CN216904684U

CN216904684U - Power unit with high protection, low cost and high power density

Info

Publication number: CN216904684U
Application number: CN202220411927.4U
Authority: CN
Inventors: 孙夫纯; 邵景红; 吴建华; 姬脉胜; 亢丽平
Original assignee: Windsun Science and Technology Co Ltd
Current assignee: Windsun Science and Technology Co Ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-07-05
Anticipated expiration: 2032-02-28

Abstract

The utility model relates to a power unit with high protection, low cost and high power density, which comprises a unit shell; the unit shell is internally provided with a capacitor assembly, an IGBT module assembly and a unit control board in sequence from top to bottom, the upper side surface and the lower side surface of the unit shell are respectively provided with a direct current input terminal and an alternating current output terminal, the direct current input terminal is connected with the alternating current output terminal through the IGBT module assembly, and the unit control board controls the IGBT module assembly to realize the inversion work from direct current to alternating current; the lower side surface of the unit shell is provided with a power line plug and a light plug. The power unit formed by the power unit is compact, and the power density of the power unit is improved; the insulating guard plate is arranged on the periphery of the unit control plate, so that the protection grade of the power unit is improved. Through set up the heat dissipation net on the radiator, realized the good heat dissipation to IGBT module component, guaranteed its life.

Description

Power unit with high protection, low cost and high power density

Technical Field

The present invention relates to a power unit, and more particularly, to a power unit with high protection, low cost, and high power density.

Background

With the increasingly stringent requirements of the rail transit industry on the application environment of power electronic products, the rail transit industry needs to bear the invasion of environmental factors such as high temperature and high humidity on site, and various fault problems occur on field equipment, so that the requirement on the adaptability of the environment is higher and higher, and the electronic products with high protection and high reliability are a development trend. Meanwhile, the cost is also an important measurement index of the product, in recent years, the competition situation of the product price is more and more obvious, and the product market with high cost performance is relatively short. The products with high power density are relatively few, and the aims of saving the field space as much as possible, reducing the cost and improving the power density are fulfilled. The high-power device is adopted, and the purposes of reducing the volume, increasing the power density and reducing the cost are achieved by fully utilizing the space and reasonably arranging the structure.

Disclosure of Invention

The present invention provides a power unit with high protection, low cost and high power density to overcome the disadvantages of the above technical problems.

The utility model relates to a power unit with high protection, low cost and high power density, which comprises a unit shell, wherein the unit shell is internally provided with a containing cavity; the method is characterized in that: the unit shell is internally provided with a capacitor assembly, an IGBT module assembly and a unit control board from top to bottom in sequence, the upper side surface and the lower side surface of the unit shell are respectively provided with a direct current input terminal and an alternating current output terminal, the direct current input terminal is connected with the alternating current output terminal through the IGBT module assembly, and the unit control board controls the IGBT module assembly to realize the inversion work from direct current to alternating current; the lower side of the unit shell is provided with a power line plug for supplying power to the unit control panel and a light plug for communicating with the unit control panel.

According to the power unit with high protection, low cost and high power density, the back and the periphery of the back of the unit shell are provided with the radiator guard plates, the radiator for radiating the IGBT module assembly is arranged in the radiator guard plates, and the upper side, the lower side and the back of the radiator guard plates are provided with the radiating grids for realizing air convection.

According to the high-protection, low-cost and high-power-density power unit, the insulating protective plate for providing the protection grade of the power unit is arranged on the periphery of the unit control plate.

The power unit with high protection, low cost and high power density is characterized in that two unit handles are arranged on the lower side surface of the unit shell.

The utility model has the beneficial effects that: according to the power unit, the capacitor assembly, the IGBT module assembly and the control unit are sequentially arranged in the accommodating cavity of the unit shell from top to bottom, so that the formed power unit is compact, and the power density of the power unit is improved; furthermore, the insulating protective plate is arranged on the periphery of the unit control board, so that the protection grade of the power unit is effectively improved.

Furthermore, the back of the unit shell is provided with the radiator and the radiator guard plate, and the upper side face, the lower side face and the back side face of the radiator are provided with the radiating grids, so that air can flow in the radiator guard plate under the action of the radiator, the radiating of the IGBT module assembly is effectively realized, and the service life of the IGBT module assembly is ensured.

Compared with the prior art, the method has the advantages that:

1. high protection level and strong environmental adaptability. The power unit has high protection level (can reach IP 65), can meet the application environment requirements of the rail transit industry on power electronic products, reduces the product quality problems caused by environmental factors, reduces the failure rate, and improves the reliability and stability of the product.

2. The power density is high. The unit adopts a high-power device, the space is fully utilized, the structure is reasonably arranged, the power density is increased, the volume of the unit is reduced, the purpose of increasing the power density is achieved, and the power density increasing device is particularly suitable for a site with limited space.

3. The assembly efficiency is high, and the cost is low. The shell is made of aluminum alloy die pieces, the external interfaces are nested by the die pieces, the overall processing and manufacturing cost of the unit structural piece is reduced, the assembly efficiency is obviously improved, and the aluminum alloy die is suitable for automation or assembly line operation requirements. The assembly efficiency is greatly improved, and the assembly time and labor cost are greatly reduced.

Drawings

FIG. 1 is a front view of a power unit of the present invention;

FIG. 2 is a rear view of the power unit of the present invention;

FIG. 3 is a left side view of the power unit of the present invention;

FIG. 4 is a right side view of the power unit of the present invention;

FIG. 5 is a top view of a power cell of the present invention;

FIG. 6 is a bottom view of the power unit of the present invention;

FIG. 7 is a perspective view of a power unit of the present invention;

fig. 8 is a circuit schematic of the power cell of the present invention.

In the figure: 1 unit casing, 2 electric capacity subassemblies, 3 IGBT module subassembly, 4 unit control panels, 5 direct current input terminal, 6 exchange output terminal, 7 insulating backplate, 8 radiator backplate, 9 power cord plugs, 10 optical fiber plug, 11 unit handle, 12 heat dissipation grids.

Detailed Description

The utility model is further described with reference to the following figures and examples.

As shown in fig. 1 to fig. 7, a front view, a rear view, a left view, a right view, a top view, a bottom view and a perspective view of the high-protection, low-cost and high-power-density power unit of the present invention are respectively given, the power unit is composed of a unit housing 1, a capacitor assembly 2, an IGBT module assembly 3, a unit control board 4, a dc input terminal 5, an ac output terminal 6, a heat sink protective plate 8, a power line plug 9 and a light line plug 10, the unit housing 1 plays a role of fixing and supporting, and the inside of the unit housing 1 is a receiving cavity. The capacitor assembly 2, the IGBT module assembly 3 and the unit control board 4 are sequentially arranged in the accommodating cavity of the unit shell 1, so that the formed power unit is compact, and the power unit is ensured to have high power density.

The direct current input terminal 5 is arranged on the upper side surface of the unit shell 1, and the direct current input terminal 5 penetrates through the unit shell 1 and then is connected with the direct current input end of the IGBT module component 3; alternating current output terminal 6 is arranged on the lower side surface of unit housing 1, and alternating current output terminal 6 is connected with the output end of IGBT module component 3 after penetrating through unit housing 1. The unit control board 4 controls the IGBT module assembly 3 to perform an inversion operation from dc to ac.

Radiator guard plates 8 are arranged on the back and the periphery of the back of the unit shell 1, and a radiator for radiating the IGBT module assembly 3 is arranged in the radiator guard plates 8. Heat dissipation net 12 has all been seted up to the last side, downside and the back of radiator backplate 8, and the purpose of setting up heat dissipation net 12 is the realization air convection. Like this, under the drive of radiator, can realize the air flow of outside air in radiator backplate 8 to guarantee to the good heat dissipation of IGBT module component 3, ensure that IGBT module component satisfies the life requirement.

A power cord plug 9 and an optical fiber plug 10 are shown provided on the lower side of the unit case 1, the power cord plug 9 being used to realize power supply to the unit control board 4, and communication with the unit control board 5 is realized via the optical fiber plug 10. The periphery of the unit control board 4 is provided with an insulating protective board 7, and the voltage protection grade of the whole power unit is improved due to the arrangement of the insulating protective board 7. The lower surface of the illustrated unit housing 1 is provided with two unit handles 11, and since the unit housing 1 is placed on a shelf in a horizontal state when in use, the power unit can be conveniently inserted and pulled out by holding the unit handles 11 by hand, which facilitates inspection and maintenance of the power unit.

As shown in fig. 8, a schematic circuit diagram of the power unit of the present invention is shown, the a-phase, B-phase and C-phase inverter circuits are each composed of two IGBT modules, the input terminal of the dc power supply and the input terminal of each phase inverter circuit are connected to capacitors, and the junction of the two IGBT modules in the same phase inverter circuit forms the output terminal of the inverted three-phase ac power supply.

During the use, fix IGBT module component 3 through the radiator, then install electric capacity subassembly 2 in the unit casing, again install unit control panel 4 on insulating barrier 7, whole install again on unit casing 1, install on unit casing 1 direct current input terminal 5, interchange output terminal 6, unit handle 11, optic fibre plug 10, power cord plug 9, radiator backplate 8 on the unit casing 1 constitutes high protection's contravariant unit. The connecting part of the radiator air duct and the unit shell 1 is completely isolated, so that the sealing effect is achieved, and the requirement of high protection level is met.

Claims

1. A high protection, low cost and high power density power unit comprises a unit housing (1) with a receiving cavity inside; the method is characterized in that: the unit shell is internally provided with a capacitor assembly (2), an IGBT module assembly (3) and a unit control board (4) from top to bottom in sequence, the upper side surface and the lower side surface of the unit shell are respectively provided with a direct current input terminal (5) and an alternating current output terminal (6), the direct current input terminal (5) is connected with the alternating current output terminal (6) through the IGBT module assembly (3), and the unit control board (4) controls the IGBT module assembly (3) to realize the inversion work from direct current to alternating current; the lower side surface of the unit shell (1) is provided with a power line plug (9) for supplying power to the unit control panel and a light plug (10) communicated with the unit control panel.

2. The high protection, low cost and high power density power cell of claim 1, wherein: the back of unit casing (1) and be provided with radiator backplate (8) around the back, be provided with in radiator backplate (8) to the radiating radiator of IGBT module component (3), the last side, downside and the back of radiator backplate all are provided with heat dissipation net (12) that realize the air convection.

3. A high protection, low cost and high power density power unit according to claim 1 or 2, characterized in that: and an insulating protective plate (7) for providing a power unit protection grade is arranged on the periphery of the unit control board (4).

4. A high protection, low cost and high power density power unit according to claim 1 or 2, characterized in that: two unit handles (11) are arranged on the lower side surface of the unit shell (1).