I need a power supply with two 100W isolated AC outputs. The output voltage must be a 24V 10kHz sine wave. The load regulation is not so important, what is truly important is the preservation of the sinusoidal wave shape under both rated load and no load conditions. Which SMPS topology is best suited for this purpose?
The first thing that came to my mind is an AC/DC SMPS (PFC + isolated step-down) followed by a PWM inverter. But I think that it is over-complicated for such a seemingly simple task.
The second thought was to get rid of the inverter. Indeed, we already have a rectangular AC voltage after the step-down stage. Maybe we can filter it instead of rectifying? I also found information about resonant converters, and that they can be used as AC/AC converters.
So what do you think about it?
- The input is 230V 50Hz mains.
- Load regulation: 20% is OK.
- The same with THD: 10-20% is OK.
- I'm sorry. I forgot probably the most important thing - efficiency! It should be at the level of an average SMPS, 80% or more.