关键词: IGBT, 冷却介质, 散热器结构, 油冷, 二维流道

Abstract: IGBT, the core device in the on-board motor controller, is the main source of heat. An on-board motor controller using pin-fin IGBT is taken as the research object. By changing the position of radiator inlet and outlet, the influence of different arrangement methods on the heat dissipation effect of IGBT was compared. By changing the cooling medium, water, oil and EGW were respectively used as the cooling medium to compare the influence of different cooling medium on the heat dissipation effect of IGBT.A two-dimensional symmetric cross section was extracted from the three-dimensional flow passage, and a two-dimensional fluid-solid coupling thermal calculation method based on k-ε turbulence model was adopted to effectively reduce the computational cost. It was concluded that the best heat dissipation effect and the smallest flow resistance could be obtained when the inlet and outlet position was arranged in the middle of the width direction. The heat dissipation effect of oil on pin-fin IGBT is very poor, so it is not suitable for the indirect heat dissipation of IGBT. At 65℃, the cooling effect of EGW is 16% worse than water.

Key words: IGBT, cooling medium, radiator structure, oil cooling, 2D-model