No, no. There are many converters with high frequency DC/DC converter and pwm output stage on the market.As far as i know all commercially available sine wave inverters in the market right now are bulky low frequency transformer based.
50 Hz transformer inverters can be made by backyard small business without much electronic skills and still have good life expectancy.If this is for general home use, I strongly recommend you stick with the big old heavy clunky transformer inverter. It will run refrigerators and flourescent lights with ease and just occasionally harmlessly blow the occasional fuse.
This is very true, but the inverter designer knows that with a motor drive or a grid tie inverter pretty much what the operating conditions are going to be. So many Hp motor, or so many Kw grid tie. Its possible to design suitable protection that will work well within reasonable limits that can be thoroughly tested.5
But you should also consider that high voltage inverters are made in x 100 million quantity for variable frequency drives and quite a lot for grid tied solar power. They can be designed reliably and fully overload protected these days.
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