The Natural Philosopher wrote:

[...]
Ergo these days we rectify, smooth and chop and transform at much higher
freqs than 50hz to get power at different voltages or to achieve current
limiting. And that gets rid of 100hz flicker too..or should,

The flicker will only disappear if you use a large capacitor as a
storage element; usually this is found on the HV side of the inverter.
This brings back the reliability problem: it is asking a lot of a big
capacitor to survive for many years when it is potentially exposed to
occasional mains glitches from one side and continuously exposed to the
switching current waveform on the other.

For a given energy storage capacity, capacitors are smaller, lighter and
cheaper than metal-cored chokes, but it is a lot more difficult to make
them as reliable in the long term.


--
~ Adrian Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk