Voltage limiter for Cockroft/ walton cap charger

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SUMMARY

The discussion centers on designing a voltage limiting circuit for a Cockcroft-Walton voltage doubler, specifically to limit the input AC voltage to 200 volts while maintaining functionality. The mains voltage is approximately 220 volts, and the output voltage from the doubler should not exceed 400 volts to stay within the safe operating range of 500V-rated capacitors. A feedback loop is suggested as a potential solution for voltage regulation, while safety concerns are highlighted as critical considerations in the design process.

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Electrical engineers, hobbyists designing high-voltage circuits, and anyone involved in capacitor charging applications will benefit from this discussion.

mahela007
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Hello,
I'm trying to design a capacitor charging circuit using a Cockroft-walton voltage doubler circuit.
My mains voltage is ~220 Volts and the output would be 220*2 = 440.
My capacitors are rated for 500V which means that they can be charged safely to about 400V.

Is there a circuit which would allow me to limit the voltage coming into the voltage doubler to [an upper limit of] exactly 200 volts ? The output of this voltage limiting circuit must also be AC, otherwise the voltage doubler wouldn't work.

I've also read this thread which is focused on the voltage multiplier part of this question.
https://www.physicsforums.com/showthread.php?t=412640
 
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You could always use a feedback loop to adjust the input voltage.

Beware the safety problems that other thread talks about.
 

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