I've noticed mains voltage tends to be 120V +/- 10% for 108-132VAC.
How would you go about building a regulated AC-to-AC power supply which works off of mains and outputs 120VAC with a much lower (less than 1%) variation?
The output must be a sine wave at 120Vrms.
Edit: For those asking, the output would be fairly low, 1.5A - 2A, 2.25A max.
Simulated output: +/- 0-100KV DC.
The objective here would be to connect components in the order:
mains --> power conditioner --> variac --> 1:46 center-tapped transformer insulated for high voltage --> Cockcroft Walton Multiplier outlined above.
To achieve a variable 0-100KV DC (effectively 0-200KV DC with both channels factored in) power supply.
I am not certain the power conditioning stage is the way to go but assumed it would be since it is much easier to stabilize low voltage (120Vrms) than it is to stabilize high voltage (5.52KVrms.) Relatively minor ripple of 5% will grow into +/- 10% by the end of the CW stage at full power, yielding around 20KV off of the expected value - not an insignificant amount.