3.2
IGBT驱动栅射电容CGE的变化对
IGBT模块关断过程的影响
类似于栅极电阻RG的变化,可以观察到,不同的CGE对
IGBT电压尖峰、dv/dt及di/dt没有明显的影响,只是CGE增加会使整个关断行为延迟的越来越多。
Max(C2): 15.42V, Max(C3): 94A, Max(C4): 488V
Figure 14: IGBT turn-off with RG = 1.8Ω and CGE = 10nF
Max(C2): 15.42V, Max(C3): 94A, Max(C4): 488V
Figure 15: IGBT turn-off with RG = 1.8Ω and CGE = 56nF
Max(C2): 15.42V, Max(C3): 94A, Max(C4): 488V
Figure 16: IGBT turn-off with RG = 1.8Ω and CGE = 100nF
Chart 3 summarizes the results. Reference point for td is the measurement with RG = 1.8Ω and no additional CGE(Figure 10)
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Chart 3: td vs. CGE (referenced to RG = 1.8Ω and no CGE applied)
作者:Jackie Zhao