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 7 t- E. Z2 I) V; ] 又是洋文!+ g+ d+ q y# P; M" ?: s, C {:soso_e127:}$ g! {& |7 ~* |- p 9 e/ n$ h2 `& 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. 0 H; q% u& b x( V |
Figure 29.jpg (97.21 KB, 下载次数: 0)
IGBT管断的时候加速栅极放电,加速关断。4 b* |. U3 N" Y0 R) d6 W 不加这个是51欧在放电。加这个51欧和二极管放电。 ( G( S' Q, x& C1 Q" q+ ~ 我用的是27欧1206,VS有接15欧电阻 ,没有二极管 |
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