate 110 and the three single-phase inversion loop modules 120 is installed in the three-level frequency converter 10 as a whole, thereby reducing the assembly difficulty. In the case of a single-phase loop failure, the substrate 110 and the three single-phase inversion loop modules 120 can be removed as a whole, and then the single-phase inversion loop module 120 with the failure is removed and replaced, so that the single-phase loop modular maintenance and replacement can be realized, thereby reducing the maintenance difficulty. Based on this, the three-level frequency converter inversion loop module 100 can improve the technical problem of the existing technology that the complex frequency converter circuit leads to the maintenance difficulty. Through the cooperation of the fixing portion 111 and the pressing plate 300, the installation stability of the three-level frequency converter inversion loop module 100 in the three-level frequency converter 10 can be improved; since the wedge-shaped fixing portion 111 and the wedge-shaped pressing portion 320 are cooperated with each other, the assembly and disassembly can be facilitated, and the efficiency of the assembly and disassembly can be improved. Through the setting of the handle 220 on the shell 200, the carrying of the three-level frequency converter 10 can be facilitated.

[0049] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A three-level frequency converter inverter leg module (100), characterized in that, The utility model relates to a three -level frequency converter inverter circuit module, including: A substrate (110) is provided with a mounting surface (101) on the substrate (110); Three single -phase inverter circuit modules (120) are provided on the mounting surface (101) at intervals, and are detachably connected with the substrate (110); three single -phase inverter circuit modules (120) are electrically connected with each other.

2. The three-level frequency converter inverter leg module (100) of claim 1, characterized in that, Three mounting areas are provided on the substrate (110), and the three mounting areas are arranged in a "pin" shape; three single -phase inverter circuit modules (120) are respectively arranged in the three mounting areas.

3. The three-level frequency converter inverter leg module (100) of claim 1, characterized in that, At least one side of the substrate (110) is provided with a wedge-shaped fixing part (111), and the thickness of the fixing part (111) gradually decreases in the direction away from the center of the substrate (110).

4. The three-level frequency converter inverter leg module (100) of claim 3, characterized in that, An assembly hole (112) is formed in the substrate (110), the assembly hole (112) is formed at the opposite ends of the fixing part (111), and the assembly hole (112) penetrates the substrate (110) in the thickness direction of the substrate (110).

5. The three-level frequency converter inverter leg module (100) of claim 4, characterized in that, The assembly hole (112) forms an opening (113) at the side of the substrate (110).

6. A three-level frequency converter (10), characterized by The utility model relates to a three -level frequency converter inverter circuit module, including:

7. The three-level frequency inverter (10) according to claim 6, characterized in that The utility model relates to a three -level frequency converter inverter circuit module, including:

8. The three-level frequency inverter (10) according to claim 6, characterized in that The utility model relates to a three -level frequency converter inverter circuit module, including: The utility model relates to a three -level frequency converter inverter circuit module, including: The utility model relates to a three -level frequency converter inverter circuit module, including:

9. The three-level frequency inverter (10) according to claim 8, characterized in that The shell (200) is externally provided with an AMP plug (700), the AMP plug (700) is electrically connected with the driving circuit of the single-phase inversion loop module (120), and the AMP plug (700) is used for external circuit.

10. The three-level frequency inverter (10) according to claim 6, characterized in that Opposite sides of the shell (200) are provided with handles (220).

Images