Adjustable HV PSU - Page 1
Forum section: electronics / projects

author: Cloud
author_rank: Regular Contributor
timestamp: June 08, 2020, 08:35:08 am
content: For a project I would need an adjustable high voltage PSU. Voltage range should be between 250V - 15kV and current is enough 1mA. What would be best approach. I was thinking of using flyback transformer but it would have to be custom made. Flyback transformers from CRTs would probably work but I want to include off the shelf parts in my designs.

author: PartialDischarge
author_rank: Super Contributor
timestamp: June 08, 2020, 09:55:37 am
content: Don't do this yourself. Fluke has the 410B up to 10kV, for higher output find adjustable modular power supplies from Spellman on ebay. They usually go for less than $300, I've got a 50kV model from them iirc.

author: coromonadalix
author_rank: Super Contributor
timestamp: June 08, 2020, 10:13:16 am
content: Some electrophoresis power supplies could help in some case, but dont cover the full range you need

author: coromonadalix
author_rank: Super Contributor
timestamp: June 08, 2020, 02:24:03 pm
content: https://www.ebay.com/itm/DC-High-Voltage-Power-Supply-digital-Meter-electrostatic-generator-Electrospun/142541237208?Many models to choose ?

author: Cloud
author_rank: Regular Contributor
timestamp: June 09, 2020, 09:25:52 am
content: I forgot to mention. This PSU will be inside a project and controlled by MCU. I was looking at applied kilovolts PSUs but they are a bit expensive

author: PartialDischarge
author_rank: Super Contributor
timestamp: June 09, 2020, 10:11:58 am
content: Spellman HV psu can be controlled with a 0-10V input, this one is the type, this seller will accept $300-$350 for it, I think I bought mine from himhttps://www.ebay.com/itm/Spellman-X2287-HV-power-supply-model-PCM50P75X2287-ar/174258856744

author: zrq
author_rank: Frequent Contributor
timestamp: July 31, 2022, 07:08:19 am
content: Hi, when I'm looking around on the ebay for a HVPSU for Xray tubes, I got interested in the same model PCM50P75X2287. Would you mind sharing your experience with driving such Spellman OEM high voltage supply?

author: PartialDischarge
author_rank: Super Contributor
timestamp: July 31, 2022, 08:01:16 am
content: You just need to make a control box with a db25 connector, two potentiometers and a switch iirc, also a multimeter to show the proportional 0-10v

author: zrq
author_rank: Frequent Contributor
timestamp: August 18, 2022, 04:27:43 pm
content: Thanks! Just a late note: some Spellman manuals can be found with google, just search the product family code (PCM in this case).

author: Terry Bites
author_rank: Super Contributor
timestamp: August 19, 2022, 12:23:12 pm
content: I've used ignitor coils from failed gas boiler control PCBs- You can also get them new if you like.Ebay abounds with mini HV modules and coils. Just add your own control loop.Dont forget the bleeder.

author: zrq
author_rank: Frequent Contributor
timestamp: August 30, 2022, 08:33:08 am
content: I just received my Spellman and it turns out the customized (PCM50P75X2287) model has a different control interface from the usual PCM modules. It has a DB25 connector rather than the 15 pin connector on the manual, but on the PCB, it's internally connected to the 15 pin footprint.The wiring for the DB25 connector is:mA Prog: 13kV Prog: 6mA Mon.: 10kV Mon.: 4Enable: 2Interlock Out: 9+10V :23, 24, 25GND: 1, 5Fault: NCSomething unknown: 13, 14Also the local programming potentiometers are not installed, the logic of enable is inverted (grounding to inhibit) and it doesn't seems to have slow start.