Study on the mechanism of power device's dust absorption in plateau environment

摘要

This paper designed a simulation test platform, aiming at studying the phenomenon of dust absorption of power devices in plateau environment. Researches show that: under the same conditions, the distance between gas molecules will increase as the atmospheric pressure getting lower. When getting enough kinetic energy, those gas particles will collide with each other, forming charged particles in the collision process. When the charged particle is combined with the dust particle, the power device forms the dust absorption phenomenon under the action of the electric field. The phenomenon of dust absorption becomes serious with the reduction of air pressure, which causes the power device to be damaged due to the decrease of heat dissipation performance. Thus, it is of great significance to reduce the falling dust phenomenon to ensure the reliable operation of power devices.