Swapping transformer I/O

Where would you get 220V for the input? The US is 240V.

High voltage output switchers are rare.

PFC modules output around 400 DC and lots of power, but aren't isolated.

lørdag den 1. juli 2023 kl. 23.35.56 UTC+2 skrev John Larkin:

there's one in the inverter, likely something like this:

From my measurement of 250V DC (around 12% higher) out of 220V DC. 340V AC would only give around 384V DC. 429V DC out of 380V AC would be better.

Alternatively, I am going to try a 24 to 380 reverse transformer. It might be easier to adjust input between 20V to 24V.

Full bridge rectifier and 82uF 450V capacitor. Steady reading of 450V DC. I can try out a different inverter.

I got 170V DC if i connect my rectifier to the 110V outlet. So, i am sure the circuit is working fine.

asier to adjust input between 20V to 24V.

Ordered a 10W version to test. Will get the 100W version if it works.

Correction: 450V DC to 350V DC.

Correction again: measured 250V DC out of 220V AC inverter.

Sure, if something is powered off the AC line, there needs to be protections and the design should be able to be UL and CE certified. One would always apply 120 volts, or whatever, to a transformer's 120 volt primary.

Fortunately, we electronics guys don't connect to the AC line a lot ourselves any more; we can buy listed AC switch/filter/connector things and listed switching power supplies. Or, whenever possible, use a wart. There are some monster 24 and 48 volt warts and laptop supplies around these days.

I don't want nasty line voltage in my beautiful little boxes!