Abstract: A converter arrangement has at least one AC voltage connection, at which an alternating current can be fed in or drawn, and at least one DC voltage connection, at which a direct current can be fed in or drawn. The converter arrangement contains at least two series circuits connected in parallel. The external connections of the series circuits form the DC voltage connections of the converter arrangement. Each of the series circuits is connected in parallel and contains in each case at least two submodules connected in series, each of the submodules containing at least two switches and a capacitor. An energy store is to be connected to the capacitor of at least one of the submodules, wherein a filter is connected electrically between the capacitor and the energy store.

Abstract: A submodule charges or discharges an energy store and contains a capacitor unit and a power semiconductor circuit having power semiconductors that can be switched on and off. The capacitor unit and the power semiconductor circuit are connected to each other such that, after actuating the power semiconductors, the voltage released at the capacitor unit or a zero voltage can be produced at output terminals of the submodule. In order to provide a submodule allowing individual adaptation of the charging operation to the requirements of the energy store which, is cost-effective, the energy store is connected to the submodule via a DC-DC regulator. The regulator is connected to the capacitor unit and is configured to convert a capacitor voltage into a charge voltage that is required for charging the energy store, and to convert a discharge voltage released at the energy store during discharge into the capacitor voltage.

Abstract: A converter assembly has at least one a.c. voltage terminal at which an alternating current can be fed in or tapped and at least one d.c. voltage terminal at which a direct current can be fed in or tapped. The converter assembly includes at least two series connections, which are connected in parallel and the external terminals of which form d.c. voltage terminals of the converter assembly. Each of the series connections that are connected in parallel includes at least two sub-modules that are connected in series, each formed with at least two switches and a capacitor. At least one of the sub-modules has a terminal at which electrical energy can be drawn from the sub-module or electrical energy can be fed into the sub-module.

Abstract: A converter arrangement has at least one AC voltage connection, at which an alternating current can be fed in or drawn, and at least one DC voltage connection, at which a direct current can be fed in or drawn. The converter arrangement contains at least two series circuits connected in parallel. The external connections of the series circuits form the DC voltage connections of the converter arrangement. Each of the series circuits is connected in parallel and contains in each case at least two submodules connected in series, each of the submodules containing at least two switches and a capacitor. An energy store is to be connected to the capacitor of at least one of the submodules, wherein a filter is connected electrically between the capacitor and the energy store.

Abstract: A submodule charges or discharges an energy store and contains a capacitor unit and a power semiconductor circuit having power semiconductors that can be switched on and off. The capacitor unit and the power semiconductor circuit are connected to each other such that, after actuating the power semiconductors, the voltage released at the capacitor unit or a zero voltage can be produced at output terminals of the submodule. In order to provide a submodule allowing individual adaptation of the charging operation to the requirements of the energy store which, is cost-effective, the energy store is connected to the submodule via a DC-DC regulator. The regulator is connected to the capacitor unit and is configured to convert a capacitor voltage into a charge voltage that is required for charging the energy store, and to convert a discharge voltage released at the energy store during discharge into the capacitor voltage.