An air-cooled heat sink for high-power igbt modules considering operating conditions

Abstract

The invention discloses an air-cooled radiating fin for high-power IGBT modules considering operating conditions. The air-cooled radiating fin comprises a copper radiating base installed on the back of a copper substrate of an IGBT module, a radiating warping fin vertically welded on the outer side of the copper radiating base, and a radiating fan arranged on one side of the radiating warping fin.A depression is arranged at a position of the outer side of the copper radiating base corresponding to an IGBT chip, or a depression is arranged at a position of the outer side of the copper radiating base corresponding to a diode chip. A copper tube heat exchanger is welded at the depression. The copper tube heat exchanger is composed of a radiator coolant inlet pipe, a radiator coolant outlet pipe, a radiating cold circulation pump and a copper tube radiator warping fin, is filled with cooling liquid, and is a closed internal circulation liquid radiating system. By fully considering the inconsistency of local heating values of the IGBT module under different operating conditions, a copper tube heat exchanger system is designed at the part with high local heating value of the IGBT moduleto realize uniform heat radiation of the copper substrate.

Description

technical field [0001] The invention relates to the technical field of heat dissipation, in particular to an air-cooled heat sink for a high-power IGBT module in consideration of operating conditions. Background technique [0002] The IGBT module (Insulated Gate Bipolar Transistor, Insulated Gate Bipolar Transistor) is a composite fully-controlled voltage-driven power semiconductor device composed of BJT (Bipolar Transistor) and MOS (Insulated Gate Field Effect Transistor). The advantages of high input impedance of MOSFET and low turn-on voltage drop of GTR. At present, the high-power IGBT module (single module) that can be applied in engineering can withstand a voltage of up to 6.5kV, a current load of up to thousands of amperes, a fast breaking speed, and a high switching frequency. High-power IGBT modules are currently widely used in fields such as high-voltage DC transmission, transportation, and renewable energy power generation. They are the core components of power e...

AI Technical Summary

Problems solved by technology

The air-cooled heat sink can solve the problem of uneven distribution of junction temperature or case temperature inside the IGBT module under the inverter working condition or the rectifying working condition, and solve the problem that the converter or other power electronic devices are installed in the field, water is inconvenient, and cannot Use water cooling to strengthen the problem of heat dissipation

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