Electrical power converter unit, an electrical power conversion device and an industrial vehicle including this electrical power converter unit

An electrical power converter unit, including:

• a first connection interface including two leads forming a DC input/output interface for connecting a first electrical device to the power converter unit;
• a three-phase rectifier power converter circuit including:
• six switches connected by pairs, the pairs of switches being connected in parallel between the two leads of the first connection interface,
• first, second and third arms each connected to a middle point of a pair of switches;
• a second connection interface for connecting a second electrical device to the power converter unit, the second connection interface including first, second and third connection terminals respectively connected to an end of the first, second and third arms of the power converter circuit;
• wherein the second connection interface includes a switching unit adapted to switch between:
• a DC input/output mode, in which the first, second and third arms of the power converter circuit are electrically connected together, forming one DC input/output;
• and
• an AC input/output mode, in which the first, second and third terminals of the second connection interface are disconnected from each other, forming separate input/output terminals for a three-phase AC voltage,
• wherein the switching unit includes electronic switches and is adapted to be controlled by an electronical control unit in order to switch between the AC and DC input/output modes,
• wherein the first terminal is connected to an end of the first arm through a first electrical conductor, the second terminal is connected to an end of the second arm through a second electrical conductor and the third terminal is connected to an end of the third arm through a third electrical conductor,
• and wherein a first electronic switch of the switching unit is connected between the first and second terminals or between the first and second conductors or between the first arm and the second arm, and a second electronic switch is connected between the second and third terminals or between the second and third conductors, or between the second arm and the third arm, the first and second electronic switches being in an electrically blocking state in the AC input/output mode and are in an electrically passing state in the DC input/output mode.