Patent ID: 9553523
Date: 2017-01-24
CPC Classifications: H02M

Claim:
1. A circuit for converting electric power between a three-phase grid and single-phase grid, comprising: a plurality of first transformers, each of the plurality of first transformers having a primary side and a secondary side, the primary side and the secondary side each having a number of windings, and being connected to the three-phase grid; a plurality of first converter stages connected to the plurality of first transformers wherein a number of plurality of first converter stages corresponds to the number of the windings on the secondary side; a plurality of DC intermediate circuits connected to the plurality of first converter stages; and a plurality of second converter stages connected to the plurality of first converter stages; a plurality of series connections including a number of the plurality of second converter stages connected in series with one another at alternating-current outputs of the plurality of second converter stages; and wherein each series connection of the plurality of series connections is respectively connected with a separate input of the plurality of DC intermediate circuits and the plurality of series connections together form a three-phase configuration to be connected to the single-phase grid.