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Registered Member #1051
Joined: Tue Oct 09 2007, 06:23PM
Location: Montreal
Posts: 3
Hi,
I'm designing a high voltage resonant switching power supply for corona discharge to make Ozone. I was wondering if anybody knows somewhere I can find a voltage controlled high voltage SMPS. In order to know the exact output voltage to apply to the ozonator for my design, I need a variable HV SMPS, preferably a resonant one that can vary from 120V to 5kV or 10kV and that can support up to 500W.
Also, if anybody has good references on HV resonant SMPS for Ozone application, please let me know.
Registered Member #10
Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424
You need 500W of 5 to 10 kV? Possibilities for me (being a bit simple when it comes to transistory things): 1 Rewire an inverter microwave oven's transformer with more turns. Remove the litz wire and use something thinner. A ZVS driver is not variable but is simple. 2 Same arrangement but with several parallel flybacks (I have a box of 50 identical new ones) 3 Single 555/IGBT driving a flyback or 3
Realistically you should probably be able to find a nice SMPS something on Steve Wards or Steve Connors site that does things elegantly using IGBT's with a half bridge. Heck, you could even have it play music as well
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Alain Nahid wrote ...
I need a variable HV SMPS, preferably a resonant one that can vary from 120V to 5kV or 10kV and that can support up to 500W.
This is how would I do it: Get two cores from flyback transformers and wind a coil on each core that is calculated for 1/2 maximum needed output voltage, then connect these coils in series, with "center" grounded.
To power the transformers, use a halfbridge of MOSFETs (IRFP460 etc.). Use a PWM chip (tl494, sg3525 etc) to drive gate drivers which then drive a GDT which powers the FETs gates. Use the PWM feature of the chip to vary output power/voltage.
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HV SMPS
