Abstract: A circuit arrangement in combination with a first string of series-connected solar modules separated into a first substring and a second substring is provided, wherein each substring includes a first terminal and a second terminal, and further in combination with a solar inverter configured to supply electrical energy from the solar modules to an AC power grid. The arrangement includes a first switch configured to selectively couple the first terminal of the first substring to a first power cable of the inverter, and a second switching circuit configured to selectively couple the second terminal of the first substring to a first terminal of the second substring at a center point, thereby coupling the first and second substrings to form the at least one string.

Abstract: The subject matter of the invention is a backup power system configured to be a UPS system, with a customer generation system and with a network monitoring device with a switch topology including a first connection node, that is connected to the customer generation system that is connected to at least one automatic disconnection switch including a first switch said first switch being disposed between the customer generation system and a utility grid, and that is connected to a second switch that is connected to one or several loads, said system including a second connection node that is connected to said second switch connected to said load, that is connected to a third switch disposed between the utility grid and the load and that is connected to a fourth switch to which there is connected a standalone inverter with a storage device, and said system including a third connection node, connecting said first switch and said third switch to said utility grid, said customer generation system supplying an AC volta

Abstract: Disclosed is a bi-directional battery power inverter (1) comprising a DC-DC converter circuit element (3) to which the battery (2) can be connected in order to generate an AC output voltage from a battery (2) voltage in a discharging mode while charging the battery (2) in a charging mode. The inverter (1) further comprises an HF transformer which forms a resonant circuit along with a resonant capacitor (6). In order to increase the efficiency of said battery power inverter, the transformer is provided with two windings (11, 12) with a center tap (20) on the primary side, said center tap (20) being connected to a power electronic center-tap connection with semiconductor switches (21, 31) while a winding (13) to which the resonant capacitor (6) is serially connected provided on the secondary side.

Abstract: A power converter arrangement configured to convert a direct voltage into an alternating voltage to be supplied to a grid includes a photovoltaic generator configured to generate the direct voltage, a voltage intermediate circuit, a main power converter connected in series with a bypass switch, a maximum power point controller configured to set a maximum power point voltage, and at least one voltage-limited additional circuit configured to be active during a start-up phase of the photovoltaic generator. The at least one voltage-limited additional circuit and the main power converter are configured as a voltage divider in parallel with the photovoltaic generator. The at least one voltage-limited additional circuit is configured as a capacitive voltage divider having a first capacitor and an intermediate circuit capacitor connected in series.

Abstract: A device (1) for feeding electrical energy from an energy source with variable source voltage into an electric power supply network (15), said device (1) including a transformer (112) for galvanic isolation, a resonant inverter (11) with semi-conductor switches (a-d; A, B), one or several resonant capacitors (17; 18, 19; 20, 21) and one rectifier (113), is intended to provide high efficiency and have galvanic isolation. This is achieved in that the resonant inverter (11) is operated in the full resonant mode if the operating voltage is in an operation point (MPP) and in the hard-switching mode if the voltages exceed the operation point (MPP).

Abstract: A power converter circuitry for converting a DC voltage generated by a generator with varying output power in the mean voltage range into an alternating voltage for feeding into a grid, with several series-connected power converters, which are connected in parallel with said generator, as well as with a controllable bridging switch for each power converter, said bridging switch lying in a direct voltage intermediate circuit and bridging the respective power converter in the closed condition, is intended to be used for a photovoltaic generator. This is achieved in that a resistance chopper is connected between each power converter and the generator, no input diode being provided in the current path from the generator to the power converter, and that each bridging switch is connected in parallel with the resistance chopper in the direct voltage intermediate circuit.

Abstract: The present invention relates to a three-phase inverter (1) with a circuit arrangement having a DC-voltage input (2) for at least one direct voltage source, and a three-phase alternating voltage output (15) for feeding into a three-phase alternating voltage mains (19), wherein said inverter comprises a three-phase bridge circuit (20) as well as at least one divided intermediate circuit, wherein said inverter (1) is configured to be transformerless, wherein said neutral conductor (N) of the mains (19) is separated from the central point (M) of the intermediate circuit and the inverter (1) is connected to the alternating voltage mains (19) via a three-conductor connection (15).

Abstract: The object of the invention is a power inverter, the bottom of the housing (1) of the power inverter being configured to be stepped, cooling bodies (10, 11) being disposed on the exterior face of the stepped bottom, at least two printed circuit boards (6, 8) that overlap each other and communicate with the respective one of the cooling bodies (10, 11) through semiconductor components being provided.

Abstract: The subject matter of the invention is a backup power system configured to be a UPS system, with a customer generation system (5) and with a network monitoring device with a switch topology a. including a first connection node, a.1 that is connected to the customer generation system (5) a.2 that is connected to at least one automatic disconnection switch including a first switch (411, 412), said first switch (411, 412) being disposed between the customer generation system (5) and a utility grid (1), and a.3 that is connected to a second switch (44) that is connected to one or several loads (6), b. said system including a second connection node (9) b.1 that is connected to said second switch (44) b.2 connected to said load (6), b.3 that is connected to a third switch (43) disposed between the utility grid (1) and the load (6) and b.4 that is connected to a fourth switch (45) to which there is connected a standalone inverter (7) with a storage device (71), c.

Abstract: A device (1) for feeding electrical energy from an energy source with variable source voltage into an electric power supply network (15), said device (1) including a transformer (112) for galvanic isolation, a resonant inverter (11) with semi-conductor switches (a-d; A, B), one or several resonant capacitors (17; 18, 19; 20, 21) and one rectifier (113), is: intended to provide high efficiency and have galvanic isolation. This is achieved in that the resonant inverter (11) is operated in the full resonant mode if the operating voltage is in an operation point (MPP) and in the hard-switching mode if the voltages exceed the operation point (MPP).

Abstract: In a device for the accommodation and retention of a lock part, in particular a belt lock of a safety belt, with at least one restraint device for the lock part, which has at least one movable latching element that can be brought into a retentive active connection with the lock part, and with an interrogation device having at least one electrical switching element to record the closing position of the restraint device, the electrical switching element is directly assigned to the latching element. The switching element has an actuating element projecting into the movement space of the latching element and is designed as a button that can be actuated by the latching element.

Abstract: In a circuit configuration having a number of electrical components and having at least one line element which electrically connects the components to one another, the line element is a wire-like stamped part which is inserted into the circuit configuration separately from other line elements. The components of this circuit configuration are to be equipped simply and cost-effectively with electrically conductive line elements.

Abstract: Disclosed is a bi-directional battery power inverter (1) comprising a DC-DC converter circuit element (3) to which the battery (2) can be connected in order to generate an AC output voltage from a battery (2) voltage in a discharging mode while charging the battery (2) in a charging mode. The inverter (1) further comprises an HF transformer which forms a resonant circuit along with a resonant capacitor (6). In order to increase the efficiency of said battery power inverter, the transformer is provided with two windings (11,12) with a center tap (20) on the primary side, said center tap (20) being connected to a power electronic center-tap connection with semiconductor switches (21,31) while a winding (13) to which the resonant capacitor (6) is serially connected provided on the secondary side.

Abstract: An inverter (1) with galvanic separation including a resonant converter (2) and an upstream mounted boost chopper (3) is intended to provide galvanic separation in the context of a variable input and output voltage as it exists in photovoltaic systems, with the efficiency being intended to be optimized over the entire input voltage range. This is achieved in that a boost chopper (3) or a buck chopper (4) is mounted upstream of the resonant converter (2).

Abstract: The object of the invention is a power inverter, the bottom of the housing (1) of the power inverter being configured to be stepped, cooling bodies (10, 11) being disposed on the exterior face of the stepped bottom, at least two printed circuit boards (6, 8) that overlap each other and communicate with the respective one of the cooling bodies (10, 11) through semiconductor components being provided.

Abstract: Disclosed is an electronic circuit for the bidirectional conversion of a high input voltage to a direct-current output voltage with indirect coupling, more specifically such a circuit for use in a power supply system for rail vehicles, that is provided with a primary converter, one single common transformer and a secondary converter. The primary converter includes at least three primary converter sections connected in series, the output lines of which are each connected to a respective one of the transformer primary windings.

Abstract: Disclosed is an electronic circuit for the bidirectional conversion of a high input voltage to a direct-current output voltage with indirect coupling, more specifically such a circuit for use in a power supply system for rail vehicles, that is provided with a primary converter, one single common transformer and a secondary converter. The primary converter includes at least three primary converter sections connected in series, the output lines of which are each connected to a respective one of the transformer primary windings.