TRANSFORMER WITH THREE-PHASE AND CIRCULAR WINDINGS Russian patent published in 2014 - IPC H01F30/14 H02M5/14 

FIELD: electricity.

SUBSTANCE: invention relates to electric engineering and may be used in multi-phase semiconductor converters, in particular, in rectifiers, inverters and frequency converters. A transformer with rotary magnetic field, three-phase and circular windings comprises an inner laminated magnetic conductor made of plates with semi-closed slots for full height of coil groups, where a three-phase winding and a circular winding are laid with taps. An external laminated magnetic conductor in the form of a hollow cylinder, which is moved onto the inner laminated magnetic conductor with an air gap, providing for necessary linearity of the main magnetisation curve by rotary magnetic field, providing for improved spectral composition of the magnetic field curve, and closing main magnetic flux, developed by windings arranged in slots of the inner magnetic conductor.

EFFECT: technical result consists in increased quality of supply and output voltage of a controlled converter, increased capacity, efficiency and coefficient of transformer and converter capacity as a whole.

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