Wir ziehen um. 
I have been thinking about building a powerful electronic load for a long time. However, I mean very powerful in units of kW (preferably 1 to 2).
I deal primarily with the power part (transistors). You can choose from countless different types of MOSFETs or IGBTs. However, it is best to choose those that either have (L2 (Linear)) in the name or have a SOA DC curve in the datasheet.
I found out that when using ordinary "switching" transistors, which are not suitable for linear mode, hot-spots can be created inside the semiconductor structure, which can damage the transistor even when even 1/10 Pd [W] is used.
And there is also the question of what number of transistors to choose.. either I will choose more transistors and control each one separately from the operands (due to inaccuracies with respect to themselves). So, from a 1kW load, I would use one of these transistors for example 10x:
https://cz.mouser.com/datasheet/2/308/1 ... 318217.pdf
https://cz.mouser.com/datasheet/2/240/media-3320402.pdf
Both transistors have quite high Pd and also have DC SOA...
If there was a loss of 100W on each, there shouldn't be a problem, but I would like to use water cooling with direct contact of the transistor to the heatsink... that way the voltage that would be on the load would get to both the water and the heatsink..
So I searched further and came across this:
https://www.infineon.com/dgdl/Infineon- ... 7645573e9f
I have the opportunity to buy a few of these IGBTs at a decent price. But the problem is that they don't have anything about SOA in the datasheet (mostly this is not stated in such powerful ones), but they have "High DC Stability" written there...
However, it has a 7.65 kW power dissipation, so I'm wondering if a 1kW DC would handle it...
So my question is, do you think this IGBT could be used for DC operation?
- FF1400R12IP4.png (83.94 KiB) 8720 mal betrachtet
