PCB type power distribution system of high-voltage frequency converter

Abstract

The PCB type power distribution system comprises a machine shell, a plurality of installation mortise columns, a plurality of PCBs, two sets of cross beam structures, a plurality of electrical devices, an upper port wiring end, a lower port wiring end and a wiring assembly. The plurality of PCBs are arranged on the plurality of mounting mortise columns; the two sets of beam structures are arranged in the machine shell and arranged in the length direction of the machine shell in a spaced mode. The beam structures are located on the side, away from the bottom plate, of the PCB, and gaps are formed between the beam structures and the PCB. The electrical devices are arranged on the two groups of cross beam structures; the wiring assembly is arranged between the PCB and the electrical device; according to the distribution box, the whole system is modularized, circuits are integrated through the PCB, end-to-end connection is carried out through cables, connection of all electrical devices is achieved, the wiring workload is reduced, the assembling and debugging work of products is simplified, packaging modeling can be carried out through the good mechanical performance and electrical performance of the PCB, and the reliability of the distribution box is improved. And interchange and maintenance of a whole machine product are facilitated.

Description

Technical Field

[0001] The present application relates to the field of power distribution technology, and in particular to a high-voltage inverter PCB type power distribution system. Background Art

[0002] A distribution box is an electrical device that centrally manages power distribution. It is used to output electrical energy from a high-voltage transmission system to various user devices. It is generally composed of basic components such as a distribution box rack, bus, circuit breaker, contactor, etc., and according to the electrical wiring requirements, the switchgear, measuring instruments, protective electrical appliances and auxiliary equipment are assembled in a closed or semi-enclosed metal cabinet or on a screen to form a low-voltage distribution box.

[0003] The supply of electricity plays a very important role in the normal production and work of society. Among the current high and low voltage frequency conversion system distribution box control methods, the traditional distribution box control method mainly realizes the distribution, control, protection and other functions through the switch control box composed of various electrical components such as circuit breakers, contactors, relays, etc. This traditional distribution system often needs to use a large number of cables to connect electrical components to realize the control function. The complex cable connection in the distribution box is not only cumbersome and time-consuming, but also occupies a lot of manpower, and the wiring is prone to errors, which makes the overall distribution box not beautiful and tidy.

[0004] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of this application is to provide a high-voltage inverter PCB type power distribution system, aiming to solve the technical problem of complex cable connection in the distribution box.

[0006] To achieve the above-mentioned purpose, the present application provides a high-voltage inverter PCB-type power distribution system, which includes: a casing, a plurality of mounting mortise posts, a plurality of PCB circuit boards, two groups of crossbeam structures, a plurality of electrical components, an upper terminal, a lower terminal and a wiring assembly; wherein the casing has a bottom plate; a plurality of the mounting mortise posts are evenly distributed and fixedly mounted on the bottom plate of the casing; a plurality of the PCB circuit boards are arranged on a plurality of the mounting mortise posts; the two groups of crossbeam structures are arranged in the casing and are arranged at intervals along the length direction of the casing, the crossbeam structures are located on a side of the PCB circuit board away from the bottom plate and have a gap with the PCB circuit board; a plurality of the electrical components are arranged on the two groups of crossbeam structures; the upper terminal is arranged at the top of the PCB circuit board; the lower terminal is arranged at the bottom of the PCB circuit board; and the wiring assembly is arranged between the PCB circuit board and the electrical components.

[0007] Optionally, the wiring assembly includes: a plurality of electrical device terminals, a plurality of solder pad holes and a plurality of contactor signal circuit terminals; wherein, a plurality of the electrical device terminals are distributed in a linear array and are opened on the bottom surfaces of a plurality of the electrical devices; a plurality of the solder pad holes are distributed in a linear array and are opened on the PCB circuit board in one-to-one correspondence with a plurality of the electrical device terminals, and the solder pad holes do not overlap with the orthographic projections of the electrical devices on the PCB circuit board 3; a plurality of the contactor signal circuit terminals are distributed in a linear array and are arranged on the surface of the PCB circuit board away from the bottom plate.

[0008] Optionally, the electrical device includes a contactor; the wiring assembly also includes: a plurality of contactor signal circuit terminals and a plurality of contactor main circuit terminals; wherein, a plurality of the contactor signal circuit terminals are distributed in a linear array and are opened on one side of each of the contactors close to the contactor signal circuit terminal; a plurality of the contactor main circuit terminals are distributed in a linear array and are opened on one side of each of the contactors close to the pad hole.

[0009] Optionally, the high-voltage inverter PCB power distribution system further includes: insulating paper, which is arranged on the surface of the base plate, and the insulating paper has a through hole adapted to the mounting mortise at a position corresponding to the mounting mortise.

[0010] Optionally, the housing further comprises: a cover plate, a first connecting plate and a second connecting plate, wherein: The cover plate is arranged at a position relative to the base plate, and a mounting opening adapted to the electrical device is provided on the cover plate; the first connecting plate connects the cover plate and one end of the base plate along the length direction, and a yield opening adapted to the upper terminal is provided on the first connecting plate; the second connecting plate connects the cover plate and the other end of the base plate along the length direction, and a yield opening adapted to the lower terminal is provided on the second connecting plate.

[0011] Optionally, pin terminals are provided at a plurality of the pad holes.

[0012] Optionally, the casing is made of cold-rolled sheet material.

[0013] Optionally, the PCB circuit board includes at least four conductive layers stacked in sequence in a thickness direction thereof.

[0014] Optionally, the contactor signal circuit terminal is arranged at a position on the PCB circuit board corresponding to the electrical device terminal.

[0015] Optionally, each of the electrical components is provided with a buckle adapted to the cross beam structure at a position close to the cross beam structure.

[0016] The embodiment of the present application proposes a high-voltage inverter PCB type power distribution system, in which a plurality of mounting mortise posts are evenly distributed and fixedly mounted on the bottom plate of the casing, providing an installation foundation for the PCB circuit board for stable use; the crossbeam structure can be used for the installation of various electrical components, and the installation position can be adjusted, so the installation is convenient and the use is stable; the upper terminal and the lower terminal are used in combination to allow the distribution box to be electrically connected to the outside; through the wiring assembly, each electrical component can be directly electrically connected to the PCB circuit board, ensuring that the distribution box is more concise, and each electrical component is fixed above the PCB circuit board through the crossbeam structure, and each electrical component cannot be directly welded The components are connected to the PCB board, and are connected to the PCB circuit board through connecting components. When designing the PCB circuit board, the device package design model can be built. The whole system is modularized by the above-mentioned matching distribution box, and the PCB circuit board integrates the lines. The end-to-end connection is made through cables. The PCB can replace complex wiring to achieve electrical connection between various components in the circuit, reducing the wiring workload under traditional methods, simplifying the assembly and debugging of the product, and the PCB circuit board has good mechanical and electrical properties, realizing assembly line production, so that the entire assembled and debugged PCB circuit board can be used as a spare part, which is convenient for the interchange and maintenance of the whole product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a high-voltage inverter PCB type power distribution system provided in an embodiment of the present application; Figure 2 This is a schematic diagram of the front cross-section structure of the housing in the embodiment of the present application; Figure 3 It is a schematic diagram of a top view and a cross-section of the structure of the housing in the embodiment of the present application; Figure 4 It is a cross-sectional view of the casing in the embodiment of the present application.

[0018] Figure numerals: 1. Casing; 2. Mounting mortise; 3. PCB circuit board; 4. Beam structure; 5. Electrical device; 6. Electrical device terminal; 7. Contactor; 8. Contactor signal circuit terminal; 10. Pad hole; 11. Upper terminal; 12. Lower terminal; 13. Insulating paper; 14. Contactor signal circuit terminal; 15. Contactor main circuit terminal; 16. Mounting port.

[0019] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0024] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 A schematic diagram of the structure of a high-voltage inverter PCB type power distribution system provided in an embodiment of the present application; Figure 2 This is a schematic diagram of the front cross-section structure of the housing in the embodiment of the present application; Figure 3 It is a schematic diagram of a top view and a cross-section of the structure of the housing in the embodiment of the present application; Figure 4 It is a cross-sectional view of the casing in the embodiment of the present application.

[0026] The present application embodiment provides a high-voltage inverter PCB type power distribution system, such as Figure 1 As shown, the high-voltage inverter PCB type power distribution system may include a housing 1, a plurality of mounting posts 2, a plurality of PCB circuit boards 3, two sets of beam structures 4, a plurality of electrical components 5, an upper terminal 11, a lower terminal 12, and a wiring assembly; Among them, the casing 1 has a bottom plate; a plurality of mounting mortise columns 2 are evenly distributed and fixedly installed on the bottom plate of the casing 1; a plurality of PCB circuit boards 3 are arranged on the plurality of mounting mortise columns 2; two groups of beam structures 4 are arranged in the casing 1 and are arranged at intervals along the length direction of the casing 1, and the beam structures 4 are located on the side of the PCB circuit board 3 away from the bottom plate and have a gap between the PCB circuit board 3; a plurality of electrical devices 5 are arranged on the two groups of beam structures 4; the upper terminal 11 is arranged at the top of the PCB circuit board 3; the lower terminal 12 is arranged at the bottom of the PCB circuit board 3; and the wiring assembly is arranged between the PCB circuit board 3 and the electrical device 5.

[0027] The housing 1 has a bottom plate that provides installation positions for a plurality of mounting mortise posts 2. The plurality of mounting mortise posts 2 are evenly distributed and fixedly installed on the bottom plate of the housing 1. The mounting mortise posts 2 provide a foundation for the installation of the PCB circuit board 3 so as to ensure stable use.

[0028] A plurality of PCB circuit boards 3 are arranged on a plurality of mounting posts 2. The circuits in the distribution box are integrated by using the PCB circuit boards 3, thereby saving time and labor costs, and making the internal wiring of the distribution box neater, clearer and more standardized.

[0029] Two groups of beam structures 4 are arranged in the housing 1 and are arranged at intervals along the length direction of the housing 1. The beam structures 4 are located on the side of the PCB circuit board 3 away from the bottom plate and have a gap between them and the PCB circuit board 3. The beam structures 4 can be used to install electrical devices 5 and contactors 7, and the installation position can be adjusted. The two groups of beam structures 4 are arranged in the housing 1, and the gaps are left between the two groups of beam structures 4 and the PCB circuit board 3, which can effectively increase the strength and rigidity of the housing 1, help disperse and reduce the impact of external impact on the PCB circuit board 3, and improve the heat dissipation performance of the PCB circuit board 3. In addition, the gap can avoid direct contact between the PCB circuit board 3 and the electrical devices 5 arranged on the beam structures 4, reduce mechanical stress and potential electrical interference, and thus improve the reliability and durability of the equipment.

[0030] A plurality of electrical devices 5 are arranged on two groups of beam structures 4; each electrical device 5 is installed on the beam structure 4, which is convenient to install and stable to use.

[0031] The upper terminal 11 is arranged at the top of the PCB circuit board 3; the lower terminal 12 is arranged at the bottom of the PCB circuit board 3. The upper terminal 11 and the lower terminal 12 are used together to electrically connect the distribution box to the outside.

[0032] Please combine Figure 2 and Figure 3 For reference, the wiring assembly is arranged between the PCB circuit board 3 and the electrical device 5. Through the wiring assembly, the electrical device 5 can be directly electrically connected to the PCB circuit board 3, ensuring a more concise distribution box.

[0033] Specifically, the electrical device 5 is fixed above the PCB circuit board 3 through the beam structure 4. The electrical device 5 cannot be directly soldered on the PCB board, but is connected to the PCB circuit board 3 through a connecting component. When designing the PCB circuit board 3, a package model can be designed for the device.

[0034] Furthermore, the housing 1 may also include a cover plate, a first connection plate, and a second connection plate; wherein the cover plate is arranged at a position relative to the bottom plate, and a mounting opening 16 adapted to the electrical device 5 is provided on the cover plate; the first connection plate connects one end of the cover plate and the bottom plate along the length direction, and a clearance opening adapted to the upper terminal 11 is provided on the first connection plate; the second connection plate connects the other end of the cover plate and the bottom plate along the length direction, and a clearance opening adapted to the lower terminal 12 is provided on the second connection plate. The electrical device 5 can extend to the outside of the housing 1 through the mounting opening 16 so that the staff can operate it, and the wires through the clearance openings can be electrically connected to the upper terminal 11 and the lower terminal 12.

[0035] In some embodiments, the high-voltage inverter PCB power distribution system may further include insulating paper 13, which is arranged on the surface of the base plate, and the insulating paper 13 has a through hole corresponding to the position of the mounting mortise 2 and adapted to the mounting mortise 2.

[0036] Specifically, the insulating paper 13 is attached to the surface of the bottom plate, and the mounting post 2 passes through the through hole opened on the insulating paper 13. The casing 1 and the PCB circuit board 3 are isolated by the setting of the insulating paper 13, thereby improving the insulation effect of the casing 1 and the PCB circuit board 3.

[0037] In some embodiments, the housing 1 is made of cold-rolled sheet material; the cold rolling process is widely used in industry, such as automobile manufacturing, electrical products, aviation, precision instruments, etc. Since rolling is performed at room temperature, no iron oxide scale is produced, and the cold-rolled product has high dimensional accuracy, good durability and heat resistance. The housing 1 is made of cold-rolled sheet material to ensure the use strength of the housing 1 and increase the durability of the entire device.

[0038] In some embodiments, at least four conductive layers are stacked in sequence in the thickness direction thereof; at least four layers of PCB circuit board 3 are designed, three layers are respectively the three-phase main circuits A, B, and C of the three-phase alternating current, and one layer is used to design the copper plating of the neutral line and other lines, thereby achieving the purpose of isolation. It should be noted that the embodiment of the present application does not limit the number of layers of the PCB circuit board and the positional relationship of the three-phase main circuits A, B, and C of the three-phase alternating current, as long as the isolation purpose can be achieved.

[0039] In some embodiments, each electrical device 5 is provided with a buckle adapted to the beam structure 4 at a position close to the beam structure 4; each electrical device 5 is installed by snapping with the beam structure 4 through the buckle, which makes disassembly more convenient.

[0040] Please continue to combine Figure 1 , Figure 2 , Figure 3 , Figure 4 For reference, in an exemplary embodiment, the wiring assembly may include a plurality of electrical device terminals 6, a plurality of solder pad holes 10, and a plurality of contactor signal circuit terminals 14; wherein, the plurality of electrical device terminals 6 are distributed in a linear array and are opened on the bottom surfaces of the plurality of electrical devices 5; the plurality of solder pad holes are distributed in a linear array and are opened on the PCB circuit board in one-to-one correspondence with the plurality of electrical device terminals, and the solder pad holes do not overlap with the orthographic projections of the electrical devices on the PCB circuit board 3; the plurality of contactor signal circuit terminals 14 are distributed in a linear array and are arranged on the surface of the PCB circuit board 3 away from the bottom plate.

[0041] Specifically, the electrical device terminal 6 connects the electrical device 5 to the PCB circuit board 3 through a cable, and the corresponding pad hole 10 on the PCB circuit board 3 is used to connect to the electrical device terminal 6 corresponding to the electrical device 5, that is, the electrical connection between the electrical device 5 and the PCB circuit board 3 is realized. One end of the cable is connected to the PCB circuit board 3, and is soldered at the position of the pad hole 10 on the PCB circuit board 3 by stripping and tinning, and the other end is connected to the electrical device terminal 6 corresponding to the electrical device 5, that is, the corresponding wire crimping terminal of the device is used. For the length of the cable, it is necessary to measure the distance from the device connection point to the PCB circuit board 3, and reserve a suitable length for welding and processing the wire crimping terminal.

[0042] In some embodiments, the electrical device 5 may include a contactor 7; the wiring assembly may also include: a plurality of contactor signal circuit terminals 8 and a plurality of contactor main circuit terminals 15, wherein the plurality of contactor signal circuit terminals 8 are distributed in a linear array and opened on one side of each contactor 7 close to the contactor signal circuit terminal 14; the plurality of contactor main circuit terminals 15 are distributed in a linear array and opened on one side of each contactor 7 close to the solder pad hole 10.

[0043] Specifically, for a device such as the contactor 7 having double-row terminals, the contactor signal circuit terminal 8 is connected to the contactor signal circuit terminal 14 through a cable, and the contactor main circuit terminal 15 is connected to the pad hole 10 through a cable, so as to realize the electrical connection between each contactor 7 and the PCB circuit board 3; it should be noted that the contactor signal circuit terminal 8 is connected to the contactor signal circuit terminal 14 through a cable, thereby realizing the electrical connection between the electrical device 5 and the PCB circuit board 3, and the contactor main circuit terminal 15 is connected to the pad hole 10 through a cable to realize the electrical connection between the electrical device 5 and the PCB circuit board 3, so that the cable connecting the contactor main circuit terminal 15 and the pad hole 10 and the cable connecting the contactor signal circuit terminal 8 and the contactor signal circuit terminal 14 do not interfere with each other, which not only saves the space of the PCB circuit board 3 but also solves the interference problem.

[0044] In some embodiments, pin terminals are disposed at a plurality of the pad holes 10 .

[0045] Specifically, the electrical device terminal 6 connects the electrical device 5 with the PCB circuit board 3 through a cable. A pin terminal can be set at the position of the solder pad hole 10, and one end of the cable is fixedly connected to the pin terminal using an OT terminal, and the other end of the cable is connected to the electrical device terminal 6 corresponding to the electrical device 5, that is, the crimping terminal corresponding to the device is used for connection; the method of connecting the OT terminal and the pin terminal only requires fixing the OT terminal and the pin terminal with screws, and the electrical connection between the electrical device 5 and the PCB circuit board 3 can be completed without stripping and tinning the cable, which makes the operation more convenient.

[0046] Furthermore, the contactor signal circuit terminal 14 is arranged at a position on the PCB circuit board 3 corresponding to the electrical device terminal 6, so that when the electrical device terminal 6 and the contactor signal circuit terminal 14 are connected by cable, they can be located inside the casing 1, and the connection is simpler.

[0047] The high-voltage inverter PCB type power distribution system proposed in the embodiment of the present application realizes the electrical connection between various components in the circuit by PCB in the power distribution system, replaces the complex wiring, reduces the wiring workload under the traditional method, simplifies the assembly and debugging of the product, and reduces the manpower and time cost of the product. The PCB circuit board 3 has good mechanical and electrical properties, improves the product quality and product reliability, and has good maintainability and interchangeability. The PCB circuit board 3 realizes assembly line production, so that the entire assembled and debugged PCB circuit board 3 can be used as a spare part, which is convenient for the interchange and maintenance of the product, and has good product unit interchangeability. It adopts standardized design and production, which is conducive to the mechanization of welding and the automation of production, improves production efficiency and standardizes production.

[0048] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A high voltage inverter PCB type power distribution system, characterized in that: include: The housing (1) has a bottom plate; A plurality of mounting mortise posts (2) are evenly distributed and fixedly mounted on the bottom plate of the housing (1); A plurality of PCB circuit boards (3) are arranged on the plurality of mounting posts (2); Two groups of cross-beam structures (4) are arranged in the housing (1) and are spaced apart along the length direction of the housing (1); the cross-beam structures (4) are located on a side of the PCB circuit board (3) away from the bottom plate and have a gap between them and the PCB circuit board (3); A plurality of electrical devices (5) are arranged on the two groups of beam structures (4); An upper connection terminal (11) is arranged on the top of the PCB circuit board (3); A lower connection terminal (12) is arranged at the bottom end of the PCB circuit board (3); A wiring assembly is arranged between the PCB circuit board (3) and the electrical device (5).

2. The high-voltage inverter PCB type power distribution system according to claim 1 is characterized in that: The wiring assembly comprises: A plurality of electrical device connection terminals (6) are distributed in a linear array and are arranged on the bottom surfaces of the plurality of electrical devices (5); A plurality of pad holes (10) are arranged on the PCB circuit board (3) in a linear array and correspond one to one with the plurality of electrical device terminals (6), and the pad holes (10) and the orthographic projections of the electrical devices (5) on the PCB circuit board (3) do not overlap; A plurality of contactor signal circuit connection terminals (14) are arranged in a linear array and distributed on a surface of the PCB circuit board (3) facing away from the bottom plate.

3. The high-voltage inverter PCB type power distribution system according to claim 2 is characterized in that: The electrical device (5) includes a contactor (7); the wiring assembly also includes: A plurality of contactor signal circuit wiring terminals (8) are distributed in a linear array and are arranged on one side of each of the contactors (7) close to the contactor signal circuit wiring terminal (14); A plurality of contactor main circuit connection terminals (15) are distributed in a linear array and are opened on one side of each of the contactors (7) close to the pad hole (10).

4. The high-voltage inverter PCB type power distribution system according to claim 1, characterized in that: Also includes: Insulating paper (13) is arranged on the surface of the bottom plate, and a through hole adapted to the mounting mortise (2) is opened in the insulating paper (13) at a position corresponding to the mounting mortise (2).

5. The high-voltage inverter PCB type power distribution system according to claim 1, characterized in that: The housing (1) further comprises: A cover plate, arranged at a position opposite to the base plate, and provided with a mounting opening (16) adapted to the electrical device (5); A first connecting plate, connecting the cover plate and one end of the bottom plate along the length direction, and the first connecting plate is provided with a clearance opening adapted to the upper connection terminal (11); A second connecting plate connects the cover plate and the other end of the bottom plate along the length direction, and the second connecting plate is provided with a clearance opening adapted to the lower connection terminal (12).

6. The high-voltage inverter PCB type power distribution system according to claim 2, characterized in that: Pin terminals are provided at a plurality of the pad holes (10).

7. The high-voltage inverter PCB type power distribution system according to claim 1, characterized in that: The casing (1) is made of cold-rolled sheet material.

8. The high-voltage inverter PCB type power distribution system according to claim 1, characterized in that: The PCB circuit board (3) comprises at least four conductive layers which are stacked in sequence in the thickness direction thereof.

9. The high-voltage inverter PCB type power distribution system according to claim 2, characterized in that: The contactor signal circuit connection terminal (14) is arranged at a position on the PCB circuit board (3) corresponding to the electrical device connection terminal (6).

10. The high-voltage inverter PCB type power distribution system according to claim 5, characterized in that:Each of the electrical components (5) is provided with a buckle adapted to the cross beam structure (4) at a position close to the cross beam structure (4).

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