-1kV pulse generator

Hi there and welcome to Electronics Point

I think a ferrite cored transformer would be a good starting point, driven by a transistor or MOSFET that conducts for a short time before the pulse, to build up energy in the core, then turns OFF to produce a large flyback pulse.

You can connect a high-voltage capacitor across the transformer to shape the pulse and provide crude voltage regulation. What shape do you want?

What's your location? (There's a place for that in your profile.) What component suppliers do you use?

 

Hi Oseania,

Welcome to EP! 1kV is not going to get a lot of corona discharge unless the gap is really short.....ignition coils are fairly robust/cheap/easy....if you assume a V8 has 4 ignition cycles per revolution and that most V8's are capable of at least 6,000RPM, this would suggest that they are capable of at least 400hz, well beyond your 25hz target and are typically capable of well beyond 10kV....so I wouldn't rule them out casually.....The "Tesla Folks" wind large air-core transformers around cardboard cores...this is certainly an option.....Frequently to get really high voltages the use of a "condenser" (read: "capacitor") is employed to "ratchet" the voltage upward until the voltage "breaks over the gap"....but you likely know all this.....

anyway....Are you attempting to build an Ozone generator or are you just "playing" with corona discharge?

Fish

 

Fish, I think the reason Oseania doesn't want to use the ignition coil idea is that the pulse would be too long. The pulse rate would be no problem. The inductance of an ignition coil is probably too high, although using a smalller "condenser" value would help to get a shorter pulse with the desired shape. Also, ignition coils are pretty big.

I assumed Oseania knows why he wants a -1 kV, 10 µs pulse, but that's a fair question.

 

Um... I can't give you any specifics, I'm afraid. If I was going to do this, I would get a range of cores, a few reels of wire, and some high-voltage pulse-withstanding capacitors around the 1~47 nF range, and do some experimentation.

 

Oseania,

Perhaps if you gave a few more details about what you are attempting to achieve we might be able to make better suggestions about how to approach the problem....for instance the first things that come to my mind when I think of HV pulses designed for corona discharge are 1) "Ignition Systems" (internal combustion engines//gas ignitors etc)... 2) "Tesla Toys" 3) Ozone Generators 4) Welding/Plasma Arc Starters(not fundamentally different than #1) ... and the list ends there, and is ordered by the frequency in which I see HV pulses mentioned/discussed....I am not saying there aren't other possible purposes....just saying I can't think of any right off the top of my head....and it might help us help you if we had some idea of the intended purpose....

Fish