Inverter H-bridge IGBT single tube drive and protection

Everyone knows that IGBT single tube is quite fragile, the same current capacity IGBT single tube, more than the same current capacity, MOSFET is fragile, that is, in the inverting H bridge, there is no problem, but IGBT, may The boot is blown up. This makes many people estimate. At that time, I saw the buddy of the fish machine with FGH25N120and, which reflected it was easy to burn, and did not think about it. Only when I was in my work, I found IGBT, I found me failed. I really thought that an IRFP460, 20A / 500V MOSFET, I use a SGH40N60UFD40A / 600V IGBT? It will not be blown, but the actual situation is, after loading, suddenly add the load and revoke the load, it is blown several times, I thought it was not welded, and then changed, it was blown away, so white white Waste a lot of IGBT. Later, some rules were found, that is, the measures to protect the peak current can make IGBT will not blow, I will tell these things in detail, I don't want to forgive, this post will be updated slowly, also I hope that the masters will make more comments. We see this question several parts to solve: 1, drive circuit; 2, current collecting current; 3, protection mechanism; First, drive circuit The IGBT used in this time is ixys, IXGH48N60B3D1, detailed specifications are as follows: IXGH48N60B3D1 The drive circuit is as follows: Be This is a very typical application circuit, which can be used in IGBT or MOSFET, but there are somewhat different. 1, there is a negative pressure generating circuit, 2, isolated drive, 3. Power supply separately. First let's take a look, this circuit is not protected, it is used in the inverter 100%, but we can clear the essence of this circuit. Let's talk about it first: 1: Drive resistor R2, this is very important in the driving, and the D1 is closed, and the IGBT's CGE is quickly discharged. It is actually needed, and this D1 can not, or in the D1 loop. The resistor is a gate resistance when the 0FF is closed. Technology area On Mu, the SiC, GaN, and Three Levels brought by Siqiang reach your efficiency. How to prevent switching power supply noise by using secondary output filters Ceramic vertical mount package (CVMP) welding precautions and layout Mathematical modeling and loop compensation design of DC-DC converters What are the commonly used benchmark regulated power?

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