Abstract: A method for operating an on-board HV charging system configured to charge a traction battery of an electric vehicle, the on-board HV charging system having a Power Factor Correction (PFC) circuit to convert AC power from a mains supply into DC power for use in charging the traction battery, a bi-directional High Voltage to High Voltage (HVHV) DCDC converter electrically coupled to the traction battery; a DC link capacitor electrically coupled between the PFC circuit and the HVHV DCDC converter; and a bi-directional High Voltage to Low Voltage (HVLV) DCDC converter electrically coupled between the traction battery and a 12 V battery. The method controls the PFC circuit, HVHV DCDC converter, in a reverse mode, and the HVLV DCDC converter, in a reverse mode, to pre-charge the DC link capacitor using electrical power from the 12 V battery.

Abstract: A device for charging and discharging a capacitive actuator connectable to an output connection has a first capacitor disposed between an input connection and a reference potential. The device has a series connection composed of a first and a second power switching element which is connected in parallel with the first capacitor. The device additionally has a first coil with a first connection connected to the center tap of the series connection, wherein the second connection of the first coil is connected to the reference potential via a third power switching element and to the output connection via a fourth power switching element. Wherein the power switching elements have diodes connected in parallel therewith such that they are reverse-biased from the input connection or the output connection to the reference potential. Wherein a connection of the fourth power switching element is connected to the input connection via a diode.

Abstract: A device for charging and discharging a capacitive actuator connectable to an output connection has a first capacitor disposed between an input connection and a reference potential. The device has a series connection composed of a first and a second power switching element which is connected in parallel with the first capacitor. The device additionally has a first coil with a first connection connected to the center tap of the series connection, wherein the second connection of the first coil is connected to the reference potential via a third power switching element and to the output connection via a fourth power switching element. Wherein the power switching elements have diodes connected in parallel therewith such that they are reverse-biased from the input connection or the output connection to the reference potential. Wherein a connection of the fourth power switching element is connected to the input connection via a diode.