公开(公告)号：US20170019027A1

公开(公告)日：2017-01-19

申请号：US15281474

申请日：2016-09-30

Applicant: SMA Solar Technology AG

Inventor： Andreas Knobloch

IPC: H02M3/158 ,  H02J3/38 ,  H02M1/44

CPC classification number: H02M3/158 ,  H02J3/383 ,  H02M1/44 ,  H02M3/07 ,  H02M2003/1586 ,  Y02E10/563

Abstract: In order to reduce spurious emissions of a current converter or voltage converter having at least one power switch which is actuated with an actuating signal, wherein each actuating signal comprises switch-on pulses spaced apart from one another, and wherein pulse widths of the switch-on pulses are modulated in order to meet a specification for a current or a voltage in or at the current converter or voltage converter, the pulse widths are additionally varied more quickly and more strongly than is appropriate for meeting the specification in order to change the spectrum of the spurious emissions. In this context, changes to the pulse widths when they additionally vary compared to the pulse widths that would result only owing to their modulation to meet the specification are made on the basis of successive groups of changes which each extend over a predefined number of successive switch-on pulses and in which a sum of the changes is zero in each case. The successive groups of changes are varied with respect to at least one aspect which is selected from absolute values of the changes, signs of the changes, a sequence of the changes and an extent of the group.

Abstract translation: 为了减少具有由致动信号致动的至少一个电源开关的电流转换器或电压转换器的杂散发射，其中每个致动信号包括彼此间隔开的开启脉冲，并且其中开关 - 调制开关脉冲以满足电流转换器或电压转换器中或其中的电流或电压的规格，脉冲宽度可以更加快速地和更强烈地变化，以适应于满足规范以改变频谱 的杂散发射。 在这种情况下，当脉冲宽度与仅由于其调制才能达到规格而产生的脉冲宽度相比变化时，会根据连续的变化组进行改变，每组变化各自延伸超过预定数量的连续开关 在每种情况下，其中变化的和为零。 连续的变化组相对于从变化的绝对值，变化的迹象，变化的顺序和组的范围中选择的至少一个方面而变化。

公开(公告)号：US20220304184A1

公开(公告)日：2022-09-22

申请号：US17831867

申请日：2022-06-03

Applicant: SMA Solar Technology AG

Inventor： Klaus Rigbers ,  Thomas Wappler ,  Gerrit Braun ,  Andreas Knobloch ,  Matthias Rehbein

IPC: H05K7/20 ,  H05K7/14 ,  H05K1/18

Abstract: An inverter with a rated power of at least 3 kVA includes a first assembly which includes a first printed circuit board and a DC/AC converter stage, and a second assembly which includes a second printed circuit board and an EMC filter for the DC/AC converter stage. The first printed circuit board is mounted on a heat sink and lies substantially flat on the heat sink, and the DC/AC converter stage has converter components which comprise power semiconductors, chokes and link circuit capacitors. The chokes and the link circuit capacitors are arranged together on one side of the first printed circuit board, and the heat sink is arranged on the opposite side of the first printed circuit board, and the chokes and/or the power semiconductors are thermally connected to the heat sink via the first printed circuit board and a thermally conductive material arranged between the first printed circuit board and the heat sink. The second printed circuit board is arranged on the side of the first printed circuit board opposite the heat sink, and a metal sheet is arranged between the first assembly and the second assembly, and the second printed circuit board is mounted on the metal sheet.

公开(公告)号：US20180191270A1

公开(公告)日：2018-07-05

申请号：US15907336

申请日：2018-02-28

Applicant: SMA Solar Technology AG

Inventor： Pablo Ignacio Correa Vasquez ,  Andreas Knobloch

IPC: H02M7/487 ,  H02M7/5387 ,  H02M1/36 ,  H02M1/08 ,  G01R19/165 ,  G01R31/04 ,  G01R31/42

CPC classification number: H02M7/487 ,  G01R19/16547 ,  G01R31/041 ,  G01R31/42 ,  H02M1/08 ,  H02M1/32 ,  H02M1/36 ,  H02M7/53871 ,  H02M2001/0009

Abstract: A method and system for operating an inverter, which has a terminal with four conductor connectors for connection of the inverter to three outer conductors and to a neutral conductor of an AC voltage grid is disclosed. The method includes determining a connection configuration of the inverter to the AC voltage grid by actuating switching elements of a bridge circuit of the inverter to generate a zero-phase sequence system having a zero-phase sequence system current, and measuring and evaluating output currents of the inverter with respect to the zero-phase sequence system current. The method also includes identifying a presence of a connection of the neutral conductor to a conductor connector provided for connection to the neutral conductor when the zero-phase sequence system current exceeds a prescribed threshold value and identifying that the neutral conductor is not connected to the conductor connector provided for connection to the neutral conductor otherwise.

公开(公告)号：US11409316B2

公开(公告)日：2022-08-09

申请号：US17015254

申请日：2020-09-09

Applicant: SMA Solar Technology AG

Inventor： Andreas Knobloch

IPC: G05F1/67 ,  H02S40/32 ,  H02J3/38

Abstract: A method for operating an energy generation system containing a photovoltaic generator and an inverter, wherein electric power is transferred between the inverter and an AC voltage grid, and wherein the transferred electric power comprises an active power (P) and a reactive power (Q) is disclosed. The method includes operating the photovoltaic generator, in a first operating mode, at a maximum active power point (MPP) by way of the inverter, and setting the active power (P) of the photovoltaic generator via the inverter in a second operating mode depending on a grid frequency instantaneous value (f) and on a grid frequency rate of change (df/dt), and in the second operating mode, setting the reactive power (Q) depending on a grid voltage instantaneous value (U) and on a grid voltage rate of change (dU/dt).

公开(公告)号：US09941794B2

公开(公告)日：2018-04-10

申请号：US15281474

申请日：2016-09-30

Applicant: SMA Solar Technology AG

Inventor： Andreas Knobloch

IPC: H02M1/14 ,  H02M3/158 ,  H02M1/44 ,  H02J3/38 ,  H02M3/07

CPC classification number: H02M3/158 ,  H02J3/383 ,  H02M1/44 ,  H02M3/07 ,  H02M2003/1586 ,  Y02E10/563

Abstract: In order to reduce spurious emissions of a current converter or voltage converter having at least one power switch which is actuated with an actuating signal, wherein each actuating signal comprises switch-on pulses spaced apart from one another, and wherein pulse widths of the switch-on pulses are modulated in order to meet a specification for a current or a voltage in or at the current converter or voltage converter, the pulse widths are additionally varied more quickly and more strongly than is appropriate for meeting the specification in order to change the spectrum of the spurious emissions. In this context, changes to the pulse widths when they additionally vary compared to the pulse widths that would result only owing to their modulation to meet the specification are made on the basis of successive groups of changes which each extend over a predefined number of successive switch-on pulses and in which a sum of the changes is zero in each case. The successive groups of changes are varied with respect to at least one aspect which is selected from absolute values of the changes, signs of the changes, a sequence of the changes and an extent of the group.

公开(公告)号：US20230187942A1

公开(公告)日：2023-06-15

申请号：US18097535

申请日：2023-01-17

Applicant: SMA Solar Technology AG

Inventor： Andreas Knobloch ,  Christian Hardt ,  Mats Bernsdorff ,  Daniel Premm

IPC: H02J3/38 ,  H02J7/00 ,  H02J3/16 ,  G05B19/042

CPC classification number: H02J3/38 ,  G05B19/042 ,  H02J3/16 ,  H02J7/0048 ,  G05B2219/2639

Abstract: In a method for operating a power supply plant having a plurality of inverters and a plant controller connected to the inverters for communication, the power supply plant has a grid connection, which is connected to an AC voltage grid. Via the grid connection, the inverters exchange electrical interchange powers with the AC voltage grid such that the power supply plant exchanges a total interchange power, composed of the respective electrical interchange powers, with the AC voltage grid. By means of a respective regulator, the inverters adjust their respective interchange powers depending on a respective deviation of a voltage profile of a grid voltage from a respective reference profile with respect to a respective reference frequency and/or depending on a respective voltage amplitude differential between a respective grid voltage and a respective reference voltage. The plant controller influences the regulators of the inverters depending on a power differential between the total interchange power and a specified interchange power. A power supply plant according to the application is designed to carry out this method.

公开(公告)号：US20230084081A1

公开(公告)日：2023-03-16

申请号：US17993007

申请日：2022-11-23

Applicant: SMA Solar Technology AG

Inventor： Andreas Knobloch

IPC: H02J3/38 ,  H02J1/10 ,  H02J1/14 ,  H02J3/32 ,  H02J7/35

Abstract: A method for stabilizing a DC voltage in a DC grid that includes a DC bus connected to a higher-order grid and to which an energy generating system and at least one load are connected. A variable electric grid output is exchanged between the DC bus and the higher-order grid in order to keep the DC voltage in the DC bus at a nominal voltage. The energy generating system includes a PV generator connected to the DC bus via a DC-to-DC converter and which exchanges an electric generator output with the DC bus. In a normal operating mode, the generator output is set to a normal operating output by the DC-to-DC converter on the basis of an MPP output of the PV generator. In a grid support mode, the generator output is set to a grid support output on the basis of the DC voltage in the DC bus in order to counteract a power imbalance between the electric power supplied in total to the DC bus and the power drawn in total from the DC bus.

公开(公告)号：US10333426B2

公开(公告)日：2019-06-25

申请号：US15907336

申请日：2018-02-28

Applicant: SMA Solar Technology AG

Inventor： Pablo Ignacio Correa Vasquez ,  Andreas Knobloch

IPC: H02M7/537 ,  H02M7/487 ,  G01R31/42 ,  G01R29/16 ,  G01R31/02 ,  H02M1/36 ,  G01R19/165 ,  G01R31/04 ,  H02M1/08 ,  H02M7/5387 ,  H02M1/32 ,  H02M1/00

Abstract: A method and system for operating an inverter, which has a terminal with four conductor connectors for connection of the inverter to three outer conductors and to a neutral conductor of an AC voltage grid is disclosed. The method includes determining a connection configuration of the inverter to the AC voltage grid by actuating switching elements of a bridge circuit of the inverter to generate a zero-phase sequence system having a zero-phase sequence system current, and measuring and evaluating output currents of the inverter with respect to the zero-phase sequence system current. The method also includes identifying a presence of a connection of the neutral conductor to a conductor connector provided for connection to the neutral conductor when the zero-phase sequence system current exceeds a prescribed threshold value and identifying that the neutral conductor is not connected to the conductor connector provided for connection to the neutral conductor otherwise.

公开(公告)号：US12262515B2

公开(公告)日：2025-03-25

申请号：US17831867

申请日：2022-06-03

Applicant: SMA Solar Technology AG

Inventor： Klaus Rigbers ,  Thomas Wappler ,  Gerrit Braun ,  Andreas Knobloch ,  Matthias Rehbein

IPC: H05K7/20 ,  H02M7/00 ,  H05K1/18 ,  H05K7/14

Abstract: An inverter with a rated power of at least 3 kVA includes a first assembly which includes a first printed circuit board and a DC/AC converter stage, and a second assembly which includes a second printed circuit board and an EMC filter for the DC/AC converter stage. The first printed circuit board is mounted on a heat sink and lies substantially flat on the heat sink, and the DC/AC converter stage has converter components which comprise power semiconductors, chokes and link circuit capacitors. The chokes and the link circuit capacitors are arranged together on one side of the first printed circuit board, and the heat sink is arranged on the opposite side of the first printed circuit board, and the chokes and/or the power semiconductors are thermally connected to the heat sink via the first printed circuit board and a thermally conductive material arranged between the first printed circuit board and the heat sink. The second printed circuit board is arranged on the side of the first printed circuit board opposite the heat sink, and a metal sheet is arranged between the first assembly and the second assembly, and the second printed circuit board is mounted on the metal sheet.

公开(公告)号：US12081031B2

公开(公告)日：2024-09-03

申请号：US17993007

申请日：2022-11-23

Applicant: SMA Solar Technology AG

Inventor： Andreas Knobloch

IPC: H02J3/38 ,  H02J1/10 ,  H02J1/14 ,  H02J3/32 ,  H02J7/35

CPC classification number: H02J3/381 ,  H02J1/102 ,  H02J1/14 ,  H02J3/32 ,  H02J7/35 ,  H02J2300/26 ,  H02J2300/28

Abstract: A method is disclosed for stabilizing a DC voltage in a DC grid that includes a DC bus connected to a higher-order grid and to which an energy generating system and at least one load are connected.