You do realize that different countries use different plugs?they can just plug it in.
You do realize that different countries use different plugs?they can just plug it in.
Not so. 120VAChalf wave rectified is the same as 120VAC full wave rectified, assuming no load. So about 170V peak.120 full wave rectified and 240 half rectified yeild the same DC to start with, the DC-DC converter uses that value as the from value.
Above is a cut away portion of a switched 115 / 230 VAC input PSU. I believe it illustrates what dendad is getting at. Note what the selector switch does in this case. I doubt you will find this design used much anymore and most new switch mode power supplies have auto voltage and run between 90 and 250 VAC at the AC input. The above was only a 200 watt ATX form factor PSU too.What they do is to use 120VAC into a voltage doubler, and 240VAC into a full wave bridge. A clue is the power supplies have 2 high voltage caps in the primary supply. The rectifier circuit is basically the same. just the feed point is changed.
Such a changeover can be done with relay switching of transformer taps, a method that would be fine even for air conditioners. That is a lot different from just having an automatic changeover for a switchmode power supply. This sudden change to include an Air conditioner puts a whole different scheme on the whole project.I basically wanted to be able to run an air conditioner, battery charger, and a few other devices from wall power in the US or Europe without having to change anything about my system so someone doesn't have to be aware of what they're doing, they can just plug it in.
I still stand by the idea of two versions for each country/jurisdiction, should be all that much cheaper to produce also.I basically wanted to be able to run an air conditioner, battery charger, and a few other devices from wall power in the US or Europe without having to change anything about my system so someone doesn't have to be aware of what they're doing, they can just plug it in.