Power module with moisture-proof and dehumidifying function, and moisture-proof and dehumidifying method of the same

Abstract

The invention provides a power module with a moisture-proof and dehumidifying function, and a moisture-proof and dehumidifying method of the same. The power module with a moisture-proof and dehumidifying function comprises IGBT, a drive board, three-proofing paint, a radiator, PTC heating resistors, sealant, a temperature control switch and a binding post, wherein the PTC heating resistors are arranged on the mounting surface of the radiator which is used for radiation of the IGBT; the peripheral edge of the juncture between the ceramic base plate of the IGBT and the radiator is coated with the sealant; the temperature control switch is arranged on the radiator; and the binding post is used for supplying power for the PTC heating resistors. The power module with a moisture-proof and dehumidifying function, and the moisture-proof and dehumidifying method of the same have the advantages that through mutual coordination of the PTC heating resistors, the sealant, the temperature control switch and the three-proofing paint, the moisture-proof and dehumidifying function is completed so that the power module is moisture-proof and reliable, and can dehumidify thoroughly and can effectively process the condensation problem. The power module with a moisture-proof and dehumidifying function, and the moisture-proof and dehumidifying method of the same can solve the problems that in the high humidity environment, a traditional power module stops working for a long time or the device is damaged because of condensation of moisture during the storage process, and can realize the quick dehumidification function of the power module.

Description

technical field [0001] The invention belongs to the field of wind power generation, and in particular relates to a power module with a moisture-proof and dehumidification function and a moisture-proof and dehumidification method thereof. Background technique [0002] In the field of wind power generation, due to the common high-humidity climate in the area where the product is applied, the relative air humidity in extreme areas is 95%-100%, so the internal operation and storage environment of the power module is very harsh. In the existing technology, the protection level of the cabinet where the power module is located is basically protected against moisture. However, due to the ventilation and heat dissipation requirements of the air-cooled power module, it cannot be made into a completely sealed cabinet, and the external high-humidity air will inevitably The air enters the power module through the air intake hole, causing the key components of the power module to be damp....

AI Technical Summary

Problems solved by technology

In the existing technology, the protection level of the cabinet where the power module is located is basically protected against moisture. However, due to the ventilation and heat dissipation requirements of the air-cooled power module, it cannot be made into a completely sealed cabinet, and the external high-humidity air will inevitably Enter the power module through the air intake hole, causing the key components of the power module to be damp

At present, the common dehumidification method is to dehumidify the power module IGBT and other devices by blowing heaters and mechanical ventilation, but this method has the following disadvantages: First, the dehumidification effect is not good, and the moisture has entered the inside of the IGBT to form condensed water. Heating and dehumidifying by external air blowing cannot effectively discharge the condensed water inside the IGBT chip; second, the temperature rise of the blowing heater is not high, and the heating and dehumidification time is very long, and the industry generally requires heating for more than 5 hours; third, mechanical ventilation is only through increasing air The flow rate is used to increase the evaporation rate of condensed water, but without heat input, the dehumidification effect is not good, and the best level of dehumidification is to maintain the same humidity as the humid air, which cannot completely solve the problem of moisture.

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