CN214707492U

CN214707492U - Core structure of small-size low-voltage frequency converter

Info

Publication number: CN214707492U
Application number: CN202120351067.5U
Authority: CN
Inventors: 张树林; 郑友斌; 罗军
Original assignee: Hope Senlan Science & Technology Corp ltd
Current assignee: Hope Senlan Science & Technology Corp ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2021-11-12
Anticipated expiration: 2031-02-08

Abstract

The utility model relates to a novel small-size low-voltage frequency converter core structure, which is divided into an upper layer, a middle layer and a lower layer, wherein a fan, a radiator and a filter capacitor module which are arranged in the lower layer structure are designed by independent air channels; the design reduces the working temperature of components, improves the performance of the machine core and prolongs the service life of the machine core. The middle layer structure is set as a charging resistor, the rectifier bridge, the insulated gate bipolar transistor IGBT and the control panel module device are arranged, the space design of the device arrangement structure is compact, the electrical primary loop connection distance is short, and the devices are connected through cables, aluminum bars or copper bars. The upper layer structure is that PCB board and input/output binding post installation, and PCB board arrangement and components and parts connection distance are short. The core structure is easy to install and operate, and convenient to disassemble and maintain; the whole structure of the machine core is compact, the volume of the machine core is smaller than that of the traditional frequency converter, and the weight and the cost are lower.

Description

Core structure of small-size low-voltage frequency converter

Technical Field

The utility model relates to a novel low-voltage inverter structure device in power electronic equipment.

Background

With the progress of science and technology, the motor frequency conversion control technology is widely applied to the fields of machinery, agriculture, electric power, logistics, buildings and the like. The low-voltage frequency converter is composed of components such as rectification, filtering, inversion and the like of a power electronic device, and the structural design of the low-voltage frequency converter directly influences the installation, maintenance, size and cost; the heat dissipation technology of the components directly influences the performance and the service life of the whole machine.

In the prior art, the main loops of components such as rectification, filtering, inversion and the like of most power devices are realized in a copper bar or aluminum bar connection mode; female arranging is walked the line complicacy, and the distance of arranging is far away between components and parts, and filter capacitor monomer installation leads to the volume to be on the large side, with high costs and the quality is heavy simultaneously, and assembly procedure is complicated difficult, and it wastes time and energy to maintain the dismantlement.

Disclosure of Invention

The to-be-solved technical problem of the utility model lies in that to above-mentioned low-voltage inverter core volume big partially, with high costs and the quality heavy, maintain inconvenient problem, provide a small, with low costs and light in weight, maintain convenient low-voltage inverter core.

The technical scheme adopted by the utility model for solving the technical problems is to provide a small-size low-voltage frequency converter core structure, which comprises a sheet metal shell and components, wherein a bottom plate 8 and a middle partition plate 3 of the sheet metal shell are riveting components; the component includes: the device comprises a fan 17, a rectifier module 9, an insulated gate bipolar transistor IGBT13, a filter capacitor module 11, a laminated busbar 10, a relay PCB 12, an absorption PCB 1, a drive PCB 7, a power supply PCB 6, a charging resistor 16, a connecting terminal 4 and a cable, an aluminum bar or a copper bar; the air conditioner is characterized in that the machine core structure is divided into an upper layer, a middle layer and a lower layer, the lower layer structure is designed into an independent air channel, and the independent air channel is provided with components with high working temperature, such as a fan 17, a radiator 14, a filter capacitor module 11 and the like; the middle layer structure is arranged by components, and the arranged components comprise a rectifier module 9, an insulated gate bipolar transistor IGBT13 and a relay PCB 12; the upper layer structure is arranged by a PCB and a wiring terminal 4, wherein the PCB comprises a driving PCB 7, a power supply PCB 6 and an absorption PCB 1.

As a further improvement of the utility model, the heat dissipation mode is air draft, and the fan 17 is fixed on the fan mounting plate 15; the radiator 14 is arranged at the air inlet end of the fan 17 in the independent air duct and is fixed on the middle partition plate 3; the filter capacitor module 11 is placed at the air inlet end of the radiator 14 in the independent air duct and fixed on the middle partition plate 3 at the air inlet end position in the air duct, a filter capacitor module abdicating hole is formed in the middle partition plate, and the two thirds part of the filter capacitor is positioned in the air inlet end of the independent air duct.

As a further improvement of the utility model, the charging resistor 16 is fixed at the right position of the upper end of the middle clapboard 3; the rectifier module 9 is fixed on a mounting surface at the left end of the radiator 14 close to the air outlet end of the radiator 14; the insulated gate bipolar transistor IGBT13 is fixed on the installation surface of the air inlet end of the radiator; the relay PCB 12 is fixed on the middle partition board 3 between the filter capacitor module 11 and the IGBT13 at the right middle position.

As a further improvement of the present invention, the driving PCB 7 is fixed on the mounting plate at the positions of the rectifier module 9 and the charging resistor 16; the power supply PCB 6 is fixed on the mounting plate beside the lower end of the right side of the drive PCB 7; the absorption PCB 1 is fixed to an input aluminum or copper member 2.

As a further improvement of the present invention, the main circuit of the absorption PCB 1 is fixed on the input aluminum or copper member and connected to the left bracket of the box.

As a further improvement of the present invention, the laminated busbar 10 is fixed on the IGBT13 and the rectifier module 9.

As a further improvement, the wiring terminal 4 is fixed on the top of the filter capacitor module 11, and the wiring terminal 4 is connected with the device through a cable, an aluminum bar or a copper bar.

Drawings

Fig. 1 is the structural upper-layer schematic diagram of the small-sized low-voltage frequency converter core of the utility model.

Fig. 2 is the utility model discloses the independent wind channel internal structure of small volume low-voltage inverter core arranges the schematic diagram.

Fig. 3 is the utility model discloses little volume low-voltage inverter core middle level, power module and filter capacitor module arrange the sketch map.

Fig. 4 is the heat dissipation mode schematic diagram of the small-sized low-voltage inverter core structure of the present invention.

Detailed Description

In order to make the technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the invention.

As shown in the schematic diagram of fig. 1, it is the utility model discloses the upper strata of little volume low-voltage inverter core structure, each PCB board is connected with components and parts and adopts cable, aluminium row or copper bar to be connected. The upper layer of the movement is mainly provided with a PCB (printed Circuit Board) for connection and a wiring terminal for arrangement, the upper end of the upper layer is provided with a driving PCB (7), the driving PCB (7) is arranged at the top end of a rectifier module (9), the arrangement reduces the distance between the driving PCB (7) and an Insulated Gate Bipolar Transistor (IGBT) (13), the length of a driving cable is reduced, the working performance of the Insulated Gate Bipolar Transistor (IGBT) (13) is effectively improved, and the cost of the cable is reduced. An absorption PCB (1) is arranged on the upper input copper bar or aluminum bar (2), a main loop of the absorption PCB (1) is fixed on the input three-phase aluminum bar or copper bar (2), and a grounding end of the absorption PCB is fixed on a bracket on the left side of the box body, so that the arrangement and the connection are convenient, reliable and easy to operate; the upper-layer output three-phase copper bar or aluminum bar (5) is placed on the wiring terminal (4) on the right side; the lower extreme position on core upper strata has arranged binding post (4), is fixed in on the mounting panel, and this arrangement has improved the assembling nature of product.

As shown in the schematic diagram of fig. 2, the utility model discloses middle level and lower floor of little volume low-voltage inverter core structure, power module, PCB board and aluminium row or copper bar connection are mainly arranged to the middle level, and power module arranges on the installation face of radiator, and rectifier module (9) among the power module arranges on the installation face of the air-out end of radiator (14) left end, and this arrangement makes insulated gate bipolar transistor IGBT (13) interval increase, and the heat source is not concentrated, and the radiating effect is better; insulated gate bipolar transistor IGBT (13) among the power module arranges on the installation face of radiator air inlet end, and this arrangement has reduced the female range of arranging (10) to filter capacitor module (11) of stromatolite, has reduced the female area of arranging of stromatolite, has also reduced the female stray inductance of arranging of stromatolite simultaneously, has improved the performance of core. A relay PCB is arranged between the insulated gate bipolar transistor IGBT (13) and the filter capacitor module (11) in the middle layer, and the arrangement reduces the connection distance between the relay PCB and the laminated busbar (10) and the filter capacitor module (11). The lower layer is an independent air channel, a radiator (14), a fan (17) and a filter capacitor module (11) are arranged in the independent air channel, the radiator (14) is fixed on the middle partition plate (3), and the filter capacitor module (11) is fixed on the middle partition plate (3).

Through the independent air duct structural arrangement of above-mentioned lower floor, can effectual reduction high components and parts operating temperature of heat, can improve the performance and the life-span of core again, the installation and the maintenance of components and parts in can also being convenient for independent air duct.

Fig. 3 is a schematic diagram of the utility model discloses the middle level of little volume low-voltage inverter core, power module and filter capacitor module arrange the view.

Fig. 4 is a schematic diagram illustrating a heat dissipation method of a novel small-sized low-voltage inverter core.

It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. The protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A small-size low-voltage frequency converter core structure comprises a sheet metal shell and components, wherein a bottom plate (8) and a middle partition plate (3) of the sheet metal shell are riveting components; the component includes: the power supply circuit comprises a fan (17), a rectifier module (9), an insulated gate bipolar transistor IGBT (13), a filter capacitor module (11), a laminated busbar (10), a relay PCB (12), an absorption PCB (1), a drive PCB (7), a power supply PCB (6), a charging resistor (16), a wiring terminal (4) and a cable, an aluminum bar or a copper bar; the air conditioner is characterized in that the machine core structure is divided into an upper layer, a middle layer and a lower layer, the lower layer structure is designed into an independent air channel, and a fan (17), a radiator (14) and a filter capacitor module (11) which are arranged in the independent air channel are high-working-temperature components; the middle layer structure is arranged by components, and the arranged components comprise a rectifier module (9), an insulated gate bipolar transistor IGBT (13) and a relay PCB (12); the upper layer structure is arranged by a PCB and a wiring terminal (4), wherein the PCB comprises a driving PCB (7), a power supply PCB (6) and an absorption PCB (1).

2. The small-size low-voltage inverter core structure according to claim 1, characterized in that: the heat dissipation mode is air draft, and the fan (17) is fixed on the fan mounting plate (15); the radiator (14) is arranged at the air inlet end of the fan (17) in the independent air duct and is fixed on the middle partition plate (3); the filter capacitor module (11) is placed at the air inlet end of the radiator (14) in the independent air duct and is fixed on the middle partition plate (3) at the position of the air inlet end in the air duct, a filter capacitor module abdicating hole is formed in the middle partition plate, and the two thirds of the position of the filter capacitor is positioned in the air inlet end of the independent air duct.

3. The small-size low-voltage inverter core structure according to claim 1, characterized in that: the charging resistor (16) is fixed at the right position of the upper end of the middle partition plate (3); the rectifier module (9) is fixed on a mounting surface of the left end of the radiator (14) close to the air outlet end of the radiator (14); an insulated gate bipolar transistor IGBT (13) is fixed on the installation surface of the air inlet end of the radiator; the relay PCB (12) is fixed on the middle partition plate (3) between the filter capacitor module (11) and the insulated gate bipolar transistor IGBT (13) at the right middle position.

4. The small-size low-voltage inverter core structure according to claim 1, characterized in that: the driving PCB (7) is fixed on the mounting plate at the positions of the rectifier module (9) and the charging resistor (16); the power supply PCB (6) is fixed on the mounting plate beside the lower end of the right side of the drive PCB (7); the absorption PCB (1) is fixed on the input aluminum piece or the copper piece (2).

5. The small-size low-voltage inverter core structure according to claim 1, characterized in that: and the main loop of the absorption PCB (1) is fixed on the input aluminum piece or copper piece and is connected with the bracket on the left side of the box body in a grounding way.

6. The small-size low-voltage inverter core structure according to claim 1, characterized in that: the laminated busbar (10) is fixed on the insulated gate bipolar transistor IGBT (13) and the rectifying module (9).

7. The small-size low-voltage inverter core structure according to claim 1, characterized in that: the wiring terminal (4) is fixed on the top of the filter capacitor module (11), and the wiring terminal (4) is connected with the device through a cable, an aluminum bar or a copper bar.