METHOD OF FREQUENCY CONVERSION Russian patent published in 2017 - IPC H02M5/16 

FIELD: electricity.

SUBSTANCE: in the method of frequency conversion mode the ratio equal to the natural number e (approximately equal to 2.72) in used, so the summation of two mutually inverse functions of voltage gives the resulting smooth function without breaks and with improved harmonic composition. As a result, there are no discontinuities in the output voltage curve.

EFFECT: improvement of the technical and operational characteristics of direct frequency converters, increase of reliability by improving the switching conditions, which enhances the quality of output voltage with the possibility of its significant improvement at the expense of a slight increase in the number of laterals circular winding.

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