Patent ID: 6930899

Claim:
An n-point-converter circuit, consisting: a maximum of two converter valves for each converter phase electrically connected in series at corresponding valve connection points, each converter valve having a maximum of (n−1) turn-off semiconductor switches; a voltage intermediate circuit having a maximum of (n−1) capacitors electrically connected in series at corresponding capacitor connection points, each capacitor connection point defining a corresponding DC potential; and a maximum of (n−2) cross arms, each cross arm having a maximum of (n−1) semiconductor switches, of which at least two are anti-serially connected, wherein free ends of the series-connected converter valves form DC-side terminals, said DC-side terminals connected electrically in parallel with the voltage intermediate circuit, and wherein the (n−2) cross arms connect the valve connection point of each series-connected pair of the converter valves with a corresponding one of the intermediate potentials of the voltage intermediate circuit capacitor connection points.