Patent ID: 7499297
Filing Date: 2009-03-03
Classification: H02M

Abstract:
1. A polyphase converter circuit having p≧3 phases (R, Y, B) and a converter circuit element provided for each phase (R, Y, B), each converter circuit element having a single rectifier unit, a DC voltage circuit which is connected to the rectifier unit and an inverter unit which is connected to the DC voltage circuit, and a first AC voltage output of each inverter unit forming a phase connection, and second AC voltage outputs of the inverter units being star-connected, wherein n transformers are provided, each having a primary winding and m three-phase secondary windings, where n≧2 and m≧3, wherein p sets of secondary windings are provided, each set of secondary windings being formed by in each case  three-phase secondary windings of each transformer, and wherein each set of secondary windings with the associated secondary windings is connected to the rectifier unit of a respective converter circuit element.