| 摘要 |
The present invention relates to a rectifier circuit with a three-phase rectifier arrangement (1) of semiconductor valves (2), preferably a bridge rectifier circuit of diodes, wherein the rectifier arrangement (1) comprises a three-phase mains input (3) and a DC output (4), and at least one of the three phases (U, V, W) at the mains input (3) is connected to a first pole connection (A) of a three-pole circuit (5) for diverting an injection current (ih3) into the three-pole circuit (5). It is provided in accordance with the invention that each phase (U, V, W) can respectively be connected with a switching element (S1, S2, S3) to the first pole connection (A) of the three-pole circuit (5), and a second and third pole connection (B, C) of the three-pole circuit (5) is respectively connected to an output line (PDC,NDC) of the DC output (4) for control currents (icp,icn), wherein the three-pole circuit (5) comprises controllable semiconductor valves (Scp+,Scp−,Scn+,Scn−), preferably IGBTs, for the active control of the control currents (icp,icn) and/or the injection current (ih3), and at least one choke (7) is arranged on one of the output lines (PDC,NDC) at the DC output (4), and a time-variable load (6) is provided at the DC output (4). |
| 主权项 |
1. A rectifier circuit with a three-phase rectifier arrangement of semiconductor valves, preferably a bridge rectifier circuit of diodes, wherein the rectifier arrangement comprises a three-phase mains input and a DC output, and at least one of the three phases at the mains input is connected to a first pole connection of a three-pole circuit for diverting an injection current into the three-pole circuit, wherein each phase can respectively be connected with a switching element to the first pole connection of the three-pole circuit, and a second and third pole connection of the three-pole circuit is respectively connected to an output line of the DC output for control currents, wherein the three-pole circuit comprises controllable semiconductor valves, preferably IGBTs, for the active control of the control currents and/or the injection current, and at least one choke is arranged on one of the output lines at the DC output, and a time-variable load is provided at the DC output, and wherein the second and third pole connection of the three-pole circuit are respectively connected via a second and third inductor to one of the two output lines of the DC output, and the choke is provided between the second or third pole connection and the load. |
