SMPS to Pure Sine

[EUVL]

I remember the Mark Levinson ML33 using its own sine generator to "purify" the mains voltage before rectifying.

Has anyone tried that?

How about a switching mode PSU, driving a high power Class D amp (Hypex or what not), using a low-distortion sine oscillator as input, and then connect the ouput of the Class D amp to rectifiers and caps of a "linear" PSU ?

And one doesn't have to stick to 50Hz or 60Hz either.


Patrick

[Eva]

The "conceptually optimum" approach would be to use a PFC converter to get quasi-regulated DC from AC with sinusoidal current consumption and then use a DC-DC converter with appropriate outputs.

Why so much effort in producing a clean sine wave if you are immediately going to rectify and chop it resulting in plenty of harmonics?

[star882]

And resonant DC/DC converters will give a surprisingly sinusoidal waveform.