CN217406387U

CN217406387U - Frequency converter

Info

Publication number: CN217406387U
Application number: CN202220921283.3U
Authority: CN
Inventors: 张学峰; 顾聪
Original assignee: Zhejiang Eacn Electronic Science & Technology Co ltd
Current assignee: Zhejiang Eacn Electronic Science & Technology Co ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2022-09-09
Anticipated expiration: 2032-04-20

Abstract

The utility model relates to a frequency converter, which is characterized in that a first containing groove, a plurality of through holes allowing electrolytic capacitors to extend to the upper part of a connecting plate and a second containing groove are sequentially arranged at the corresponding mounting positions of a module radiator, an electrolytic capacitor and a silicon controlled radiator; the first containing groove is internally provided with an IGBT module connected with the module radiator, the middle position of the top surface of the PCB is provided with at least three output copper bars extending rightwards, the output copper bars and the PCB below are kept with wiring areas used for arranging wires, and the silicon controlled module is arranged in the second containing groove and connected with the silicon controlled radiator. The IGBT module, the silicon controlled rectifier module and the electrolytic capacitor are connected and integrated on the main circuit PCB, most space of the frequency converter is saved, and the whole volume of the frequency converter can be obviously compressed. The design makes the main loop present horizontal arrangement, has obviously improved the utilization ratio in converter inner space. The wiring area also makes connecting wire be convenient for arrange in order, has further improved the utilization ratio in converter inner space.

Description

Frequency converter

Technical Field

The utility model belongs to the technical field of the converter, especially, relate to a converter.

Background

Due to the continuous development and progress of science and technology, a frequency converter requiring low power in the market has the functions of small volume and convenient installation, so that the frequency converter can also realize the operations of assembly, maintenance, disassembly and the like in a small space. However, in the existing middle and small power frequency converter, due to the existence of the rectifier module and the inverter module, all the parts are connected in a layer-by-layer erection mode, and the unreasonable arrangement of copper bars results in a large volume of the middle and small power frequency converter, the internal space of the frequency converter is seriously wasted, and the existing market requirements cannot be met.

Chinese patent application No. 201520954307.5 discloses a converter, makes also be formed with certain interval between the rectangular channel that sets up with the IGBT single tube correspondence on the PCB circuit board through arranging IGBT single tube interval to make things convenient for the laying out wiring of other circuits. Although the function of certain reasonable layout can be achieved, the problem of wiring among circuits is solved, the internal space of the frequency converter cannot be really and effectively utilized to reduce the size of the frequency converter, and the method has great limitation.

Disclosure of Invention

In order to solve the technical problem, the utility model aims at providing a converter through reasonable arranging and the overall arrangement to inner structure to improve converter inner space's utilization ratio, reduce holistic volume, fully provided market demand.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a frequency converter comprises a connecting plate, a PCB, a fan, a module radiator, an electrolytic capacitor and a silicon controlled radiator, wherein the fan, the module radiator, the electrolytic capacitor and the silicon controlled radiator are sequentially arranged at the lower end of the connecting plate from left to right; the built-in IGBT module that has the linking module radiator of first storage tank, the top surface middle part position department of PCB board is equipped with the output copper bar that extends right of at least three, keeps somewhere on the PCB board of output copper bar and below having the wiring district that is used for arranging the wire, and the top surface right side position department of PCB board is equipped with the female row of negative pole that extends right and anodal female arranging along the front and back symmetry, female arranging of negative pole and anodal arranging between being equipped with at least three input copper bar, input copper bar one end is connected with the silicon controlled rectifier module, and the silicon controlled rectifier module is arranged in the second storage tank and is connected with the silicon controlled rectifier radiator.

The connecting plate is used for fixing all parts in the frequency converter, all the parts are reasonably arranged in the case, the fan is arranged on the leftmost side of the connecting plate, the module radiator, the electrolytic capacitor and the silicon controlled radiator are respectively and sequentially arranged at the lower ends of the connecting plate corresponding to the first accommodating groove, the through hole and the second accommodating groove from left to right, the module radiator and the IGBT module are tightly connected through the arranged first accommodating groove, the upper end of the electrolytic capacitor can extend to the upper side of the connecting plate through the through hole, the upper ends of the electrolytic capacitor and the IGBT module are connected to the PCB, and the space utilization rate is improved due to the tight connection. The output copper bar that top surface middle part position department of PCB board was equipped with forms the wiring district between the PCB board of corresponding below, can be used for arranging the direction and the position of wire, and the wiring district lies in overall structure's middle part position department, both can reduce the connection length of wire, also can concentrate the wire to arrange and arrange on the wiring district, is convenient for arrange wire arrangement classification and subsequent inspection maintenance etc..

The silicon controlled rectifier radiator passes through second storage tank and silicon controlled rectifier module zonulae occludens, and the input copper bar of connecting on the silicon controlled rectifier module is located between female arranging of negative pole that extends right and the female arranging of anodal, and the output copper bar that extends right also is located the female arranging of negative pole and the female top of arranging between the tip of anodal, further the inside space of rational utilization converter.

The IGBT module, the silicon controlled module and the electrolytic capacitor are connected and integrated on the main circuit PCB, so that the arrangement space of the main circuit of the frequency converter is concentrated at the lower position of the frequency converter, and most space of the frequency converter is saved.

Preferably, the wiring areas for arranging the conducting wires are reserved on the output copper bars and the PCB below the output copper bars, namely, one ends of the three output copper bars are integrally connected with the switching pieces perpendicular to the PCB, and the output copper bars are wiring areas through the interval areas formed between the switching pieces and the PCB; the switching piece lower extreme is connected with first welding terminal, and first welding terminal is connected on the PCB board.

The wiring district is the region that is used for arranging the trend position of converter in-connection wire, through the setting of the switching piece of perpendicular to PCB board for be formed with the interval between output copper bar and the PCB board, thereby keep somewhere out the wiring district, wiring district position is located PCB board right side top, arranges overall structure's middle part position department in, the arrangement of the wire of can being convenient for sums up and arranges, also inspection and the maintenance in the follow-up use of being convenient for.

Preferably, the output copper bar is further connected with a Hall sensor located above the PCB to avoid the wiring area space, and the Hall sensor is located at the leftmost end of the output copper bar. Hall sensor connects on the output copper bar, is in the top in wiring district for Hall sensor can not obstruct connecting wire's arranging.

As preferred, female one end of arranging with the anodal female row of negative pole is connected with second welded terminal, and second welded terminal connects on PCB board top surface right side, female arranging of negative pole, anodal female arranging and silicon controlled rectifier module between be connected with electrically conductive row.

First solder terminal and second solder terminal's effect plays transitional coupling's effect on the one hand for the connection of each part and PCB board is more convenient and the fastening, and on the other hand has certain interval in vertical direction when also making each part and PCB board connect, and the connection of the wire of being convenient for and each part is arranged, the subsequent inspection maintenance of also being convenient for.

Preferably, the front side and the rear side of the top surface of the PCB are connected with a plurality of heat dissipation patches which are transversely arranged along the length direction of the PCB at intervals so as to avoid interference with the space of the wiring area. The heat dissipation paster is guaranteeing under its heat dissipation function's the prerequisite, along PCB board length direction transverse arrangement, and all is located side position department, can avoid arranging to the wiring district as far as in to make wiring district space reduce, the interval arrangement of heat dissipation paster can not hinder connecting wire's trend yet, can pass from the interval of heat dissipation paster and connect.

Preferably, a capacitor sheath for protecting the PCB is sleeved on the part of the electrolytic capacitor extending above the connecting plate. The capacitor sheath can protect the PCB so as to share the acting force of the electrolytic capacitor on the PCB of the main loop.

Compared with the prior art, the beneficial effects of the utility model are that:

compare in traditional converter with each part layer upon layer the accumulation the connected mode of arranging or with the mode of IGBT single tube interval arrangement and then the interval of reserving the wiring in order to improve space utilization, the utility model discloses with the connection integration between IGBT module, silicon controlled rectifier module, the electrolytic capacitor at major loop PCB board for the major loop of converter arranges the space and all concentrates on the below position of converter, has practiced thrift most space of converter, makes the whole volume of converter can obtain obvious compression. Meanwhile, the IGBT module, the silicon controlled module and the electrolytic capacitor are separated, and the IGBT module is arranged on the left side; the electrolytic capacitor is in the middle; the silicon controlled module is arranged on the right side. The design makes the main loop present horizontal arrangement, has obviously improved the utilization ratio in converter inner space. The wiring district also makes connecting wire be convenient for arrange in order, carries out reasonable layout, has further improved the utilization ratio in converter inner space.

The welding terminal sets up and makes and be formed with the interval between each part and the PCB board, and the installation of being convenient for is dismantled and is maintained, can not hinder arranging and moving towards of wire yet, and the position that hall sensor connects and the position that the heat dissipation paster was arranged have also further improved the utilization efficiency in space, and then dwindled the holistic volume of converter.

Drawings

Fig. 1 is a schematic view of the overall structure of the intermediate frequency converter of the present invention;

fig. 2 is a schematic diagram of the explosion structure of the intermediate frequency converter of the present invention;

FIG. 3 is a schematic structural view of the connecting plate of the present invention with the electrolytic capacitor and the PCB removed;

FIG. 4 is a schematic view of the connection structure of the electrolytic capacitor and the PCB board of the present invention.

Description of the drawings: 1. a connecting plate; 2. a fan; 3. a module heat sink; 4. an electrolytic capacitor; 5. a silicon controlled radiator; 6. a first accommodating groove; 7. a through hole; 8. a second accommodating groove; 9. an IGBT module; 10. a PCB board; 11. outputting a copper bar; 13. a negative busbar; 14. a positive busbar; 15. inputting a copper bar; 18. a silicon controlled module; 19. a wiring area; 20. a patch; 21. a first solder terminal; 22. a second solder terminal; 23. a conductive bar; 24. a Hall sensor; 25. heat dissipation paster; 26. a capacitive sheath.

Detailed Description

The following describes in detail an embodiment of the present invention with reference to the drawings.

In the embodiment, a frequency converter is specifically disclosed, as shown in fig. 1-4, the specific structure of the frequency converter comprises a connecting plate 1, a PCB 10, and a fan 2, a module radiator 3, an electrolytic capacitor 4, and a thyristor radiator 5 which are sequentially installed from left to right on the lower end of the connecting plate 1, wherein the lower end of the PCB 10 is connected to the upper ends of the module radiator 3 and the electrolytic capacitor 4; the module radiator 3, the electrolytic capacitor 4 and the silicon controlled radiator 5 are provided with a first containing groove 6, a plurality of through holes 7 allowing the electrolytic capacitor 4 to extend to the upper part of the connecting plate 1 and a second containing groove 8 in sequence at corresponding mounting positions; an IGBT module 9 connected with the module radiator 3 is arranged in the first accommodating groove 6; the top surface middle part department of PCB board 10 is equipped with at least three output copper bar 11 that extends right, keeps somewhere on PCB board 10 of output copper bar 11 and below to have the wiring district 19 that is used for arranging the wire, and the top surface right side position department of PCB board 10 is equipped with female 13 of arranging the negative pole that extends right and anodal female 14 of arranging along the fore-and-aft direction symmetry, female 13 of arranging of negative pole and anodal female arranging 14 between be equipped with at least three

input copper bar

15, and 15 one end of input copper bar is connected with silicon controlled module 18, and silicon controlled module 18 arranges in second storage tank 8 and is connected with silicon controlled radiator 5.

When the frequency converter is assembled and laid out, the fan 2 is installed below the leftmost connecting plate 1, then the module radiator 3, the electrolytic capacitor 4 and the silicon controlled radiator 5 are sequentially and correspondingly installed at the lower end of the connecting plate 1 through the first accommodating groove 6, the through hole 7 and the second accommodating groove 8 which are formed in the connecting plate 1, the IGBT module 9 and the module radiator 3 are connected through the first accommodating groove 6, meanwhile, the upper end of the electrolytic capacitor 4 extends out of the through hole 7 to the same height as the IGBT module 9, and then the PCB 10 is connected to the upper ends of the IGBT module 9 and the electrolytic capacitor 4; and the silicon controlled rectifier module radiator 5 next to and setting up at electrolytic capacitor 4 is connected with silicon controlled rectifier module 18 through second storage tank 8, and the connection integration between IGBT module 9, silicon controlled rectifier module 18, electrolytic capacitor 4 is at major loop PCB board 10 for the major loop of converter arranges the space and all concentrates on the below position of converter, has practiced thrift most space of converter, makes the whole volume of converter can obtain obvious compression. Meanwhile, the IGBT module 9, the silicon controlled module 18 and the electrolytic capacitor 4 are separated, the IGBT module 9 is arranged on the left side, the electrolytic capacitor 4 is arranged in the middle, and the silicon controlled module 18 is arranged on the right side, so that the main circuit is transversely arranged, and the utilization rate of the inner space of the frequency converter is obviously improved.

When the PCB 10 is installed on the upper ends of the electrolytic capacitor 4 and the IGBT module 9, the right half part of the PCB 10 is located at the middle position of the whole structure, the output copper bar 11 extending to the right side and the right half part of the top surface of the PCB 10 connected at the middle position of the top surface of the PCB 10 form a wiring area 19, which is convenient for arrangement and layout of connecting wires in a frequency converter, the negative busbar 13 and the positive busbar 14 connected at the rightmost side of the top surface of the PCB 10 also extend to the right side, on the one hand, the reasonable layout is achieved, on the other hand, the output copper bar 11, the negative busbar 13 and the positive busbar 14 are prevented from being crossed with each other, troubles of installation and use are caused, the input copper bar 15 connected to the upper end of the silicon controlled module 18 is also arranged between the negative busbar 13 and the positive busbar 14, and the space utilization rate is further improved.

As shown in fig. 1, the arrangement areas 19 for arranging the wires are reserved on the output copper bars 11 and the PCB 10 below the output copper bars 11, that is, one end of each of the three output copper bars 11 is integrally connected with an adapter sheet 20 perpendicular to the PCB 10, and the arrangement area 19 is an interval area formed between each of the output copper bars 11 and the PCB 10 through the adapter sheet 20; the lower end of the interposer 20 is connected with a first soldering terminal 21, and the first soldering terminal 21 is connected to the PCB 10.

In the equipment production of converter, there is the connection of wire to arrange scheduling problem usually, if it is unreasonable to arrange and probably to cause follow-up dismantlement and the trouble of maintenance, output copper bar 11 makes to be formed with certain interval between output copper bar 11 and the PCB board 10 through the adaptor piece 20 of perpendicular setting on PCB board 10, thereby form wiring district 19, and adaptor piece 20 is located PCB board 10 middle part, consequently, PCB board 10 top surface right half part all can be used to lay wire, and wiring district 19 is located overall structure's middle part, the thread to the wire of connecting each part reduces greatly, all can present on wiring district 19 simultaneously and carry out overall arrangement and arrangement, the equipment production has been made things convenient for, also be convenient for subsequent inspection maintenance.

As shown in fig. 1 and 2, the output copper bar 11 is further connected with a hall sensor 24 located above the PCB 10 to avoid the space of the wiring area 19, and the hall sensor 24 is located at the leftmost end of the output copper bar 11. The connection of hall sensor 24 is on output copper bar 11, and the interval of output copper bar 11 and PCB board 10 makes hall sensor 24 can not obstruct and influence the arrangement of connecting wire on PCB board 10, fully improves the utilization ratio in space.

As shown in fig. 1-2 and fig. 4, one end of the negative busbar 13 and one end of the positive busbar 14 are connected with a second welding terminal 22, the second welding terminal 22 is connected to the right side of the top surface of the PCB 10, and a conductive bar 23 is connected between the negative busbar 13, the positive busbar 14 and the thyristor module.

The solder terminals are provided for facilitating the connection of the components to the PCB 10, and are made of brass to provide good electrical conductivity; the surface treatment is tinning treatment, so that the welding is firmer; the contact area is selected to be 14.5mmX14.5mm in size so as to provide a larger contact area, and large current can be carried in the area; the press riveting with the thread form M5 can ensure that the welding terminal is connected with the copper bar more firmly. Wherein major loop PCB board and solder terminal positive and negative all weld when the welding for both weld more firmly and be difficult for causing rosin joint and weld insecure. On the other hand, the components and the PCB 10 are spaced, and the direction of the lead is not affected.

As shown in fig. 1 or 4, the front and rear sides of the top surface of the PCB 10 are connected to a plurality of heat dissipation patches 25 which are transversely spaced along the length direction of the PCB to avoid interference with the space of the wiring area 19. The heat dissipation patch 25 is a brass sheet with a thickness of 8mmx4mmx0.3mm to improve the heat dissipation performance of the main circuit PCB board 10, so that the main circuit PCB board 10 can stably operate for a long time. The heat dissipation patches 25 are spaced at the lateral side of the PCB 10 without affecting the direction of the wires and the space of the wiring area 19.

As shown in fig. 1 and 2, a capacitor sheath 26 is sleeved on the part of the electrolytic capacitor 4 extending above the connection plate 1. The main circuit PCB 10 is made of a 2mm thick substrate, and the capacitor sheath 26 shares the force of the electrolytic capacitor 4 on the main circuit PCB to prevent the deformation of the PCB 10 caused by the electrolytic capacitor 4.

The above description in this specification is merely illustrative of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A frequency converter comprises a connecting plate (1), a PCB (printed circuit board) (10), a fan (2), a module radiator (3), an electrolytic capacitor (4) and a silicon controlled radiator (5), wherein the fan (2), the module radiator (3), the electrolytic capacitor (4) and the silicon controlled radiator are sequentially arranged at the lower end of the connecting plate (1) from left to right; the electrolytic capacitor is characterized in that the lower end of the PCB (10) is connected to the upper ends of the module radiator (3) and the electrolytic capacitor (4), and the module radiator (3), the electrolytic capacitor (4) and the silicon controlled rectifier radiator (5) are sequentially provided with a first accommodating groove (6), a plurality of through holes (7) allowing the electrolytic capacitor (4) to extend to the upper part of the connecting plate (1) and a second accommodating groove (8) at corresponding mounting positions; an IGBT module (9) connected with the module radiator (3) is arranged in the first accommodating groove (6); the top surface middle part position department of PCB board (10) is equipped with at least three output copper bar (11) that extend right, keeps somewhere on PCB board (10) of output copper bar (11) and below to have wiring district (19) that are used for arranging the wire, and the top surface right side position department of PCB board (10) is equipped with female (13) of the negative pole that extend right and anodal female arranging (14) along the fore-and-aft direction symmetry, female arranging (13) of negative pole and anodal arranging (14) between be equipped with at least three input copper bar (15), input copper bar (15) one end is connected with silicon controlled module (18), and silicon controlled module (18) are arranged in second storage tank (8) and are connected with silicon controlled radiator (5).

2. The frequency converter according to claim 1, wherein the output copper bars (11) and the PCB (10) below the output copper bars (11) are provided with wiring areas (19) for arranging wires, that is, one end of each of the three output copper bars (11) is integrally connected with an adapter sheet (20) perpendicular to the PCB (10), and the output copper bars (11) are provided with the wiring areas (19) through the spacing areas formed between the adapter sheets (20) and the PCB (10); the lower end of the adapter sheet (20) is connected with a first welding terminal (21), and the first welding terminal (21) is connected to the PCB (10).

3. The frequency converter according to claim 2, characterized in that the output copper bar (11) is further connected with a hall sensor (24) which is positioned above the PCB (10) to avoid the space of the wiring area (19), and the hall sensor (24) is positioned at the leftmost end of the output copper bar (11).

4. The frequency converter according to claim 1, wherein one end of the negative busbar (13) and the positive busbar (14) is connected with a second welding terminal (22), the second welding terminal (22) is connected to the right side of the top surface of the PCB (10), and a conductive bar (23) is connected between the negative busbar (13), the positive busbar (14) and the silicon controlled module.

5. The frequency converter according to claim 1, wherein the front and rear sides of the top surface of the PCB (10) are connected with a plurality of heat dissipation patches (25) which are transversely spaced along the length direction of the PCB to avoid interference with the space of the wiring area (19).

6. Frequency converter according to claim 1, characterized in that the part of the electrolytic capacitor (4) extending above the connection plate (1) is further sleeved with a capacitor sheath (26) for protecting the PCB board (10).