Power converter having: - a first connection, a second connection, a third connection and a fourth connection, - energy store connections (5, 6), to which an energy store can be connected, - four inverter bridge branches (24, 25, 26, 27) formed from semiconductor switching means, - wherein the inverter bridge branches (24, 25, 26, 27) each have a centre tap (28, 29, 30, 31), wherein a respective centre tap (28, 29, 30, 31) is assigned to one of the connections (1, 2, 3, 4), and - wherein the inverter bridge branches (24, 25, 26, 27) are connected and can be controlled in such a manner that electrical energy can be transmitted bidirectionally between the energy store connections (5, 6) and the first connection, the second connection, the third connection and/or the fourth connection, - a control unit which is designed to control the semiconductor switching means of the inverter bridge branches (24, 25, 26, 27), - a filter which is looped in between the centre taps (28, 29, 30, 31) of the respective inverter bridge branches (24, 25, 26, 27) and the first connection, the second connection, the third connection and the fourth connection, and - output current sensors (67, 68, 69, 70) which are coupled to the control unit for the purpose of interchanging data and are designed to measure output currents of the power converter, characterized in that - the filter has filter capacitors (55, 56, 57, 58) which are each connected to a centre potential by one of their connections, and - the power converter has filter current sensors (59, 60, 61, 62, 75, 76, 77, 78) which are coupled to the control unit for the purpose of interchanging data and are designed to measure filter currents in the filter capacitors (55, 56, 57, 58, 71, 72, 73, 74), wherein the control unit is designed to carry out current control and/or voltage control on the basis of the measured filter currents, wherein the control unit is designed to determine a current load of the inverter bridge branches (24, 25, 26, 27) on the basis of the measured output currents and the measured filter currents and to control the inverter bridge branches (24, 25, 26, 27) on the basis thereof. - a first connection, a second connection, a third connection and a fourth connection, - energy store connections (5, 6), to which an energy store can be connected, - four inverter bridge branches (24, 25, 26, 27) formed from semiconductor switching means, - wherein the inverter bridge branches (24, 25, 26, 27) each have a centre tap (28, 29, 30, 31), wherein a respective centre tap (28, 29, 30, 31) is assigned to one of the connections (1, 2, 3, 4), and - wherein the inverter bridge branches (24, 25, 26, 27) are connected and can be controlled in such a manner that electrical energy can be transmitted bidirectionally between the energy store connections (5, 6) and the first connection, the second connection, the third connection and/or the fourth connection, - a control unit which is designed to control the semiconductor switching means of the inverter bridge branches (24, 25, 26, 27), - a filter which is looped in between the centre taps (28, 29, 30, 31) of the respective inverter bridge branches (24, 25, 26, 27) and the first connection, the second connection, the third connection and the fourth connection, and - output current sensors (67, 68, 69, 70) which are coupled to the control unit for the purpose of interchanging data and are designed to measure output currents of the power converter, characterized in that - the filter has filter capacitors (55, 56, 57, 58) which are each connected to a centre potential by one of their connections, and - the power converter has filter current sensors (59, 60, 61, 62, 75, 76, 77, 78) which are coupled to the control unit for the purpose of interchanging data and are designed to measure filter currents in the filter capacitors (55, 56, 57, 58, 71, 72, 73, 74), wherein the control unit is designed to carry out current control and/or voltage control on the basis of the measured filter currents, wherein the control unit is designed to determine a current load of the inverter bridge branches (24, 25, 26, 27) on the basis of the measured output currents and the measured filter currents and to control the inverter bridge branches (24, 25, 26, 27) on the basis thereof.