CN204517672U - A kind of power layout structure of independent capacitance module - Google Patents

Abstract

A power layout structure of an independent capacitor module, mainly composed of a capacitor group and a plurality of power groups, the capacitor group includes a housing, a plurality of DC bus capacitor components installed in the housing, and multiple DC bus capacitor components are connected in parallel The main laminated busbar; the power group includes a chassis, a radiator fixed on the chassis, an IGBT module fixed on the radiator, and a branch laminated busbar connected to the IGBT module; the capacitor group is located in multiple Directly in front of the power group, multiple power groups and capacitor groups are connected through branch laminated busbars and main laminated busbars; this power layout structure effectively solves the problem of large volume, heavy weight, and Heat dissipation of modules and chassis, pre-product maintenance and cost reduction.

Description

A Power Layout Structure of Independent Capacitor Module

technical field

The utility model relates to a structural layout of a power module, in particular to a power layout structure of an independent capacitor module.

Background technique

Solar energy is an emerging green energy. Because it is clean, efficient, inexhaustible, and not limited by geographical resources, it has the advantages of safety, reliability, no noise, no pollution, less constraints, low failure rate, and easy maintenance. Widely used in various fields of social life, especially in photovoltaic grid-connected power station systems.

However, at present, for high-power photovoltaic grid-connected inverter devices, there are still many unreasonable places in the structural layout of the power part, such as poor heat dissipation, large and heavy modules, inconvenient installation and maintenance, and high module costs. , its main performance is as follows:

1. The heat dissipation performance of the power module and the box body is poor, and the poor heat dissipation performance will cause thermal breakdown of the switching power tube. When the temperature of the box body is too high, it will even reduce the performance of some components in the system, eventually causing the entire The system is unstable;

2. There are many devices installed in the power module, resulting in a single power module with large volume and heavy weight, which brings inconvenience to production installation and on-site maintenance.

3. The module layout is unreasonable and cannot meet the requirements of pre-product maintenance, which makes the maintenance process of the power part extremely complicated.

4. Due to the large volume and relatively complicated processing technology of the laminated busbar used in the power module, the cost of the busbar is high.

Contents of the invention

In order to overcome the problems existing in the above-mentioned prior art, the purpose of this utility model is to provide a power layout structure of an independent capacitor module, which effectively solves the problem of large volume, heavy weight, and problems with the power module in the photovoltaic inverter. Heat dissipation of the chassis, pre-product maintenance and cost reduction issues.

In order to achieve the above object, the technical solution adopted in the utility model is:

A power layout structure of an independent capacitor module, mainly composed of a capacitor group 1 and a plurality of power groups 2, the capacitor group includes a housing 1-1, and a plurality of DC bus capacitor components 1 installed in the housing 1-1 -2, the main laminated busbar 1-3 connecting multiple DC bus capacitor components 1-2 in parallel; the power group 2 includes a chassis 2-1, a radiator 2-2 fixed on the chassis 2-1, The IGBT module 2-3 fixed on the radiator 2-2, the branch laminated busbar 2-4 connected to the IGBT module 2-3; the capacitor group 1 is located directly in front of the multiple power groups 2, and the multiple The power group 2 and the capacitor group 1 are connected through branch laminated busbars 2-4 and main laminated busbars 1-3.

The air duct of the radiator 2-2 adopts the air inlet from the bottom and the air outlet from the top. The air duct is short and has no bends. The air inlet of the power group 2 corresponds to the position of the air inlet of the entire inverter cabinet, facing the power group 2 An exhaust fan is installed at the air outlet.

The number of the plurality of power groups 2 is three.

Compared with the prior art, the utility model has the following advantages:

1. The DC bus capacitor group and the power group are independent, and each module group is small in size and light in weight, which is convenient for assembly and maintenance.

2. The layout of each device is reasonable, which not only effectively saves the operation space but also realizes the front maintenance.

3. The air duct of the heat sink of the power pack adopts the method of air intake from the bottom and air outlet from the top. The air duct is short and has no bends, and the cooling effect of the module is optimal.

4. The busbar is small in size, simple in structure and easy to process, and the processing cost of the busbar is low.

Description of drawings

Figure 1 is the overall layout of the power module.

Figure 2 is a connection diagram of the power group and the capacitor group.

Fig. 3 is a heat dissipation air duct diagram of the power group module.

Fig. 4 is a structural diagram of the main laminated busbar.

Detailed ways

The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment.

As shown in Figure 1, the power layout structure of an independent capacitor module of the present invention is mainly composed of a capacitor group 1 and three power groups 2. The capacitor group includes a housing 1-1, and is installed in the housing 1-1. A plurality of DC bus capacitor components 1-2 in the main laminated busbar 1-3 connected in parallel with a plurality of DC bus capacitor components 1-2; the power group 2 includes a chassis 2-1, which is fixed on the chassis 2- 1, the radiator 2-2 on the radiator 2-2, the IGBT module 2-3 fixed on the radiator 2-2, and the branch laminated busbar 2-4 connected with the IGBT module 2-3.

As shown in Figure 2, the capacitor group 1 is located directly in front of the three power groups 2, wherein the series and parallel connections of the DC bus capacitor components 1-2 in the capacitor group 1 are performed through the main stacked busbars 1-3 connection, the three power groups 2 are connected to the capacitor group 1 through branch laminated busbars 2-4 and main laminated busbars 1-3.

As shown in Figure 3, the air duct of the radiator 2-2 adopts the mode of air intake from the bottom and air outlet from the top. Short and without bends, the air inlet of power group 2 corresponds to the air inlet of the entire inverter cabinet, and an exhaust fan is installed at the air outlet of power group 2, so that when the exhaust fan is working, power group 2 will form a The heat dissipation channel for the air in the bottom and the air out in the top.

As shown in FIG. 4 , all the DC bus capacitor components 1 - 2 in the capacitor group 1 are fixed on the casing 1 - 1 , and are connected in parallel through the main laminated bus bars 1 - 3 to form a capacitor group 1 .

Claims (3)

1. A power layout structure of an independent capacitor module, characterized in that: it is mainly composed of a capacitor group (1) and a plurality of power groups (2), and the capacitor group includes a housing (1-1), which is installed in the housing A plurality of DC bus capacitor components (1-2) in (1-1), a main stacked busbar (1-3) connected in parallel to a plurality of DC bus capacitor components (1-2); the power group ( 2) Including the chassis (2-1), the radiator (2-2) fixed on the chassis (2-1), the IGBT module (2-3) fixed on the radiator (2-2), and the IGBT module (2-3) branch laminated busbars (2-4) connected; the capacitor group (1) is located directly in front of multiple power groups (2), and multiple power groups (2) and capacitor groups (1 ) are connected through branch laminated busbars (2-4) and main laminated busbars (1-3). 2. The power layout structure of the independent capacitor module according to claim 1, characterized in that: the air duct of the radiator (2-2) adopts the mode of air inlet from the bottom and air outlet from the top, the air duct is short and has no bends, and the power The air inlet of the group (2) corresponds to the air inlet of the whole inverter cabinet, and an exhaust fan is installed at the air outlet of the power group (2). 3. The power layout structure of independent capacitor modules according to claim 1, characterized in that: the number of the plurality of power groups (2) is three.