Electrical converter

An electrical converter for conversion between a three-phase AC signal and a DC signal, the electrical converter comprising:

• three phase terminals (A, B, C),
• a first DC terminal (P) and a second DC terminal (N),
• a conversion circuitry for conversion between three phase voltages of the three-phase AC signal provided at the three phase terminals (A, B, C) and a first and second intermediate voltage at a first and second intermediate node (x, y) of the electrical converter,
• a first buck circuit comprising at least one first switch-node terminal that is operably connected to the first DC terminal (P) and a second buck circuit comprising at least one second switch-node terminal that is operably connected to the second DC terminal (N), wherein the first and the second buck circuits are connected between the first intermediate node (x) and the second intermediate node (y) for conversion between the first and second intermediate voltage and the three phase voltages, on one hand, and the DC signal between the first and second DC terminals (P, N), on the other hand,
• wherein the first buck circuit comprises three first devices that are actively switchable for connecting the at least one first switch-node terminal to any one of the three phase terminals (A, B, C), and in that the second buck circuit comprises three further first devices that are actively switchable for connecting the at least one second switch-node terminal to any one of the three phase terminals (A, B, C),
• wherein the first buck circuit comprises at least one second device that is switchable and connected between the first intermediate node (x) and the at least one first switch-node terminal, and at least one first filter inductor connected between the at least one first switch-node terminal and the first DC terminal (P) and wherein the second buck circuit comprises at least one further second device that is switchable and connected between the second intermediate node (y) and the at least one second switch-node terminal, and at least one second filter inductor connected between the at least one second switch-node terminal and the second DC terminal (N),
• wherein the first and the second buck circuits are connected in series between the first intermediate node (x) and the second intermediate node (y) such that there is a common node (m) of the first and second buck circuit;
• wherein the first buck circuit comprises at least one third device connected between the common node (m) and the at least one first switch-node terminal;
• wherein the second buck circuit comprises at least one further third device connected between the common node (m) and the at least one second switch-node terminal.