Patent ID: 9379632
Filing Date: 2016-06-28
CPC Classification: H02J,H02M,Y02E

Claim Text:
1. A power converter comprising: a DC capacitor; semiconductor switch groups, each of which includes two semiconductor switches connected in series to each other; one or a plurality of bridge-cells, each of which includes the DC capacitor and the two semiconductor switches, which are connected in parallel to the DC capacitor; a delta connection unit at which one or a plurality of bridge-cells are delta-connected, each of the bridge-cells being connected in series to each other; a circulating-current control unit configured to generate a common command value common to all three phases of the delta connection unit, the common command value computed from a complex conjugate i wherein the complex conjugate i wherein the DC-capacitor three-phase average value is obtained by averaging voltage values of the DC capacitors at all of the three phases, wherein each DC-capacitor by-phase average value is obtained by averaging voltage values of the DC capacitor at the corresponding phase.