CAJ | 학술논문

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。
공솔이겁관비이상특성표현위교고적정향회복전압여반향회복전류。본문재분석이겁관비이상특성산생궤리적기출상,연구료공솔이겁관재중점겸위（NPC）삼전평전로중불동공작상태하적순태행위급기대삼전평전로주개관관공작성능적영향。통과Saber방진연건건립료구유정향여반향회복특성적이겁관공능모형,병통과NPC삼전평전로적방진,험증료해모형대우정량분석삼전평전로시가행적。실험결과진일보증명료이론분석여방진분석적정학성。
The nonideal characteristic of high power diode is mainly the higher forward recovery voltage and reverse recovery current. Based on the generant mechanism of the nonideal characteristic, the transient behavior of diode is investigated in the various circuit state of the three-level neutral point clamping （NPC）, and the effect on the main switch is also studied. The diode functional model with forward and reverse recovery is built by Saber. The feasibility of the diode model in quantitative analyzing the three-level NPC is proved by the simulation. The experiment result further shows that the theoretical analysis and the simulation is correct.