Question

求英汉翻译，电子专业内容。

After powering this coil at 800VDC for extended periods of time, I experienced an IGBT failure (note that this was the first failure in over a year). The IGBT that failed also had its TVS string come disconnected (though the TVS's were not damaged). So I began to investigate what was going on here, and found a significant oversight in my original design. The problem, as expected, had to do with voltage transients. I turns out that the inductance between my large electrolytic capacitors, and the bridge, along with the decoupling film caps located on the bridge, had a resonant frequency of around 40khz! My rail voltage was ringing up to 160% of the input voltage, so at 800VDC input, this would have presented 1280V across the 1200V IGBT devices... yikes! Here is a picture of the output from one of the half-bridges in this condition:

The only way to fix this condition is to minimize the inductance between the IGBTs and the main filter capacitors. Simply putting small film caps on the IGBTs *does not cut it*! So I came up with this solution:

Answer 1

After powering this coil at 800VDC for extended periods of time, I experienced an IGBT failure (note that this was the first failure in over a year).
在800伏特直流驱动这卷很长时间,我经历了一个IGBT失败(注:这是第一次失败是一年多)。

The IGBT that failed also had its TVS string come disconnected (though the TVS's were not damaged).
失败的也有其IGBT电视串来连接(虽然没有电视的损坏)。

So I began to investigate what was going on here, and found a significant oversight in my original design.
所以我开始调查究竟发生了什么事情在这里,发现了一个重要的监督在我的原始设计。

The problem, as expected, had to do with voltage transients.
这个问题,正如人们所预料的那样,对电压电涌。

I turns out that the inductance between my large electrolytic capacitors, and the bridge, along with the decoupling film caps located on the bridge, had a resonant frequency of around 40khz!
我发现原来我的大型铝电解电容器的电感之间,这座桥,随着解耦电影帽位于桥,有一个共振频率约40 khz !

My rail voltage was ringing up to 160% of the input voltage, so at 800VDC input, this would have presented 1280V across the 1200V IGBT devices...
我的轨道电压响了多达160%的输入电压,所以在800伏特直流输入,这就提出了1280 V隔着1200 V IGBT器件…

yikes!
哎呀!

Here is a picture of the output from one of the half-bridges in this condition:
这里是一个图片的输出从一个half-bridges在这种条件下:

The only way to fix this condition is to minimize the inductance between the IGBTs and the main filter capacitors.
唯一的办法来解决这个条件是最小电感之间的现状及存在的主要IGBTs滤波电容器。

Simply putting small film caps on the IGBTs *does not cut it*!
简单的把小电影上限也无济于事IGBTs * * !

So I came up with this solution:
所以我想出了这个解决方案:

Answer 2

这在800vdc线圈通电后很长一段时间，我经历了一次技术故障（注意，这是第一次失败的一年）。失败的，也有其电视字符串来断开（虽然电视是没有损坏）。所以我开始调查到底是怎么回事，并发现了一个重大的监督在我原来的设计。问题，如预期，做过电压瞬变过程。原来，电感之间的大型铝电解电容器，和桥，随着解耦膜盖位于桥，有大约40 KHz谐振频率！我的轨道电压振铃高达160%的输入电压，所以在800vdc输入，这将提出1280v跨越性开关装置…呀！这里是一个图片的一个输出半桥在这种情况：唯一的解决办法，这一条件是尽量减少之间的电感和滤波电容器上的主。简单地把小膜盖上的IGBT *不削减它*！所以我想出了这个办法：

Answer 3

在800伏特直流驱动这卷很长时间,我经历了一个IGBT失败(注:这是第一次失败是一年多)。失败的也有其IGBT电视串来连接(虽然没有电视的损坏)。所以我开始调查究竟发生了什么事情在这里,发现了一个重要的监督在我的原始设计。这个问题,正如人们所预料的那样,对电压电涌。我发现原来我的大型铝电解电容器的电感之间,这座桥

Answer 4

在800伏特直流驱动这卷很长时间,我经历了一个IGBT失败(注:这是第一次失败是一年多)。失败的也有其IGBT电视串来连接(虽然没有电视的损坏)。所以我开始调查究竟发生了什么事情在这里,发现了一个重要的监督在我的原始设计。这个问题,正如人们所预料的那样,对电压电涌。我发现原来我的大型铝电解电容器的电感之间,这座桥