i would recommend using a proper IC for the duty-cycle and frequency setting. i assume you are operating in the lower kHz range, so i could recommend the MAX038 from Maxim, which is camable of producing quite precise and stable frequencies up to 20 MHz with perfect duty setting from 5 to 95% without changing the base frequency.
Other method:
Get yourself a Microcontroller ...
recommended: PIC from Microchip or ATMega serias from Atmel.
disadvantage: you gotta learn a programming language ;)
Modern MCs are getting more and more EMC tolerant. If additional means of protection are applied, you won't have too big trouble.
For eyample you could decouple the controller by putting it into a metalline box, powering it by battery and using opto-fibers for signal transmission to the final stage amplifier. The final stage could use HV-tolerant opto-receivers to drive the high-power HV circuits.
Damn I need to get a workroom like yours !!!
All I have is a Bench PSU that goes to 33V and need re-calibrated and a soldering iron , and soon maybe a 0-300VDC power supply .
I am jealous :L
kevj2 2 years ago
i would recommend using a proper IC for the duty-cycle and frequency setting. i assume you are operating in the lower kHz range, so i could recommend the MAX038 from Maxim, which is camable of producing quite precise and stable frequencies up to 20 MHz with perfect duty setting from 5 to 95% without changing the base frequency.
Other method:
Get yourself a Microcontroller ...
recommended: PIC from Microchip or ATMega serias from Atmel.
disadvantage: you gotta learn a programming language ;)
bp72d 3 years ago
disadvantage: HV+Microcontroller anywhere near it = POOF goes the microcontroller, soon followed by one or more really expensive IGBT's
44R0Ndin 2 years ago
Modern MCs are getting more and more EMC tolerant. If additional means of protection are applied, you won't have too big trouble.
For eyample you could decouple the controller by putting it into a metalline box, powering it by battery and using opto-fibers for signal transmission to the final stage amplifier. The final stage could use HV-tolerant opto-receivers to drive the high-power HV circuits.
just some thoughts :)
bp72d 2 years ago