MULTIZONE DIRECT TO ALTERNATE CURRENT CONVERTER Russian patent published in 2014 - IPC H02M7/00 H02M7/217 

FIELD: electricity.

SUBSTANCE: invention can be applied in controlled AC drives and as a controlled second converter in frequency converters with intermediate DC stage. Device includes current source, 3-phase bridge circuit where each bridge arm consists of 2 groups of n serial controlled unidirectional rectifier cells, to connection points of which at each bridge arm two extra groups of uncontrolled rectifier cells are added so that one group of n controlled rectifier cells is connected by cathode of the outmost cell to a load and by anode of the other outmost cell to positive pole of current source, second group of controlled rectifier cells is connected by anode of outmost cell to a load and with cathode to negative pole of current source, diodes of the first extra group, with its cathodes towards the load, are inserted between anode of serial controlled rectifier cells and load, and similarly, diodes of the second extra group, with its anodes towards the load, are inserted between cathodes of controlled rectifier cells of the second group and load.

EFFECT: simple multizone direct to alternate current converter with enhanced weight and dimensions, reduced reverse voltage in rectifier cells, fewer inductance coils and improved power parameters, leading to simplified converter design.

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