Patent ID: 8817840

Claim:
A power supply arrangement for supplying a square-wave current ( 12 ) to a load connected to an output of the power supply arrangement, comprising: a transformer (TU) including at least two primary-side taps ( 1 U 1 , 1 U 2 ) which form an input of the power supply arrangement, and a secondary winding of the transformer (TU) having a plurality of secondary-side taps ( 2 U 1 , 2 U 2 , 2 U 3 , 2 UN); a bridge circuit (BU) comprising: a plurality of first half bridges ( 11 , 12 , 13 ) which include convener valves (V 11 , V 12 , V 13 , V 14 , V 15 , V 16 ) and which each have a first terminal (A 11 , A 12 , A 13 ) of the bridge circuit, a bridge section with a choke (L 1 ), and a second half bridge ( 20 ) which has converter valves (V 17 , V 18 ) and a second terminal (A 20 ) of the bridge circuit (BU), wherein each first terminal (A 11 , A 12 , A 13 ) is connected to one of the secondary-side taps ( 2 U 1 2 U 2 , 2 U 3 ) of the transformer (TU), wherein the second terminal (A 20 ) is connected to the output; wherein the plural secondary side-taps ( 2 U 1 , 2 U 2 , 2 U 3 , 2 UN) include a first end tap ( 2 U 1 ), an opposite second end tap ( 2 UN) and at least one intermediate tap ( 2 U 2 , 2 U 3 ) disposed therebetween; the first end tap ( 2 U 1 ) and each of the at least one intermediate tap ( 2 U 2 , 2 U 3 ), respectively, are connected with the first terminal (A 11 , A 12 , A 13 ) of the plural first half bridges ( 11 , 12 , 13 ); wherein each of the first half bridges ( 11 , 12 , 13 ) has a first converter valve (V 11 , V 13 , V 15 ) and a second converter valve (V 12 , V 14 , V 16 ); and wherein the second half bridge ( 20 ) comprises a first converter valve (V 17 ) and a second convener valve (V 18 ); cathodes of the first converter valve (V 11 , V 13 , V 15 ) of each of the first half bridges ( 11 , 12 , 13 ) are connected to a cathode of the first converter valve (V 17 ) of the second half bridge ( 20 ) at a first node (BK 1 ) of the bridge circuit; anodes of the second converter valve (V 12 , V 14 , V 16 ) of each of the first half bridges ( 11 , 12 , 13 ) are connected to an anode of the second convener valve (V 18 ) of the second half bridge ( 20 ) at a second node (BK 2 ) of the bridge circuit; wherein in each first half bride an anode of a first converter valve (V 11 , V 13 , V 15 ) of the two converter valves and a cathode of a second converter valve (V 12 , V 14 , V 16 ) of the two converter valves is connected to the first terminal (A 11 , A 12 ,A 13 ) of the bridge circuit (BU) arranged in the bridge section.