狗大真是只是渊博,从那边搞得这么多的资料真是佩服 |
本帖最后由 超級狗 于 2013-8-16 09:39 编辑 T, U" ~1 ?. F1 }' o; ~: C j 又是洋文! {:soso_e127:}+ |0 D( N8 O q' M8 N2 W 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. |
Figure 29.jpg (97.21 KB, 下载次数: 0)
本帖最后由 zgq800712 于 2013-8-15 16:49 编辑 M; v3 d5 |% v! L 6 S% ] H6 O J, Q% Y, ]$ D* O 0 E2 j y7 L" L0 v" F# f3 j ' N' Q2 E! x$ H 栅极电阻小,再加这个二极管影响就不明显了。: q: r! F* ~$ G# [ ; G* \" E( Z; q0 J2 W ![]() % F4 t0 G/ S. z9 { igbt 不是这个管子,其他的管子 ST的 |
IGBT管断的时候加速栅极放电,加速关断。2 d8 x& Q# m9 C% u1 a 不加这个是51欧在放电。加这个51欧和二极管放电。. w! }! }6 G& @+ O 我用的是27欧1206,VS有接15欧电阻 ,没有二极管 |
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