Romanian ZPM (Zero Point Module)

Okay, I had some free time in weekend so I'm posting updates.

Before starting to upgrade the MOSFETs in the driver, considering the new Cree MOSFETs could change ZPM's behavior, I thought it's a good idea to run some experiments and capture ZPM's behavior with IRFP250 MOSFETs for future references.

So the following tests are using IRFP250 and there are different loads on ZPM's output.

1 x 12V/5W load:

1 x 12V/55W load:

2 x 12V/55W load:

Then I replaced the old MOSFETs with the new C2M0160120D from Cree/WolfSpeed.

I also added a socket with screws for each MOSFET so I will avoid soldering and wasting a lot of time every time I need to replace the MOSFETs.

Here are some images:

And here is a video showing the upgrade and also showing the low-frequency tests made to ensure the MOSFET driver is working properly after upgrade:

The Cree MOSFETs seem to run a bit cooler I think, but I may be subjective as I just measured by putting my hand close to the grids where the hot air is eliminated outside from the MOSFET driver; but that air seems to not be that hot as I felt when I used the old MOSFETs. It is still hot, I expected that a MOSFETs having 1200V/19A to be cold at 25V and let's suppose the full power of my DC source would be used, that is still maximum 5A. This is something witch remain to be clarified, what exactly can make a 1200V/19A MOSFET become hot here.

Here is a test made after upgrade with 1 x 12V/55W load, the ZPM output pattern is still there:

The switching performance of the new MOSFETs is much better, you can see in the image below, that prolonged ringing produced by IRFP250 when switching (see in the first image on the left side) is now much shorter, this is certainly a significant improvement:

Also the pulses are much deeper with the same load, you can see in the first image on the left side that before we had 93Vpp now we have 127Vpp and I saw it going up to 240Vpp:

Also I noticed something strange on oscilloscope when zooming in the switching graphic, the switching line is clear but at the end of the switching it becomes fuzzy and fluid, don't know how how to interpret this and what it means:

But the most remarkable things I discovered is some kind of pattern in ZPM's Vpp when zooming out more and more, seems the Vpp is not constant, it's varying in a certain pattern, it's like ZPM's pulses are periodically opposed by a field which is pulsing just like ZPM. In my opinion I think this is very significant and what we see here is actually the zero-point field being pulsed by ZPM like a sinewave and opposing/interacting with ZPM's pulses:

I don't see any other explanation why ZPM's pulses are not constant and seems to encounter periodically some kind of opposing force which makes Vpp shorter.

As a summary, with the new Cree MOSFETs there are certain improvements like (apparently) less heat emitted while switching, significantly shorter ringing while switching and higher Vpp. Also, I'm not sure if this is happening with the old MOSFETs but I think it's important: the discovery of a unknown field which seems to interact with ZPM's pulses and periodically opposing them: