Abstract: A converter comprises a plurality of controllable two-pole sub-modules connected in series. At least some of the sub-modules each comprises a first and a second sub-module connection, a first, a second, a third and a fourth controllable switch, and a storage dipole, which comprises a first and a second dipole connection, an energy store and a controllable switching device, wherein the controllable switching device has a first selectable switching state, in which the storage dipole outputs no energy, and a second selectable switching state, in which the store of the storage dipole can take up or discharge energy. The sub-module has a selectable conduction state, in which the controllable switching device of the storage dipole assumes the first switching state and the first to fourth switches are switched such that a current flows through the sub-module on two parallel branches.

Abstract: The invention relates to a converter which comprises a plurality of controllable two-pole submodules connected in series. At least some of the aforementioned sub-modules each comprises a first and a second sub-module connection, a first, a second, a third and a fourth controllable switch, and a storage dipole, which comprises a first and a second dipole connection, an energy store and a controllable switching device, wherein the controllable switching device has a first selectable switching state, in which the storage dipole outputs no energy, irrespective of the voltage which is applied between the first and the second storage dipole connection, and a second selectable switching state, in which the store of the storage dipole can take up or discharge energy.

Abstract: The invention relates to a device for converting wind energy into electrical energy. The device is comprised of four legs. One of the legs of the frame has an external recess for mounting on a roof ridge. The frame has a horizontally positioned rotor with a hub and at least two vanes and a generator functionally coupled to the rotor arranged in a central area of the opening formed by the frame. The axis of rotation of the rotor is perpendicular to a plane extending through the legs of the frame.

Abstract: The invention relates to electric machines having permanent excitation, having a very high specific torque and a high power density when correspondingly supplied through power electronics. They are characterized by advantageous production possibilities using composite materials that can be pressed in molds. The nonferrous rotor construction and low required magnet mass results in an extremely low moment of inertia.

Abstract: Switching and switchover devices for DC networks make it possible to realize, particularly in the event of faults, rapid and reliable switching processes in combination with good overvoltage damping and low energy losses during normal operation. The switching devices furthermore have short turn-off times and require no cooling since they have no on-state power losses during normal operation.

Abstract: A sub module for a converter has first and second subunits. Each subunit has an energy storage device, a first series circuit with two power semiconductor switching units, each with a power semiconductor which can be switched on and off, which have the same forward direction and which are conductive in the direction opposite the forward direction. The first series circuit is connected in parallel with the energy storage device. A connection terminal is connected to the potential node between the power semiconductor switching units in the respective series circuit. The first and second subunits are connected via an emitter connection branch, a collector connection branch, and a switching branch with a switching unit connected between the emitter and collector connection branches. At least one power semiconductor switching unit is arranged in the emitter connection branch or the collector connection branch.

Abstract: The invention relates to a device for converting wind energy into electrical energy. The device is comprised of four legs. One of the legs of the frame has an external recess for mounting on a roof ridge. The frame has a horizontally positioned rotor with a hub and at least two vanes and a generator functionally coupled to the rotor arranged in a central area of the opening formed by the frame. The axis of rotation of the rotor is perpendicular to a plane extending through the legs of the frame.

Abstract: A submodule of a high-voltage inverter has a first sub-unit with a first energy storage device, a first series circuit of two power semiconductor switching units connected in parallel with the first energy storage device, each including a switchable power semiconductor, having the same pass-through direction, and each being conductive opposite the nominal pass-through direction. A first connection terminal is connected to the potential point between the power semiconductor switching units of the first series circuit. A second sub-unit has a second energy storage device, a second series circuit of two power semiconductor switching units connected in parallel with the second energy storage device, each including a switchable power semiconductor, having the same pass-through direction, and each being conductive opposite the nominal pass-through direction.

Abstract: The invention relates to power converter circuits which are suitable, in particular, for mobile drive systems with stringent requirements in terms of weight minimization and availability as well as direct attachment to rotating field machines. Inter alia, the strictly modular design of the electronics and the very low expenditure on passive filter elements by virtue of the principle involved are characteristic.

Abstract: Switching and switchover devices for DC networks make it possible to realize, particularly in the event of faults, rapid and reliable switching processes in combination with good overvoltage damping and low energy losses during normal operation. The switching devices furthermore have short turn-off times and require no cooling since they have no on-state power losses during normal operation.

Abstract: The invention relates to power converter circuits which are suitable, in particular, for mobile drive systems with stringent requirements in terms of weight minimization and availability as well as direct attachment to rotating field machines. Inter alia, the strictly modular design of the electronics and the very low expenditure on passive filter elements by virtue of the principle involved are characteristic.

Abstract: A submodule of a high-voltage inverter has a first sub-unit with a first energy storage device, a first series circuit of two power semiconductor switching units connected in parallel with the first energy storage device, each including a switchable power semiconductor, having the same pass-through direction, and each being conductive opposite the nominal pass-through direction. A first connection terminal is connected to the potential point between the power semiconductor switching units of the first series circuit. A second sub-unit has a second energy storage device, a second series circuit of two power semiconductor switching units connected in parallel with the second energy storage device, each including a switchable power semiconductor, having the same pass-through direction, and each being conductive opposite the nominal pass-through direction.

Abstract: The invention relates to electric machines having permanent excitation, having a very high specific torque and a high power density when correspondingly supplied through power electronics. They are characterized by advantageous production possibilities using composite materials that can be pressed in molds. The nonferrous rotor construction and low required magnet mass results in an extremely low moment of inertia.

Abstract: A power electronic circuit arrangement includes functional blocks for controllable, bidirectional energy exchange between a rotating field machine with at least one phase winding and an external energy store with one positive terminal and one negative terminal. At least one functional block is designed as a functional block that is connection-compatible on the power side and includes at least one internal energy store, such that this functional block has at least one additional switching state, in which an output voltage (UX2) is more positive than the positive terminal (P) of the external energy store, and/or in which an output voltage (UX2) is more negative than the negative terminal (N) of the external energy store.

Abstract: A power electronic circuit arrangement includes functional blocks for controllable, bidirectional energy exchange between a rotating field machine with at least one phase winding and an external energy store with one positive terminal and one negative terminal. At least one functional block is designed as a functional block that is connection-compatible on the power side and includes at least one internal energy store, such that this functional block has at least one additional switching state, in which an output voltage (UX2) is more positive than the positive terminal (P) of the external energy store, and/or in which an output voltage (UX2) is more negative than the negative terminal (N) of the external energy store.

Abstract: A power supply includes a direct converter provided in the form of a two-phase or three-phase bridge circuit. The bridge branche of the direct converter includes a serial connection of any number of identical two-terminal networks, each having the following characteristics: The two-terminal networks each have at least one switching state, in which their terminal voltage takes on positive values independent of the magnitude and polarity of the terminal current; the two-terminal networks each have at least one switching state, in which their terminal voltage takes on negative values independent of the magnitude and polarity of the terminal current; the two-terminal networks have at least one internal energy store.

Abstract: A power supply includes a direct converter provided in the form of a two-phase or three-phase bridge circuit. The bridge branche of the direct converter includes a serial connection of any number of identical two-terminal networks, each having the following characteristics: The two-terminal networks each have at least one switching state, in which their terminal voltage takes on positive values independent of the magnitude and polarity of the terminal current; the two-terminal networks each have at least one switching state, in which their terminal voltage takes on negative values independent of the magnitude and polarity of the terminal current; the two-terminal networks have at least one internal energy store.

Abstract: Method and apparatus for controlling a turn-off power converter valve having at least two series connections. Each non-latching power semiconductor switch of this power converter valve has an active collector-emitter limiting circuit. When a rising edge of a drive signal that is provided arrives, a predetermined value of the reference limited voltage of the active collector-emitter limiting circuit is decreased to a low value and is increased to the predetermined value again during a turn-off operation. Using a switch-on command, it is possible to balance the voltage sharing on the non-latching power semiconductor switches of a turn-off power converter valve having at least two series connections.

Abstract: Method and apparatus for controlling a turn-off power converter valve having at least two series connections. Each non-latching power semiconductor switch of this power converter valve has an active collector-emitter limiting circuit. When a rising edge of a drive signal that is provided arrives, a predetermined value of the reference limited voltage of the active collector-emitter limiting circuit is decreased to a low value and is increased to the predetermined value again during a turn-off operation. Using a switch-on command, it is possible to balance the voltage sharing on the non-latching power semiconductor switches of a turn-off power converter valve having at least two series connections.

Abstract: A circuit arrangement protects power semiconductor switches against switching overvoltages. The switches can be switched on and off via their control input and form a pair of arms in a power converter. The circuit arrangement includes a comparator which has a downstream analog amplifier with a limiting characteristic curve and is connected in an electrically conductive fashion on the output side to a control input of the power semiconductor switch to be protected, an actual voltage and a predetermined desired voltage of the main terminal of this power semiconductor switch being present across the comparator. The result is a circuit arrangement for protecting against overvoltages, it being possible to dispense with an RCD wiring network for the power semiconductor switches, since very small voltage deviations are detected immediately and the power semiconductor switch is switched off in a controlled fashion.