大家帮忙参考下这个二极管的作用

IGBT管断的时候加速栅极放电，加速关断。
不加这个是51欧在放电。加这个51欧和二极管放电。
我用的是27欧1206，VS有接15欧电阻 ，没有二极管

这个二极管对IGBT很重要，个人觉得用肖特基二极管会更好些。

如果有实际的电路可以测试下，有没有这个管子前后的效果，个人感觉是为了削弱开关管切换时候的过冲，对EMI有好处，估计还能提高些效率。

为什么Vs不加呢?你这个二极管选了什么型号的?

栅极电阻小，再加这个二极管影响就不明显了。

又是洋文！

As an added safety margin a resistor diode network can be added to the gate, as shown with dashed lines in Figure 29. The purpose of this network is to further delay the turn-on, without affecting the turn-off, thereby inserting some additional dead-time. The resistor-diode network is also useful in reducing the peak of the current spike during the reverse recovery time. This has an impact on power losses, as well as dv/dt and EMI.

感谢狗大

狗大真是只是渊博，从那边搞得这么多的资料真是佩服