The engineering project I'm involved with uses a number of power supplies. I open up one of them, a +30KV supply to swap out the rectifier to make it into a negative supply. I this video, I give a brief tour of the power supply.
Jerry and Craig- you are both correct, actually. It IS clearly a classic CW multiplier circuit, but it also serves to rectify the high-freq waves from the fly backs. Dave Jones goes into detail in his vid on multipliers. Sorry no link..
As I said in an earlier comment, it's not a multiplier, just a high voltage rectifier. All the voltage multiplication is done in the two transformers. I have the schematics. Thanks for watching and taking the time to comment.
Interesting power supply. Thanks for sharing! The high voltage part looks like a typical voltage multiplier using capacitors and diodes (Cockcroft-Walton voltage multiplier circuit).
Thanks for watching. A lot of people watching this video think that part is a voltage multiplier circuit. It isn't, it is simply a high voltage rectifier. The capacitors in there are across the diodes and serve to reduce the switching noise the diodes would create. All the voltage multiplying is done by the two pancake transformers just outside of the white box that contains the diodes.
As a lot of the commenters have pointed out the HV brick is in fact a rectifier/multiplier. Those fly back transformer are not insulated enough to have 25kV AC on them. There are a number of things in this video that are not entirely correct specifically relating to the HV section.
Hello buddy, that's a sweet unit. very easy to swop out the high voltage unit from it! +/- output would like to get my hands on one of them' to have a good look at its workings through out!! im very into high voltage, I find it Very fascinating! the unit you show here has been made with alot of basic parts! very cool. I do like that unit! ;-) the white unit you swapped out looks very much like a Multiplier in some way, with the capacitors and diodes! to bring the voltage up from maybe 10kv to 30kv. would like a more detail look inside it! ⚡ very interesting, thank you thanks for sharing, 👍 👍 👍 👍 👍 THUMBS UP 👍 👍 👍 👍 👍 Anthony High1Voltage1Rules
The power supply is very robust. It has been in almost continuous use since we installed it more than a year ago. This model has been made for years and so uses older technology to control the power supply. Not a microcontroller to be found anywhere in it! The white unit is simply a high voltage rectifier. Please see my comments below. Thanks for watching and taking the time to comment.
It appears as though it uses a voltage doubler for the line input to the fets for the two halfbriges that the drive each fly back respectively. I am definitely going to purchase one of these. My 100kv power supply I built is a bit too powerfulf for some of the stuff I do. 8 foot plasma arcs can be a bit unruly and like trying to herd cats.
I hope you have deep pockets, these power supplies aren't cheap. Have fun with your experiments. Always keep one hand behind your back when you are poking around these HV power supplies!
From your experience, how easy/difficult would be to repair a faulty similar Glassman 125kV power supply? I am able to turn it on and turn on also the HV output but when I try to increase the kV and/or mA it does not respond...
Your best bet would be to get the schematics. The power supply I reviewed is all analog control, no microcontroller. If yours is the same, it may be fairly straight forward to fix. Good luck!
