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公开(公告)号：US12126275B2
公开(公告)日：2024-10-22
申请号：US17912693
申请日：2021-03-19
CPC分类号： H02M7/487 , H02M1/0012 , H02M1/32
摘要： In order to protect an inverter from prohibited switching states, a monitor including monitoring inputs and monitoring outputs is provided. The monitoring inputs are connected to the control outputs in order to receive the switching patterns, and the monitoring outputs are connected to the power switches. The monitor is designed to compare a transition from a first switching pattern to a second switching pattern with a number of prohibited transitions and/or with a number of permitted transitions and block the second switching pattern in the event of a match with one of the prohibited transitions and/or in the event of a deviation from the number of permitted transitions and to output the second switching pattern to the power switches via the monitoring outputs in the event of a deviation from the number of prohibited transitions and/or in the event of a match with one of the permitted transitions.
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公开(公告)号：US11303133B2
公开(公告)日：2022-04-12
申请号：US17267616
申请日：2019-08-12
发明人： Ruben Overbeck , Gerhard Wallisch
摘要： A photovoltaic inverter has a DC input for connection to a DC source, a DC-DC converter, an intermediate circuit, a DC-AC converter, an AC disconnector, a control device, an AC connection for connection to a supply network and, if present, a consumer, a battery stage, and a battery connection for connection to a buffer battery, and a method operates a photovoltaic inverter of this kind. A switched-mode power supply is connected on the input side to the AC connection and on the output side to the battery stage so that, if the DC source is deactivated, the intermediate circuit can be charged up to a threshold value via the switched-mode power supply and the battery stage, whereupon the AC disconnector can be actuated and the photovoltaic inverter can be connected to the supply network.
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公开(公告)号：US11626792B2
公开(公告)日：2023-04-11
申请号：US17258526
申请日：2019-07-30
摘要： An inverter includes a DC/DC converter which converts a direct current received from a DC voltage source into an intermediate circuit voltage of an intermediate circuit, a DC/AC converter which converts the intermediate circuit voltage into an AC voltage, and a monitoring unit which monitors capacitors of the intermediate circuit for protection against overvoltages. If an overvoltage occurs at one of the capacitors of the intermediate circuit the overvoltage unit decouples the DC voltage source from the intermediate circuit by actuating the DC/DC converter.
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公开(公告)号：US11125833B1
公开(公告)日：2021-09-21
申请号：US17274245
申请日：2019-10-03
发明人： Gerhard Wallisch , Joachim Danmayr
IPC分类号： G01R31/02 , G01R31/327 , G01R31/42 , H02S50/00 , H02S40/32 , G01R31/00 , H01H47/00 , H01H11/00
摘要： The invention relates to a method for testing a disconnection point (12) of a photovoltaic inverter (1) and to a photovoltaic inverter (1) of this type. According to the invention, in a testing mode, an auxiliary voltage (U_Lx) is applied between the input (E_Lx) of each line (Lx) of the disconnection point (12) and an intermediate circuit potential (M), in each case, the first switching contacts (SW_Lx,1) are closed and the second switching contacts (SW_Lx,2) are opened alternately and vice versa, according to a switching pattern, and, for each switching pattern, the voltages (U_Lx,GD; U_MN) between the output (A_Lx) of each line (Lx) of the disconnection point (12) and the intermediate circuit potential (M) are measured, and the functionality of each switching contact (SW_Lx,j) is derived from the measured voltages (U_Lx,GD; U_MN).
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公开(公告)号：US20210143729A1
公开(公告)日：2021-05-13
申请号：US17258526
申请日：2019-07-30
摘要： Inverter (1) comprising a DC/DC converter (4) which converts a direct current received from a DC voltage source (3) into an intermediate circuit voltage of an intermediate circuit (5), a DC/AC converter (6) which converts the intermediate circuit voltage into an AC voltage, and comprising a monitoring unit (8) which monitors capacitors of the intermediate circuit (5) for protection against overvoltages, the over-voltage unit (8), if an overvoltage occurs at at least one of the capacitors of the intermediate circuit (5), decoupling the DC voltage source (3) from the intermediate circuit (5) by actuating the DC/DC converter (4).
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