Patent ID: 11881760
Assignee: MAHLE INTERNATIONAL GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 0:
1. A method for extracting a power value which is equal to a rated reference maximum power extracted from a three phase electrical grid PMAX3∅ from an AC electrical grid with an on-board charger (OBC) that comprises a power factor corrector (PFC) having a three phase active front end (AFE) connected to the AC electrical grid, a DC/DC converter receiving a regulated DC voltage from the PFC and configured to charge a high voltage battery, the OBC being configured to extract the power value and including three switches SW1, SW2 and SW3 and a diodes arm having diodes D1 and D2 connected in series between a high and low side of the AFE, whereby two switches SW1 and SW2 are arranged between the AFE and the AC electrical grid and are able to interrupt current flowing between phase arms of the three phase AFE, wherein the third switch SW3 is arranged on a line connecting the diodes arm to the AC electrical grid, the method comprising:
in response to the PFC being connected to a three phase electrical grid, extracting the power value by actuating the three switches SW1, SW2 and SW3 in an open state such that the switches SW1 and SW2 interrupt current flowing between the phase arms of the three phase AFE, wherein the third switch SW3 interrupts current flowing between the three phase electrical grid and the diodes arm, so that the three switches SW1 SW2 and SW3 and the diodes arm do not conduct current;
in response to the PFC being connected to a single phase electrical grid, extracting the power value by actuating the three switches SW1, SW2 and SW3 in a closed state, wherein the diodes arm conducts current so that the switches SW1 and SW2 allow current to flow between the phase arms of the three phase AFE, wherein the third switch SW3 is closed to allow current to flow between the single phase electrical grid and the diodes arm; and
in response to the PFC being connected to a split-phase or a two phase electrical grid, extracting the power value by actuating the three switches SW1, SW2 and SW3 in a closed state such that the switches SW1 and SW2 allow current to flow between the phase arms of the three phase AFE, wherein the third switch SW3 is closed to allow current to flow between the diodes arm and one line of the split-phase or the two phase electrical grid.