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考虑二极管非理想特性的中点钳位三电平电路的分析

, PP. 40-46

Keywords: 功率二极管,正向恢复,反向恢复,NPC三电平电路

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Abstract:

功率二极管非理想特性表现为较高的正向恢复电压与反向恢复电流。本文在分析二极管非理想特性产生机理的基础上,研究了功率二极管在中点钳位(NPC)三电平电路中不同工作状态下的瞬态行为及其对三电平电路主开关管工作性能的影响。通过Saber仿真软件建立了具有正向与反向恢复特性的二极管功能模型,并通过NPC三电平电路的仿真,验证了该模型对于定量分析三电平电路是可行的。实验结果进一步证明了理论分析与仿真分析的正确性。

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