摘要:针对IGBT存在的响应速度慢、异质结构导致的热传导系数不均衡等问题,在对IGBT失效机理和现有结温测量模型研究的基础上,提出一种基于热积累的热电模型,以实时准确地测量IGBT结温.该方法在能量平衡的基础上,将IGBT温度的测量转换为测量IGBT某一点的温度,很好地避开了IGBT异质结构问题.Matlab仿真和实验结果表明,二者温度曲线有较好的拟合度,验证了该方法的可行性.
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