Recent content by KyleGranger

When corona occurs, the frequency is in the UV spectrum. Thinking about it, since we can also hear it, does that mean it's also in the lower frequency range as well? WHen I'm referring to EMI, I'm questioning what all should be considered. I understand that corona isn't uslly represented on a...

Thanks for the tips. I understand how to get rid of corona (larger radius), but I'm just trying to understand what's actually happening when it does occur. I understand attaching conductive balls at the end of wires, or even using acorn nuts on screws, can help. But when it does occur, how would...

So the coupling is purely radiated? That's part of what I was trying to understand. If I have corona on a wire in air and it's causing EMI issues to nearby electronics, I was wondering if placing a barrier would reduce the EMI (my thoughts were it would not). If it's purely radiated, the effect...

I understand Paschen's law. Basically, the probability of an electron being ejected, gaining enough velocity, and having enough probability of striking other molecules that can eject more electrons causing avalanche are a function of pressure, distance, and electric field. if the pressure is low...

If I have two electrodes and start to see corona on one, there is current flow. So I'm getting from this the current isn't flowing back to ground, it's just "disappearing" in thin air as the electrons are combining with air molecules. First of all, if the molecules were originally neutral...

So with the image above, I believe the air is being ionized and emitting light in that particular region. It terminates at the glass so the channel stops there. Since we know that corona can cause EMI issues, what is the current path? If I had sensitive electronics on the other side of the...

As that article states, "It represents a local region where the air (or other fluid) has undergone electrical breakdown and become conductive". My question is where does the current conduct to? It's easy enough to make general statements but understanding what's truly happing is tougher. So...

I'm not involving any previous threads. I'm just hoping to get some discussion in general. Your question were if I'm balancing series voltage dividers or currents. That's the type of thing that I'm wondering...capacitors shouldn't be used if XX or they're better for XX. My default is resistors...

Yes so the admittance of capacitors to DC is zero. Is there a rule of thumb when you would want a such a voltage divider? Especially compared to a resistive voltage divider. I did a search on the topic but didn't find much. I'm sure the knowledge has to be out there so thought I'd ask it here.

I know this is a loaded question because there are many situations. Are you trying to implement voltage balancing on a switching node, DC bus, etc. Is there a general rule of thumb that I can use for when to use capacitive vs resistive voltage balancing. Can I use a string of "tiny" capacitors...

Like with this plasma globe, where is the current going?

I am trying to understand the current path for corona. Assuming the corona appears on the high voltage electrode, how are the electrons actually flowing? I understand that with flashover a low resistance current path is created as the air is ionized but what is happening with corona?

So if I understand you correctly, using the example of 10 series capacitors at 2 kV each for a 20 kV bus...if I were to measure the top capacitor one terminal would be 18 kV WRT GND. Each capacitor has a differential voltage of 2 kV so the 2nd terminal would be 20 kV WRT GND. You're saying the...

The unfortunate thing is their user manual says the exact same thing. What I am looking for is the isolation voltage I think. I've used these probes to measure about 1.25 kV differential and about 10 kV common mode (with respect to ground). It just hit me that I should check what the actual CM...

Hi, I am looking at a Micsig DP2003 high voltage differential probe. It's rated for 5.6 kV differential voltage. I understand that the differential votlage is measuring across two terminals which can be floating (not referenced to GND). The specs say it is rated for 1 kV common mode voltage...