Abstract: An inverter (1) for a grounded direct voltage source, in particular for a photovoltaic generator (2), a battery or a fuel cell, for converting the direct voltage into an alternative voltage with a DC-DC converter (3) and a pulse inverter that is supplied by said DC-DC converter (3), said DC-DC converter (3) being configured to be an oscillating circuit inverter and comprising a series resonant oscillating circuit, said DC-DC converter (3), which is configured to be an oscillating circuit inverter, being configured to be a series-compensated oscillating circuit inverter with a choke (L1) and a series-mounted capacitor array consisting of two or several oscillating circuit capacitors, a rectifier bridge branch including 2 diodes (D3, D4; D5, D6, . . .

Abstract: An inverter (1) for feeding electric power into a utility grid (7) or into a load is described. The inverter (1) contains two direct voltage inputs (2, 3), one first intermediate circuit (8) connected thereto and comprising two series connected capacitors (C1, C2) that are connected together at a ground terminal (14), two alternating voltage outputs (5, 6) of which one at least is provided with a grid choke (L1) and one bridge section (10). In accordance with the invention, a second intermediate circuit (9) that is devised at least for selectively boosting the direct voltage and is intended for supplying the bridge section (10) with positive and negative voltage is interposed between the first intermediate circuit (8) and the bridge section (10).

Abstract: The apparatus for feeding electrical energy into a power grid (8) with a DC voltage converter (2) intended for connection to a DC voltage generator (1) and with an inverter (3) connected thereto and intended for connection to a power grid (8), wherein the inverter contains a bipolar voltage intermediate circuit with two capacitors (C1, C2) that are placed in series and are connected together at a ground terminal (E3) intended for connection to a terminal of the DC voltage generator (1). The DC voltage converter (2) comprises at least two diodes (D3, D4), one switch and one storage choke (16) which is charged by the DC voltage generator (1) when the switch is closed and is discharged via the capacitors (C1, C2) and the diodes (D3, D4) when the switch is open.

Abstract: An inverter (1) for feeding electric power into a utility grid (7) or into a load is described. The inverter (1) contains direct voltage inputs (2, 3), one first intermediate circuit (8) connected thereto and comprising two series connected capacitors (C1, C2) that are connected together at a ground terminal (14), two alternating voltage outputs (5, 6) of which one at least is provided with a grid choke (L1) and one bridge section (10).

Abstract: An inverter (3) is described for feeding electrical energy into a power supply system (2) having in each case one input (6, 7) which is intended for connection to the negative and positive output (4, 5) respectively of a DC voltage generator (1) two outputs (8, 9) which are intended for connection to the power supply system (2), and a device, which has a strong inductor (L1) and switches (S1 to S6), for conversion of a DC voltage to an AC voltage. The input (7) which can be connected to the negative output (5) of the DC voltage generator (1) can be grounded, and at least one of the two outputs (8, 9) is provided with a mains inductor (L2).

Abstract: The device is for feeding electricity into a power grid (8) with a DC generator (1), a DC converter (2) and an inverter (3), and particularly to a DC converter (2) suited for the device. The DC converter (2) comprises a choking coil (15) having two windings (w1, w2) that are magnetically coupled and conductively connected to each other, two switches (86, 86) and three diodes (D6, D7, D8), and is configured such that grounding of the direct current generator (1) at the negative output (5) thereof is possible and the power load of the switches (85, 86) is kept small.

Abstract: A direct current-direct current (DC/DC) converter operated in the resonant mode of operation for converting a direct input voltage into a direct output voltage with a bridge circuit located on the input side and incorporating switching elements, with a resonance circuit incorporating a resonance inductance and a resonance capacitance as well as with a high-frequency transformer for galvanic separation is disclosed, the transformer incorporates at least one primary winding and at least one secondary winding with at least two winding terminals each. The alternating current (AC) output of the bridge circuit is connected to the primary winding and a rectifier bridge with diodes to the secondary winding.

Abstract: The object of the invention is a high-efficiency DC/DC converter, in particular for photovoltaic plants, incorporating a transformerless DC/DC converter operated in the resonant mode of operation for converting a unipolar direct input voltage with an associated positive pole (+) and with a negative pole (?). There is imposed a resonance circuit incorporating at least one resonance inductance and at least one resonance capacitance, each resonance capacitance being connected to a respective one of the rectifier circuit arrangements in such a manner that the bipolar direct output voltage is provided, a voltage boosting circuit arrangement being connected to each resonance capacitance and to the rectifier circuit arrangement.

Abstract: On an inverter for feeding power of a direct voltage source, in particular of a photovoltaic generator (PVG), into an alternating voltage mains (N), with an asymmetrically clocked bridge circuit with at least two first switches (S1, S2) clocked at mains frequency and with at least two second switches (S3, S4) clocked at a higher clock frequency, the efficiency is intended to be improved at low cost. This is achieved in that slow speed switches (S1, S2) of equal temperature stability are utilized for the mains frequency and that fast speed switches (S3, S4) with steeper switching slopes and higher temperature stability are utilized for the higher clock frequency, the fast speed switches (S3, S4) being locally separated from the slow speed switches (S1, S2).

Abstract: The apparatus for feeding electrical energy into a power grid (8) with a DC voltage converter (2) intended for connection to a DC voltage generator (1) and with an inverter (3) connected thereto and intended for connection to a power grid (8), wherein the inverter contains a bipolar voltage intermediate circuit with two capacitors (C1, C2) that are placed in series and are connected together at a ground terminal (E3) intended for connection to a terminal of the DC voltage generator (1). The DC voltage converter (2) comprises at least two diodes (D3, D4), one switch and one storage choke (16) which is charged by the DC voltage generator (1) when the switch is closed and is discharged via the capacitors (C1, C2) and the diodes (D3, D4) when the switch is open.

Abstract: An inverter (1) for feeding electric power into a utility grid (7) or into a load is described. The inverter (1) contains two direct voltage inputs (2, 3), one first intermediate circuit (8) connected thereto and comprising two series connected capacitors (C1, C2) that are connected together at a ground terminal (14), two alternating voltage outputs (5, 6) of which one at least is provided with a grid choke (L1) and one bridge section (10). In accordance with the invention, a second intermediate circuit (9) that is devised at least for selectively boosting the direct voltage and is intended for supplying the bridge section (10) with positive and negative voltage is interposed between the first intermediate circuit (8) and the bridge section (10).

Abstract: An inverter (1) for feeding electric power into a utility grid (7) or into a load is described. The inverter (1) contains direct voltage inputs (2, 3), one first intermediate circuit (8) connected thereto and comprising two series connected capacitors (C1, C2) that are connected together at a ground terminal (14), two alternating voltage outputs (5, 6) of which one at least is provided with a grid choke (L1) and one bridge section (10).

Abstract: An inverter (1) for a grounded direct voltage source, in particular for a photovoltaic generator (2), a battery or a fuel cell, for converting the direct voltage into an alternative voltage with a DC-DC converter (3) and a pulse inverter that is supplied by said DC-DC converter (3), said DC-DC converter (3) being configured to be an oscillating circuit inverter and comprising a series resonant oscillating circuit, said DC-DC converter (3), which is configured to be an oscillating circuit inverter, being configured to be a series-compensated oscillating circuit inverter with a choke (L1) and a series-mounted capacitor array consisting of two or several oscillating circuit capacitors, a rectifier bridge branch including 2 diodes (D3, D4; D5, D6, . . .