Module breakage test station Suddenly, the explosion sounded during operation, and the external insurance burned. The disassemble found that the igbt module of the inverter was damaged. After testing the relevant boards, it was found that the igbt trigger line was damaged and the other boards were measured to be normal. When the inverter board was removed, it was found that there were a lot of oil and dust on the power board and current detecting board. Open the heat sink fan of the inverter and see that the heat sink is also covered with oil and debris, and completely block the heat dissipation channel of the inverter. It is thus concluded that the IGBT module of the inverter is damaged due to poor heat dissipation.

Module breakage test station Repair process:
Firstly, the inverter is completely disassembled, the heat sink of the heat dissipation channel is removed, the heat sink is cleaned with air pressure gas, and the internal structural parts and boards of the inverter are all cleaned up. Install the igbt module. When installing the igbt module, install it in order according to the requirements of the module. The torque is moderate. Repair the trigger line and install other devices in sequence. After the installation is completed, the static test is performed, and after the static test result is good, the power-on test and the load test are performed. Pass the load test and successfully complete the repair.

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