The root cause of IGBT burnout is excessive temperature. Reasons for excessive temperature:
1 current is too large 2 heat dissipation is not good reason for bad heat dissipation:
1 heat sink dust is too much 2 inlet air volume is not enough or the temperature is too high 3 outlet air volume is not enough 4 Unreasonable air duct design 5IGBT is not closely connected to the heat sink, such as conductive paste improper application of excessive current causes:
1 Short circuit, excessive load, grounding and other 2IGBT drive circuit problems, resulting in IGBT can not be turned off in time 3IGBT itself has defects, such as the chip has a slight crack 4 conductive foreign matter into 5 corrosive substances in the air 6 air humidity is too large, there is condensate