Granted Patent B2

US 12,445,040 · App. 17/711,732 · Granted Oct 14, 2025

Inventors: André Koerner (Lippstadt, DE); Martin Dierkes (Paderborn, DE); Christian Buhlheller (Lippstadt, DE)

Assignee: Hella GmbH & Co. KGaA

H02M1/10H02M7/2173H02J7/02H02J2207/20H02M1/15H02M7/797

Abstract

Claims (49)

1. A method for rectifying two-phase current from a two-phase alternating current source with the aid of a bidirectional power converter:

wherein the bidirectional power converter comprises:

a first power converter valve half-bridge comprising two controlled power converter valves;

an intermediate circuit;

a three-phase alternating current input and output;

a first power converter stage having a first input/output and a second input/output; and

a second power converter stage having a first input/output and a second input/output and a direct current input/output,

wherein the first input/output of the first power converter stage is electrically connected to the three-phase alternating current input/output,

wherein the second input/output of the first power converter stage is electrically connected to the intermediate circuit,

wherein the first input/output of the second power converter stage is electrically connected to the intermediate circuit,

wherein the second input/output of the second power converter stage is electrically connected to the direct current output,

wherein the first power converter stage comprises a controlled six-pulse bridge circuit comprising six controllable power converter valves arranged in three half-bridges, including inductors between the three-phase alternating current inputs and the bridge center points of the half-bridges,

wherein the intermediate circuit includes a capacitor half-bridge comprising a first capacitor and a second capacitor,

wherein the first capacitor is connected to a first connection of the second input/output of the first power converter stage and a first connection of the first input/output of the second power converter stage and to the second capacitor,

wherein the second capacitor is connected to a second connection of the second input/output of the first power converter stage and a second connection of the first input/output of the second power converter stage and to the first capacitor,

wherein a connecting point between the first capacitor and the second capacitor is connected to a neutral conductor connection of the three-phase alternating current input/output,

wherein the first power converter valve half-bridge comprising the two controlled power converter valves is connected to the first connection and the second connection of the second input/output of the first power converter stage, and whose connecting point between the power converter valves of the first power converter valve half-bridge is connected to the connecting point of the capacitor half-bridge via a first inductor,

wherein the bidirectional power converter does not include a transformer,

wherein the first power converter valve half-bridge is formed by a first of the half-bridges of the controlled six-pulse bridge circuit,

wherein the first power converter stage includes a first switch, and

wherein the method comprises:

connecting the power converter to the two-phase alternating current source via a second outer conductor and a third outer conductor connection of the three-phase alternating current input/output, the first switch being in the switch position, in which a conductive connection exists from the connecting point of the first power converter valve half-bridge to the connecting point of the capacitor half-bridge via the first inductor; and

controlling the first power converter stage so that the power converter valves of the first power converter valve half-bridge regulate a voltage over the first and/or second capacitor of the capacitor half-bridge.

2. A method for rectifying single-phase current from a single-phase alternating current grid or for inverting direct current from a direct current grid with the aid of a bidirectional power converter:

wherein the bidirectional power converter comprises:

a first power converter valve half-bridge comprising two controlled power converter valves;

an intermediate circuit;

a three-phase alternating current input and output;

a first power converter stage having a first input/output and a second input/output; and

a second power converter stage having a first input/output and a second input/output and a direct current input/output,

wherein the first input/output of the first power converter stage is electrically connected to the three-phase alternating current input/output,

wherein the second input/output of the first power converter stage is electrically connected to the intermediate circuit,

wherein the first input/output of the second power converter stage is electrically connected to the intermediate circuit,

wherein the second input/output of the second power converter stage is electrically connected to the direct current output,

wherein the first power converter stage comprises a controlled six-pulse bridge circuit comprising six controllable power converter valves arranged in three half-bridges, including inductors between the three-phase alternating current inputs and the bridge center points of the half-bridges,

wherein the intermediate circuit includes a capacitor half-bridge comprising a first capacitor and a second capacitor,

wherein the first capacitor is connected to a first connection of the second input/output of the first power converter stage and a first connection of the first input/output of the second power converter stage and to the second capacitor,

wherein the second capacitor is connected to a second connection of the second input/output of the first power converter stage and a second connection of the first input/output of the second power converter stage and to the first capacitor,

wherein a connecting point between the first capacitor and the second capacitor is connected to a neutral conductor connection of the three-phase alternating current input/output,

wherein the first power converter valve half-bridge comprising the two controlled power converter valves is connected to the first connection and the second connection of the second input/output of the first power converter stage, and whose connecting point between the power converter valves of the first power converter valve half-bridge is connected to the connecting point of the capacitor half-bridge via a first inductor,

wherein the bidirectional power converter does not include a transformer,

wherein the first power converter valve half-bridge is formed by a first of the half-bridges of the controlled six-pulse bridge circuit,

wherein the first power converter stage includes a first switch,

wherein the method comprises:

connecting the power converter to the single-phase alternating current grid via a third outer conductor connection of the three-phase alternating current input/output, the first switch being in the switch position, in which a conductive connection exists from the connecting point of the first power converter valve half-bridge to the connecting point of the capacitor half-bridge via the first inductor; and

controlling the first power converter stage so that the power converter valves of the first power converter valve half-bridge regulate a voltage over the first and/or second capacitor of the capacitor half-bridge,

wherein the second switch is in the switch position, in which a conductive connection exists from the connecting point of a second power converter valve half-bridge to the second connection of the second input/output of the first power converter stage via a series circuit comprising the second inductor and a third capacitor, and

wherein, by controlling the first power converter stage, the power converter valves of the second power converter valve half-bridge regulate a voltage over the capacitor half-bridge.

3. The method according to claim 2 , wherein the second power converter valve half-bridge is operated as an active ripple filter, using the third capacitor as a storage capacitor.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (13)