CN211508883U

CN211508883U - Heat radiator of IGBT module for wind power generation converter

Info

Publication number: CN211508883U
Application number: CN201922432510.7U
Authority: CN
Inventors: 潘天天
Original assignee: Zhejiang Haide New Energy Co Ltd
Current assignee: Zhejiang Haide New Energy Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-09-15
Anticipated expiration: 2029-12-30

Abstract

The utility model relates to a wind power generation converter IGBT heat dissipation technical field, specifically speaking is a heat abstractor of wind power generation converter IGBT module, and the heat abstractor includes centrifugal fan and radiator, and the panel beating structure spare is fixedly connected with on one of the left and right sides of radiator, and the IGBT module detachably is fixedly installed on the panel beating structure spare, and the front and back sides of radiator are provided with a wind channel air intake respectively, and the admission line of centrifugal fan communicates with the wind channel air intake; and fan wind-shielding sheets are respectively arranged in the air inlets of the two air channels. The heat dissipation device in the utility model takes away heat by using the centrifugal fan in an air draft mode, opens the air channels of two adjacent IGBTs, and designs two air baffles at the air inlet of the module, so that the heat taken away by the centrifugal fan from each IGBT is uniform; therefore, the service life of the IGBT can be prolonged, the failure rate of equipment is reduced, and the cost is saved.

Description

Heat radiator of IGBT module for wind power generation converter

Technical Field

The utility model relates to a wind power generation converter IGBT heat dissipation technical field, specifically speaking is a heat abstractor of wind power generation converter module, the heat abstractor includes centrifugal fan and radiator, be fixedly connected with sheet metal structure spare on one of the left and right sides of radiator, the IGBT module detachably fixed mounting is on the sheet metal structure spare, the front and rear side of radiator is provided with an air duct air intake respectively, centrifugal fan's inlet duct with the air duct air intake communicates; and fan wind-shielding sheets are respectively arranged in the two air inlets of the air duct. Compared with the prior art, the utility model has the following advantage: the heat dissipation device in the utility model takes away heat by using the centrifugal fan in an air draft mode, opens the air channels of two adjacent IGBTs, and designs two air baffles at the air inlet of the module, so that the heat taken away by the centrifugal fan from each IGBT is uniform; therefore, the service life of the IGBT can be prolonged, the failure rate of equipment is reduced, and the cost is saved.

Background

In a wind power generation converter system, an IGBT power module serves as a core device of the converter, the IGBT power module serves as a core device of the converter and bears the operation of converting, in power system equipment, the IGBT power module is an indispensable element, the power module can be arranged in the converter in parallel on a dimension, a bus capacitor and the like to form the whole power module, and when the converter runs, the IGBT passes through large current and the switching frequency is high, so that the heat productivity of the IGBT is huge. The heating of the IGBT body is a key index for designing the power module, the IGBT is arranged in the converter, and the common heat dissipation modes comprise forced air cooling heat dissipation and liquid cooling heat dissipation. Both heat dissipation methods need to be matched with a heat sink for heat dissipation, such as:

chinese patent CN200910101646.8 discloses a hot plate cooler for wind power generation IGBT variable current power module, which comprises an aluminum substrate, a hot plate, heat dissipation fins and a wind scooper, wherein the components are assembled together by bolts, and the heat of the aluminum substrate is transferred to the heat dissipation fins through the hot plate and then dissipated by air cooling. The invention has the advantages that: 1) the uneven heat flux density generated by the IGBT converter power module on the back of the aluminum substrate can be uniformly transferred to the radiating fins on the other side of the hot plate through the special performance of the hot plate, so that a good radiating effect is guaranteed. 2) The heat plate structure is adopted to transfer heat, and the side effect of cantilever stress is avoided. 3) The volume is small, and the height of the hot plate and the radiating fins is reduced by 84% compared with that of a radiator with a heat pipe structure. The compact structure also meets the requirements of users;

chinese patent CN201720107114.5 discloses an air-cooled power unit, belonging to the technical field of accessories of converters of wind generating sets. The power module comprises an IGBT module assembly, an IGBT drive board, a capacitor array, a laminated busbar, a copper bar and a discharge resistor; the IGBT module assembly comprises two parallel IGBT modules, and the IGBT modules are connected with an IGBT drive board; the capacitor array comprises eight support capacitors connected in parallel; the IGBT module assembly, the capacitor array and the discharge resistor are connected in parallel through the laminated busbar; the copper bar is connected to the IGBT module assembly and matched with the laminated busbar to form a full-bridge circuit;

therefore, in the IGBT heat dissipation mode in the prior art, especially in forced air cooling heat dissipation, the heat dissipation of the IGBT is uneven due to the limitations of the heat dissipation mode and the IGBT layout, so that the life cycle of the IGBT is influenced; therefore, a new heat dissipation structure is needed to fundamentally solve the problem of uneven heat dissipation layout of the IGBT.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the present invention is to provide a heat dissipation device for a wind power converter module, wherein the heat dissipation device comprises a centrifugal fan and a heat sink, a sheet metal structure is fixedly connected to one of the left and right sides of the heat sink, the IGBT module is detachably and fixedly mounted on the sheet metal structure, the front and rear sides of the heat sink are respectively provided with an air inlet of an air duct, and an air inlet pipeline of the centrifugal fan is communicated with the air inlet of the air duct; and fan wind-shielding sheets are respectively arranged in the two air inlets of the air duct. Compared with the prior art, the utility model has the following advantage: the heat dissipation device in the utility model takes away heat by using the centrifugal fan in an air draft mode, opens the air channels of two adjacent IGBTs, and designs two air baffles at the air inlet of the module, so that the heat taken away by the centrifugal fan from each IGBT is uniform; therefore, the service life of the IGBT can be prolonged, the failure rate of equipment is reduced, and the cost is saved.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

a heat dissipation device of an IGBT module for a wind power generation converter comprises a centrifugal fan and a radiator, wherein a sheet metal structural part is fixedly connected to one of the left side surface and the right side surface of the radiator, the IGBT module is detachably and fixedly installed on the sheet metal structural part, an air duct air inlet is formed in each of the front side and the rear side of the radiator, and an air inlet pipeline of the centrifugal fan is communicated with the air duct air inlet; fan wind-shielding sheets are respectively arranged in the two air inlets of the air duct;

preferably, the IGBT module is composed of a plurality of IGBTs;

preferably, each IGBT is provided with an air duct for heat dissipation;

preferably, the air ducts between two adjacent IGBTs are communicated.

Preferably, the centrifugal fan is of an air draft structure.

Compared with the prior art, the utility model has the positive effects that: the heat dissipation device in the utility model takes away heat by using the centrifugal fan in an air draft mode, opens the air channels of two adjacent IGBTs, and designs two air baffles at the air inlet of the module, so that the heat taken away by the centrifugal fan from each IGBT is uniform; therefore, the service life of the IGBT can be prolonged, the failure rate of equipment is reduced, and the cost is saved.

Drawings

Fig. 1 is a front view of the heat dissipating device of the present invention;

fig. 2 is a rear view of the heat dissipating device of the present invention;

the labels in the figures are: the air conditioner comprises a 1-IGBT module, a 2-radiator, a 3-air duct air inlet and a 4-fan wind shield.

Detailed Description

The present invention will be further described with reference to fig. 1-2 and the following detailed description.

Referring to the attached drawings 1-2, the heat dissipation device of the IGBT module for the wind power generation converter comprises a centrifugal fan and a radiator 2, a sheet metal structural part is fixedly connected to one of the left side surface and the right side surface of the radiator 2, the IGBT module 1 is detachably and fixedly installed on the sheet metal structural part, an air duct air inlet 3 is respectively arranged on the front side and the rear side of the radiator 2, and an air inlet pipeline of the centrifugal fan is communicated with the air duct air inlet 3; fan wind-shielding sheets 4 are respectively arranged in the two air inlet 3 of the air duct; the IGBT module 1 consists of a plurality of IGBTs; each IGBT is provided with an air duct for heat dissipation; the air ducts between two adjacent IGBTs are communicated; the centrifugal fan is of an air draft type structure.

In the IGBT cooling mode of converter, use centrifugal fan to cool off the IGBT, be about to the IGBT module and fix on the sheet metal structure, the whole module of IGBT is installed on the sheet metal structure, uses centrifugal fan to adopt the mode of convulsions to take away the heat, dredges the wind channel of two IGBTs of back of the body formula, and it is even to design two shelves wind at the module air intake simultaneously, and the heat that makes centrifugal fan take away each IGBT all. Thereby achieving the consistency of the service life of the IGBT.

The IGBT module of converter is arranged side by side on the structure sheet metal component, takes the mode of convulsions in IGBT module bottom, carries out forced heat dissipation to the module, produces the heat when IGBT during operation, and the heat can be conducted to the radiator through the mode of conduction in, and centrifugal fan opens work, passes through the air exchange with the heat in the radiator, takes out the heat of IGBT module to reach radiating effect. Meanwhile, due to the existence of the two heat dissipation wind blocking sheets in the figure 1, the wind speed can be blocked at the air inlet of the module, the starting wind speed is reduced, the wind enters a deeper wind channel along with the wind, the wind channel in front of the two modules is communicated, the wind speed of each IGBT at the back can be uniform, and the heat taken away by each IGBT is relatively the same. Therefore, the heat productivity of each IGBT is uniform, the service life of the IGBT can be prolonged, the equipment failure rate is reduced, and the cost is saved.

Table 1, shown below, compares experimental data before and after the addition of a wind deflector; it can be observed through table 1 that when the wind shield is added and no wind shield is present in the same module of converter, the temperature rise data of the IGBTs at 6 different positions are compared, and after the wind shield is added, the temperature rise at the highest point and the temperature rise at the lowest point are within 10K. And when the wind shield is not arranged, the temperature rise at the highest point and the temperature rise at the lowest point are found to be more than 50K.

Compared with the prior art, the utility model discloses combine actually, find one kind and can make in the IGBT module all IGBT temperature rise control a very little difference within range. All IGBT life cycles can be controlled in the same period; the heat dissipation device in the utility model takes away heat by using the centrifugal fan in an air draft mode, opens the air channels of two adjacent IGBTs, and designs two air baffles at the air inlet of the module, so that the heat taken away by the centrifugal fan from each IGBT is uniform; therefore, the service life of the IGBT can be prolonged, the failure rate of equipment is reduced, and the cost is saved.

To sum up, only embody the preferred technical scheme of the utility model, some changes that the technical staff in the field probably made to some of them all embody the principle of the utility model, all should be the technical scope of the utility model.

Claims

1. A heat dissipation device of an IGBT module for a wind power generation converter is characterized by comprising a centrifugal fan and a radiator, wherein a sheet metal structural part is fixedly connected to one of the left side surface and the right side surface of the radiator, and the IGBT module consists of a plurality of IGBTs; the IGBT module is detachably and fixedly installed on the sheet metal structural part, the front side and the rear side of the radiator are respectively provided with an air duct air inlet, and an air inlet pipeline of the centrifugal fan is communicated with the air duct air inlet; and fan wind-shielding sheets are respectively arranged in the two air inlets of the air duct.

2. The heat dissipating device of an IGBT module for a wind power converter according to claim 1, wherein each IGBT is provided with an air duct for dissipating heat.

3. The heat sink of the IGBT module for the wind power generation converter as recited in claim 2, wherein the air channels between two adjacent IGBTs are communicated.

4. The heat sink of the IGBT module for the wind power generation converter, as recited in any one of claims 1-3, characterized in that the centrifugal fan is an air draft type centrifugal fan.