CN202713173U - Inverter power module - Google Patents

Abstract

The utility model discloses an inverter power module, which comprises a switch tube component, a capacitor pool component connected with the switch tube component, and an air-cooled component for cooling the switch tube component; the capacitor pool component is used for placing a DC support Capacitor, the air-cooled assembly includes a cooling fan and a radiator, and the switch tube assembly is fixedly connected to the radiator to form a switch tube module box. The inverter power module structure of the utility model, when on-site maintenance is required, only needs to disassemble the switch tube module box, and a single person can complete the operation, which effectively reduces the difficulty of maintenance; multiple switch tube modules Sharing a radiator effectively utilizes the cabinet space; both the switch tube module busbar and the capacitor pool busbar are laminated and laminated, which can effectively reduce the parasitic inductance of the busbar; the side-by-side installation direction of the switch tube modules is perpendicular to the wind direction, shortening the wind The length of the track is good for heat dissipation.

Description

A kind of inverter power module

technical field

The utility model relates to an inverter power module.

Background technique

Photovoltaic grid-connected power generation technology is an important part of the development of renewable energy technology. In recent years, it has also achieved rapid development and achieved many technological breakthroughs, but there are still some shortcomings. At present, especially in the application of high-power grid-connected inverter power supply, the structure of the core of the inverter device: the power module is getting more and more compact, and the volume is getting smaller and smaller, so that the power density of the inverter, especially the power module part The power density is getting higher and higher, requiring the power module to have a good heat dissipation structure. In order to facilitate on-site maintenance, a modular design is required for the vulnerable IGBT modules and capacitor modules in the inverter. In the existing high-power photovoltaic inverter system, the IGBT module, capacitor module, fan and radiator components of the inverter are integrated into one power module, which leads to a large volume of the entire module and requires a large At the same time, the weight of the whole module is very large, which may exceed 50-60Kg, which brings great difficulties to the later maintenance.

Contents of the invention

The purpose of the utility model is to provide an inverter power module which is convenient for later maintenance and disassembly, has high heat dissipation efficiency and takes up little space in the overall cabinet.

The inverter power module of the utility model includes a switch tube component, a capacitor pool component connected with the switch tube component, and an air-cooled component for cooling the switch tube component; the capacitor pool component is used to place a DC support capacitor, and the wind The cold component includes a cooling fan and a radiator, and the switch tube assembly is fixedly connected with the radiator to form a switch tube module box.

The air-cooled assembly also includes a heat dissipation air duct, the radiator is located in the heat dissipation air duct, the heat dissipation air duct is provided with an air inlet and an air outlet, and the fan is arranged at the air outlet.

The air cooling assembly also includes an air outlet deflector located at the air outlet of the heat dissipation air duct.

The switching tube assembly includes a switching tube busbar and at least one switching tube module located on the switching tube busbar.

The switch tube bus is provided with three switch tube modules arranged side by side, and the direction of the side by side arrangement is perpendicular to the wind direction of the cooling air duct.

The switch tube assembly is connected to the capacitor pool assembly through the switch tube busbar and the capacitor pool busbar.

Both the switch tube busbar and the capacitor pool busbar are laminated press-fitted busbars.

The switching tube busbar and the capacitor pool busbar are connected by screw fasteners.

The air-cooling assembly also includes a mounting plate, and the fan, the cooling air duct and the deflector are fixed on the mounting plate.

The switch tube assembly also includes several DC support capacitors.

The switch tube described in the utility model can be an IGBT tube, a MOSFET tube, an IGCT tube or an IEGT tube, the switch tube component can be an IGBT component, a MOSFET component, an IGCT component or an IEGT component, and the switch tube module can be an IGBT module , MOSFET module, IGCT module, IEGT module or other types of switch tube modules.

The advantages of the inverter power module structure of the present invention are:

1. For the inverter power module structure of the present utility model, when on-site maintenance is required, it is only necessary to disassemble the switch tube module box weighing 30-40Kg, and a single person can complete the operation. Effectively reduces maintenance difficulty.

2. Multiple switching tube modules share one radiator, effectively utilizing the cabinet space.

3. The parallel direction of multiple switching tube modules is perpendicular to the direction of the air duct, the air duct is short, the wind resistance is small, and the heat dissipation efficiency is high.

4. Both the switch tube module busbar and the capacitor pool busbar of the switch tube module are laminated and laminated, which can effectively reduce the parasitic inductance of the busbar.

Description of drawings

Fig. 1 is the structural representation of the preferred embodiment of the utility model;

Fig. 2 is a schematic diagram of the front view of Fig. 1;

Fig. 3 is a left view structure of Fig. 1 and a schematic diagram of heat dissipation of a preferred embodiment;

Fig. 4 is the structural representation of the IGBT module box in the preferred embodiment of the utility model;

In the figure: 1. Capacitor pool assembly; 2. IGBT module box; 3. Cooling air duct; 4. Deflector; 5. Capacitor pool busbar; 6. DC support capacitor; 7. Capacitor pool mounting plate; Screw; 9. Cooling fan; 10. IGBT module box frame; 11. IGBT module; 12. Radiator; 13. Air cooling component; 14. IGBT bus bar;

Detailed ways

As shown in Figures 1-4, the preferred embodiment of the inverter power module of the present invention includes an IGBT assembly, a capacitor pool assembly 1 connected to the IGBT assembly, and an air-cooled assembly 13 for dissipating heat from the IGBT assembly; wherein, the IGBT The assembly includes an IGBT bus bar 14 and three IGBT modules 11 arranged side by side on the IGBT bus bar, the direction of which is arranged side by side is perpendicular to the wind direction of the cooling air duct 3, and the three IGBT modules 11 are installed side by side through the IGBT bus bar 14 On the radiator 12, the cabinet space is effectively utilized, and the side-by-side installation direction is perpendicular to the wind direction of the air duct shown in Figure 3, so that the air duct is shorter, the wind resistance generated is small, and the heat dissipation efficiency is high; Air duct 3, heat dissipation fan 9 and a radiator 12, the radiator 12 is located in the heat dissipation air duct 3, and the heat dissipation air duct 3 is provided with an air inlet and an air outlet, and the heat dissipation fan 9 is arranged at the air outlet; the IGBT assembly and the radiator 12 is fixedly connected to form the IGBT module box 2, the IGBT assembly is arranged in the IGBT module box frame 10, the radiator is fixed on the IGBT module box frame 10, and the IGBT module box frame 10 is also fixed with the cooling air duct 3; at the same time, The air-cooled assembly also includes an air outlet deflector 4 positioned at the air outlet of the cooling air duct 3 and a mounting plate 15, the cooling fan 9, the cooling air duct 3 and the deflector 4 are fixed on the mounting plate 15, and the radiator 12 Fixedly connected to the IGBT bus bar 14; the IGBT assembly and the capacitor pool assembly 1 are connected by the screw fasteners on the IGBT bus bar 14 and the capacitor pool bus bar 5, and the IGBT bus bar 14 and the capacitor pool bus bar 5 are laminated and pressed bus bars; further Yes, in the IGBT module box frame 10, the IGBT module 11 is directly connected to the DC support capacitor 16. In order to reduce the weight of the IGBT module box 2 and facilitate maintenance, a separate capacitor pool assembly 1 is set up to store all the DC support capacitors, as shown in the figure As shown in 4, the DC support capacitor can also be divided into two parts, one part is placed in the capacitor pool assembly 1, and the other part is placed in the switch tube assembly, which can effectively reduce the weight of the IGBT module box 2 and enhance electrical stability. . In the utility model, both the IGBT bus bar 14 and the capacitor pool bus bar 5 adopt laminated press-fitted bus bars, which have relatively small parasitic inductance. The capacitor pool is disassembled, which is light in weight and easy to operate; the capacitor pool busbar 5 and the IGBT busbar are connected by the pressure riveting screws 8 on the capacitor pool busbar 5 to form a large laminated laminated busbar, and the capacitor pool assembly 1 is respectively fixed by bolts at both ends On the capacitor pool bus bar 5 and the capacitor pool mounting plate 7, the capacitor pool mounting plate 7 is fixed in the cabinet by bolts. The DC support capacitor of the IGBT module in the utility model can be divided into two parts, one part is placed in the capacitor pool, and the other part is placed in the detachable IGBT module box 2, which effectively reduces the weight of the IGBT module box 2 that needs to be disassembled and maintained; The IGBT busbar and the capacitor pool busbar are connected by riveting screw fasteners to form a large laminated laminated busbar; three IGBT modules share a heat sink to effectively use the space; the side-by-side installation direction of the IGBT modules is perpendicular to the wind direction, shortening the The length of the air duct is conducive to heat dissipation.

Claims (10)

1. An inverter power module, characterized in that: it includes a switch tube assembly, a capacitor pool assembly connected to the switch tube assembly, and an air-cooled assembly for cooling the switch tube assembly; the capacitor pool assembly is used to place a DC support Capacitor, the air-cooled assembly includes a heat dissipation fan and a radiator, and the switch tube assembly is fixedly connected with the radiator to form a switch tube module box. 2. The inverter power module according to claim 1, characterized in that: the air-cooled assembly further includes a heat dissipation air duct, the radiator is located in the heat dissipation air duct, and the heat dissipation air duct is provided with an air inlet and an air outlet The air outlet, the fan is arranged at the air outlet. 3 . The inverter power module according to claim 1 , wherein the air cooling assembly further comprises an air outlet deflector located at the air outlet of the heat dissipation air duct. 4 . 4 . The inverter power module according to claim 1 , wherein the switching tube assembly comprises a switching tube bus bar and at least one switching tube module located on the switching tube bus bar. 5 . The inverter power module according to claim 4 , wherein three switch tube modules are arranged side by side on the switch tube bus, and the direction of the side by side arrangement is perpendicular to the wind direction of the cooling air duct. 5 . 6 . The inverter power module according to claim 1 , wherein the switch tube assembly and the capacitor pool assembly are connected through a switch tube bus bar and a capacitor pool bus bar. 7 . 7 . The inverter power module according to claim 6 , wherein the switch tube busbar and the capacitor pool busbar are laminated laminated busbars. 8 . 8. The inverter power module according to claim 6 or 7, characterized in that: the switch tube busbar and the capacitor pool busbar are connected by screw fasteners. 9 . The inverter power module according to claim 1 , wherein the air cooling assembly further comprises a mounting plate, and the fan, the heat dissipation air duct and the deflector are fixed on the mounting plate. 10 . 10. The inverter power module according to claim 1, wherein the switch tube assembly further comprises several DC supporting capacitors.

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