CN213937728U

CN213937728U - Inverter with modular structure

Info

Publication number: CN213937728U
Application number: CN202022814821.2U
Authority: CN
Inventors: 王文辉
Original assignee: Shenzhen NYY Technology Co Ltd
Current assignee: Shenzhen NYY Technology Co Ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-08-10
Anticipated expiration: 2030-11-26

Abstract

The utility model discloses an dc-to-ac converter with modular structure belongs to dc-to-ac converter technical field, in particular to dc-to-ac converter with modular structure. This dc-to-ac converter includes that casing, BUS copper bar module, stromatolite are female arranges electric capacity module, IGBT power module, output three-phase copper bar module, BUS copper bar module, the female electric capacity module of arranging of stromatolite, IGBT power module, output three-phase copper bar module connect gradually, and equal fixed connection is in the casing. Firstly, the utility model discloses an inverter wholly adopts the modularized design, realizes the power moduleization, has improved the inverter reliability; secondly, the IGBT sampling board and the IGBT driving board of the inverter are arranged in a laminated mode, so that the occupied space of the IGBT power module can be effectively reduced; thirdly, the IGBT module is arranged right above the radiator and is close to the radiator, so that the whole IGBT power module can be reasonably radiated, and the radiating efficiency is improved; finally, the inverter is simple in overall structure, low in manufacturing cost and convenient to popularize and use.

Description

Inverter with modular structure

Technical Field

The utility model belongs to the technical field of the dc-to-ac converter, in particular to dc-to-ac converter with modular structure.

Background

The inverter is a converter which converts direct current electric energy (batteries and storage batteries) into constant-frequency constant-voltage or frequency-modulation voltage-regulation alternating current (generally 220V,50Hz sine wave). It is composed of inverter bridge, control logic and filter circuit. The multifunctional electric grinding wheel is widely applicable to air conditioners, home theaters, electric grinding wheels, electric tools, sewing machines, DVDs (digital video disks), VCDs (video recorders), computers, televisions, washing machines, range hoods, refrigerators, video recorders, massagers, fans, lighting and the like. In foreign countries, due to the higher popularization rate of automobiles, the inverter can be used for connecting the storage battery to drive electric appliances and various tools to work when going out for work or traveling.

Inverter product of traditional design is bulky, and many designs do not realize the power moduleization, and the regional copper bar overlap joint that passes through of bus capacitor leads to the product stray inductance great, and the reliability is lower.

The prior art discloses an inverter shell structure and an inverter with a patent number of CN201821594961. X. The inverter shell structure comprises a shell, wherein a containing cavity for containing components is formed in the shell, and heat dissipation protrusions and heat dissipation ribs are correspondingly and convexly arranged on the inner side face and the outer side face of at least one side wall of the shell. The heat dissipation is protruding mainly be used with establish with hold the laminating of the components and parts of intracavity, in order better will the heat that components and parts produced reaches on the casing be equipped with the heat dissipation muscle on the lateral surface of lateral wall, increased the area of contact of casing and air, further will heat conduction to the air on the casing in, and then will well the heat conduction that components and parts produced has better radiating effect to air on every side.

Although the inverter has a good heat dissipation effect, the overall structure is disordered and the reliability is low.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, a primary object of the present invention is to provide an inverter with a modular structure, wherein the inverter is integrally designed in a modular manner, so as to realize power modularization and improve reliability of the inverter;

another object of the present invention is to provide an inverter with a modular structure, which can effectively reduce the occupied space of the IGBT power module;

a final object of the present invention is to provide an inverter with modular structure, which is simple in structure, low in cost, and easy to popularize and use.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides an dc-to-ac converter with modular structure, this dc-to-ac converter include that casing, BUS copper bar module, stromatolite are female arranges electric capacity module, IGBT power module, output three-phase copper bar module and connect gradually, and equal fixed connection is in the casing.

Further, the BUS copper bar module comprises a BUS-copper bar and a BUS + copper bar, wherein the BUS-copper bar and the BUS + copper bar are arranged side by side and are fixedly connected with the laminated busbar capacitor module.

Furthermore, the laminated busbar capacitor module comprises a capacitor fixing frame, a laminated busbar, an IGBT absorption capacitor and a busbar capacitor, wherein the IGBT absorption capacitor and the capacitor fixing frame are both arranged above the laminated busbar and are both fixedly connected with the laminated busbar; the bus capacitor is fixedly connected to the capacitor fixing frame; the laminated busbar is fixedly connected with the IGBT power module. By adopting the laminated busbar design, the device can realize error-free installation, and increase more capacitors and smaller stray inductance.

Further, the IGBT power modules are provided with three groups, and the three groups of IGBT power modules are arranged in the shell side by side.

Furthermore, the IGBT power module comprises an IGBT module and a radiator, wherein the IGBT module is arranged above the radiator and is fixedly connected with the radiator; an air outlet device is arranged at the bottom of the radiator, and the air outlet direction is from bottom to top. Adopt the bottom mode of blowing, the hotter IGBT module of power that makes cold wind blow at first, can be more reasonable dispel the heat to whole IGBT power module, improved the radiating efficiency.

Further, the IGBT power module further comprises an IGBT bus bar, and the IGBT bus bar is fixedly connected with the IGBT module and fixedly connected with the output three-phase copper bar module.

Furthermore, the radiator comprises a base and more than one radiating teeth, the base and the radiating teeth are integrally formed, and the radiating teeth are parallel to each other and have the same interval. The radiator has no problem of interface impedance and has excellent radiating effect.

Further, the radiator is made of aluminum material.

Furthermore, the number of the IGBT modules is two, and the two IGBT modules are arranged side by side and fixedly connected to the left side and the right side of the radiator respectively.

Further, the IGBT power module is still including IGBT sampling board, IGBT sampling board range upon range of setting in IGBT module top to be connected with IGBT module contact pin.

Further, the IGBT power module is still including the IGBT drive board, the IGBT drive board stacks and sets up IGBT sampling board top to be connected with IGBT sampling board contact pin.

Furthermore, the IGBT module, the IGBT sampling plate and the IGBT driving plate are connected through a contact pin, so that the disassembly and the maintenance are convenient, and the IGBT sampling plate and the IGBT driving plate are arranged above the IGBT module in a stacking manner, so that the occupied space of the IGBT power module can be effectively saved, the overall size is reduced, and the assembly difficulty is reduced; meanwhile, the reliability of the inversion module can be improved, and the system cost is reduced.

Further, output three-phase copper bar module includes copper bar A looks, copper bar B looks, copper bar C looks, copper bar A looks, copper bar B looks, copper bar C are arranged mutually, and all with IGBT busbar fixed connection.

The utility model has the advantages that: compared with the prior art, firstly, the inverter of the utility model adopts the modularized design as a whole, realizes the power modularization and improves the reliability of the inverter; secondly, the IGBT sampling board and the IGBT driving board of the inverter are arranged in a laminated mode, so that the occupied space of the IGBT power module can be effectively reduced; thirdly, the IGBT module is arranged right above the radiator and is close to the radiator, so that the whole IGBT power module can be reasonably radiated, and the radiating efficiency is improved; finally, the inverter is simple in overall structure, low in manufacturing cost and convenient to popularize and use.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the present invention without a housing;

fig. 3 is a schematic structural diagram of the IGBT power module of the present invention;

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

referring to fig. 1-3, in order to achieve the above purpose, the technical solution of the present invention is as follows:

the utility model provides an inverter with modular structure, this inverter include that casing 1, BUS copper bar module 2, stromatolite are female to be arranged electric capacity module 3, IGBT power module 4, output three-phase copper bar module 5 and connect gradually, and equal fixed connection is in casing 1.

In this embodiment, the BUS copper bar module 2 includes a BUS-copper bar 21 and a BUS + copper bar 22, the BUS-copper bar 21 and the BUS + copper bar 22 are arranged side by side and are all fixedly connected with the laminated busbar capacitance module 3.

In this embodiment, the laminated busbar capacitor module 3 includes a capacitor fixing frame 31, a laminated busbar 32, an IGBT absorption capacitor 33, and a busbar capacitor 34, where the IGBT absorption capacitor 33 and the capacitor fixing frame 31 are both disposed above the laminated busbar 32 and are both fixedly connected to the laminated busbar 32; the bus capacitor 34 is fixedly connected to the capacitor fixing frame 31; the laminated busbar 32 is fixedly connected with the IGBT power module 4. By adopting the laminated busbar design, the device can realize error-free installation, and increase more capacitors and smaller stray inductance.

In the present embodiment, the IGBT power modules 4 are provided with three groups, and the three groups of IGBT power modules 4 are arranged side by side in the housing 1.

In this embodiment, the IGBT power module 4 includes an IGBT module 41 and a heat sink 42, where the IGBT module 41 is disposed above the heat sink 42 and is fixedly connected to the heat sink 42; an air outlet device (not shown) is disposed at the bottom of the heat sink 42, and the air outlet direction is from bottom to top. Adopt the bottom mode of blowing, the hotter IGBT module 41 of power that makes cold wind blow at first, can be more reasonable dispels the heat to whole IGBT power module 4, has improved the radiating efficiency.

In this embodiment, the IGBT power module 4 further includes an IGBT bus bar 43, and the IGBT bus bar 43 is fixedly connected to the IGBT module 41 and is fixedly connected to the output three-phase copper bar module 5.

In this embodiment, the heat sink 42 includes a base 421 and at least one heat dissipation tooth 422, the base 421 and the heat dissipation tooth 422 are integrally formed, and the heat dissipation teeth 422 are parallel to each other and have the same distance therebetween. The radiator has no problem of interface impedance and has excellent radiating effect.

In the present embodiment, the heat sink 42 is made of an aluminum material. Has the advantage of fast heat dissipation.

In this embodiment, two IGBT modules 41 are provided, and the two IGBT modules 41 are arranged side by side and fixedly connected to the left and right sides of the heat sink 42, respectively.

In this embodiment, the IGBT power module 4 further includes an IGBT sampling plate 44, and the IGBT sampling plate 44 is stacked above the IGBT module 41 and is connected to the IGBT module 41 by a pin.

In this embodiment, the IGBT power module 4 further includes an IGBT drive board 45, and the IGBT drive board 45 is stacked above the IGBT sampling board 44 and is connected to the IGBT sampling board 44 by a pin.

In the embodiment, the IGBT module 41, the IGBT sampling plate 44 and the IGBT drive plate 45 are connected by pins, so that the disassembly and the maintenance are convenient, and the IGBT sampling plate 44 and the IGBT drive plate 45 are stacked above the IGBT module 41, so that the occupied space of the IGBT power module 4 can be effectively saved, the overall size is reduced, and the assembly difficulty is reduced; meanwhile, the reliability of the inversion module can be improved, and the system cost is reduced.

In this embodiment, output three-phase copper bar module 5 includes copper bar A looks 51, copper bar B looks 52, copper bar C looks 53, copper bar A looks 51, copper bar B looks 52, copper bar C looks 53 set up side by side, and all with IGBT busbar 43 fixed connection.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An inverter with a modular structure is characterized in that the inverter comprises a shell, a BUS copper bar module, a laminated BUS capacitor module, an IGBT power module and an output three-phase copper bar module,

BUS copper bar module, female capacitor module, IGBT power module, the output three-phase copper bar module of arranging of stromatolite connect gradually, and equal fixed connection is in the casing.

2. The inverter of claim 1, wherein the BUS copper bar module comprises a BUS-copper bar and a BUS + copper bar, and the BUS-copper bar and the BUS + copper bar are arranged side by side and are fixedly connected with the laminated busbar capacitor module.

3. The inverter with the modular structure according to claim 1, wherein the laminated busbar capacitor module comprises a capacitor fixing frame, a laminated busbar, an IGBT absorption capacitor and a busbar capacitor, wherein the IGBT absorption capacitor and the capacitor fixing frame are both arranged above the laminated busbar and are both fixedly connected with the laminated busbar; the bus capacitor is fixedly connected to the capacitor fixing frame; the laminated busbar is fixedly connected with the IGBT power module.

4. The inverter with modular structure as claimed in claim 1, wherein said IGBT power modules are arranged in three groups, said three groups of IGBT power modules being arranged side by side in a housing.

5. The inverter with the modular structure as claimed in claim 4, wherein the IGBT power module comprises an IGBT module and a heat sink, the IGBT module is arranged above the heat sink and is fixedly connected with the heat sink; an air outlet device is arranged at the bottom of the radiator, and the air outlet direction is from bottom to top.

6. The inverter with modular structure as claimed in claim 5, wherein said IGBT power module further comprises an IGBT bus bar fixedly connected with the IGBT module and fixedly connected with the output three-phase copper bar module.

7. The inverter of claim 5, wherein the heat sink comprises a base and at least one heat dissipation tooth, the base and the heat dissipation tooth are integrally formed, and the heat dissipation teeth are parallel to each other and have the same distance therebetween.

8. The inverter with modular structure as claimed in claim 5, wherein there are two IGBT modules, and the two IGBT modules are arranged side by side and fixedly connected to the left and right sides of the heat sink.

9. The inverter with the modular structure as claimed in claim 5, wherein the IGBT power module further comprises an IGBT sampling plate and an IGBT driving plate, the IGBT sampling plate is stacked above the IGBT module and connected with the IGBT module pins; the IGBT drive board is stacked above the IGBT sampling board and is connected with the IGBT sampling board through a contact pin.

10. The inverter of claim 5, wherein the output three-phase copper bar module comprises a copper bar A phase, a copper bar B phase and a copper bar C phase, and the copper bar A phase, the copper bar B phase and the copper bar C phase are arranged in parallel and are all fixedly connected with the IGBT bus bar.