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

Claim 4:
5. An on-board charger (OBC), comprising:
a power factor corrector (PFC) comprising a three phase active front end (AFE) connected to an 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 a power value which is equal to a rated reference maximum power extracted from a three phase electrical grid PMAX3∅ from any type of AC electrical grid to which the OBC is connected, the OBC comprising 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 and the AC electrical grid;
wherein in response to the AFE of the PFC being connected to a three phase electrical grid, the three switches SW1, SW2, SW3 are actuated to an open state such that switches SW1 and SE2 interrupt current flowing between the phrase arms of the three phase AFE, wherein the third switch SW3 interrupts current flowing between the three phase electrical grid and the diodes arms, so that the three switches SW1, SW2, SW3 and the diodes arm do not conduct current;
wherein in response to the AFE of the PFC being connected to a single phase electrical grid, the three switches SW1, SW2, SW3 are actuated to 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
wherein in response to the AFE of the PFC being connected to a split-phase or a two phase electrical grid, the three switches SW1, SW2, SW3 are actuated to 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.