Patent ID: 8284577
Filing Date: 2012-10-09
Classification: H02M

Abstract:
1. A method for operation of a converter circuit having first and second partial converter systems connected in series to one another via two series-connected inductances, a junction point of the two series-connected inductances forming an output connection, each partial converter system having at least one two-pole switching cell, and each switching cell having two series-connected controllable bidirectional power semiconductor switches with a controlled undirectional current flow direction, and a capacitive energy store connected in parallel with a series circuit formed by the power semiconductor switches, the method comprising: controlling the power semiconductor switches in the switching cells of the first partial converter system with a first control signal, the first control signal being formed from a voltage oscillation signal across the inductances and a first switching function for the power semiconductor switches in the switching cells of the first partial converter system; and controlling the power semiconductor switches in the switching cells in the second partial converter system with a second control signal, the second control signal being formed from the voltage oscillation signal across the inductances and a second switching function for the power semiconductor switches in the switching cells of the second partial converter system, wherein the first and second switching functions are formed by a voltage oscillation signal with respect to a voltage at the output connection, and a reference signal.