Inverter heat-radiating device with air duct partition plates

Abstract

The invention relates to an inverter heat-radiating device with air duct partition plates, which belongs to the field of photovoltaic inverter thermal design. The inverter heat-radiating device with the air duct partition plates comprises a centrifugal fan, a fan mounting plate, a flow equalizing air duct, radiator air ducts, radiators and a mounting plate. According to the inverter heat-radiatingdevice, six IGBT of an inverter are separately arranged in three different cavities according to A, B and C phases, and the inverter heat-radiating device guarantees that the temperature of the IGBTsdoes not exceed a limit in the case of using one centrifugal fan. Meanwhile, the invention designs an air duct, which ensures air flow entering the three cavities are even, and the difference betweenthe highest temperature of the A-phase, B-phase and C-phase IGBTs is less than 2 DEG C, so that the temperature of each IGBT group is balanced and the problem of uneven current of the IGBTs is solved.

Description

technical field [0001] The invention relates to the field of thermal design of photovoltaic inverters, in particular to an inverter cooling device with an air duct partition. Background technique [0002] With the rapid development of high-power electronic devices, corresponding to the demand for light weight and miniaturization, inverters are developing in the direction of high frequency and large capacity. The heat generated by each device in the inverter continues to increase, and the degree of mutual influence between each device is also deepened. If the heat generated by each device in the inverter cannot be dissipated in time, it will inevitably lead to an increase in the operating temperature of the device. According to statistics, the failure rate of most electronic devices increases exponentially with the increase of temperature, and 55% of them are caused by temperature exceeding the limit. How to dissipate the heat generated by the electronic devices in the inve...

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Problems solved by technology

[0004] In order to obtain a suitable structural solution to the IGBT heat dissipation problem on the basis of reducing the cost as much as possible, the invention designs an inverter heat dissipation device with an air duct partition to balance the temperature of each group of IGBTs and solve the problem of IGBT unevenness. To deal with flow problems, the following technical solutions are adopted:

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