公开(公告)号：US11043807B2

公开(公告)日：2021-06-22

申请号：US16600831

申请日：2019-10-14

Applicant: SMA Solar Technology AG

Inventor： Claus Allert ,  Volker Wachenfeld ,  Aleksandra-Sasa Bukvic-Shaefer

IPC: H02J1/14 ,  H02J3/08 ,  H02J3/38 ,  H02J1/00

Abstract: A system for distributing locally generated energy from at least one renewable DC source to a plurality of local load units of the system, including, for each load unit: an input terminal configured to connect to a grid, and an output terminal configured to connect to at least one load. Further for each load the system includes an inverter including an inverter input and an inverter output, wherein the inverter input is connected to the at least one renewable DC source and the inverter output is connected to the input terminal and to the output terminal of the respective load unit, and wherein the inverter is configured to convert a direct current at the inverter input into an alternating current at the inverter output. The system also includes a power meter including a power meter input connected to the input terminal of the respective load unit, wherein the power meter is configured to determine a current power consumption from the grid, and wherein the power meter includes a power meter output connected to the inverter of the respective load unit, and wherein the power meter is configured to transmit data relating to the current power consumption from the grid to the inverter. The inverter of the respective load unit is configured to determine an input DC voltage applied to its inverter input and to determine a power to be currently converted from the applied input DC voltage and the current power consumption data transmitted thereto.

公开(公告)号：US11025055B2

公开(公告)日：2021-06-01

申请号：US16661318

申请日：2019-10-23

Applicant: SMA Solar Technology AG

Inventor： Stefan Buchhold ,  Jens Friebe ,  Michael Kotthaus ,  Torsten Soederberg ,  Thomas Wappler ,  Ephraim Moeser

IPC: H02J1/10 ,  H02J3/38 ,  H01L31/02 ,  H02S40/32 ,  H01L31/05 ,  H02M3/04

Abstract: The disclosure relates to an inverter with at least one inverter bridge and at least two DC converters, the outputs of the DC converters being connected to inputs of the inverter. The inverter includes an exchangeable adapter having input terminals for connection to power sources or loads and output terminals connected via input terminals to inputs of the DC-DC converters. Within the adapter each of the output terminals is connected to one of the input terminals and/or another of the output terminals.

公开(公告)号：US20210076543A1

公开(公告)日：2021-03-11

申请号：US16951064

申请日：2020-11-18

Applicant: SMA Solar Technology AG

Inventor： Martin Anne Dziuba

IPC: H05K9/00 ,  H05K7/14 ,  H05K7/20 ,  H05K5/00

Abstract: An electrical or electronic device with a housing which includes a rear wall and a side wall peripherally surrounding the rear wall, contains a first region and a second region. The first region includes a shielding from the second region with respect to electromagnetic compatibility (EMC). The housing includes a stepped projection on an inner side of the side wall and/or of the rear wall. The shielding for electromagnetic compatibility includes a shielding plate, by means of which the first region is delimited from the second region. An electrical connection of the shielding plate to the side wall and/or to the rear wall is formed in that a peripheral region that delimits the shielding plate areally overlaps the stepped projection, at least along most of its length, and is fastened on it.

公开(公告)号：US10902993B2

公开(公告)日：2021-01-26

申请号：US15375264

申请日：2016-12-12

Applicant: SMA Solar Technology AG

Inventor： Marek Rylko ,  Mariusz Walczak ,  Milosz Handzel ,  Mariusz Gwadera ,  Jakub Hachlowski

IPC: H01F27/28 ,  H01F27/02 ,  H01F27/22 ,  H01F27/30

Abstract: An inductor assembly includes at least one inductor coil, a metallic inductor housing at least partially enclosing the inductor coil, and a potting material both contacting the inductor coil and the metallic inductor housing and thermally coupling the inductor coil to the metallic inductor housing. The inductor coil includes a bobbin made of electrically insulating material, and an inductor winding made of an electric conductor wound on the bobbin. The inductor winding further has an outer circumference and two end faces, and an electric insulation covers the outer circumference of the inductor winding. Coil lids made of electrically insulating material at least partially cover the end faces of the inductor winding and adjacent areas of the electric insulation covering the outer circumference of the inductor winding such that a distance of any point of the end faces of the inductor winding to the metallic housing along any way not passing through the electrically insulating material of the coil lids or the bobbin is at least a required minimum creepage distance.

公开(公告)号：US10804791B2

公开(公告)日：2020-10-13

申请号：US15724447

申请日：2017-10-04

Applicant: SMA SOLAR TECHNOLOGY AG

Inventor： Andrzej Mondzik ,  Adam Penczek ,  Marek Rylko ,  Slawomir Szot ,  Milosz Szarek ,  Robert Stala

IPC: H02M1/08 ,  H03K17/082 ,  H03K17/18

Abstract: The disclosure discloses a driver circuit that is intended for a power semiconductor switch having a unidirectional flow direction and having a control connection, a reference potential connection and a controlled connection. The driver circuit includes a driver module having a control output, a reference potential input and an overvoltage monitoring input. In this case, the control output is connected to a first connection that is provided for connection to the control connection, the reference potential input is connected to a second connection that is provided for connection to the reference potential connection, and the overvoltage monitoring input is connected, via a first diode, to a third connection that is provided for connection to the controlled connection. The overvoltage monitoring input is also connected to the reference potential input via a capacitance. A connection path from the second connection to the third connection via the capacitance and the first diode is switchable in the driver circuit by means of an actively controllable switching element. Furthermore, the disclosure also discloses a circuit arrangement comprising such a driver circuit and a power semiconductor switch with a unidirectional flow direction as well as a bidirectional circuit arrangement comprising two subcircuit arrangements that are each formed by such a circuit arrangement. Such a bidirectional circuit arrangement is used in an inverter having a BSNPC bridge circuit.

公开(公告)号：US20200274459A1

公开(公告)日：2020-08-27

申请号：US15930666

申请日：2020-05-13

Applicant: SMA Solar Technology AG

Inventor： Daniel Premm ,  Vitali Sakschewski

IPC: H02M7/44 ,  H02J3/38 ,  H02J3/18

Abstract: A method and associated apparatus for feeding electric power from a photovoltaic system via a grid connection point into an AC grid having a low short-circuit power is disclosed. The method includes connecting a DC voltage side of at least one first inverter of the photovoltaic system to a photovoltaic generator and an AC voltage side of the at least one first inverter to the grid connection point, wherein the at least one first inverter is operated as a current source, and connecting an AC voltage side of a second inverter of the photovoltaic system to the grid connection point, wherein the second inverter is operated as a voltage source based on measurement values of an AC voltage measured in the region of the photovoltaic system and a predefined characteristic curve. For a first total short-circuit power of all first inverters operated as a current source, and a second total short-circuit power of the AC grid and of the second inverter operated as a voltage source, a ratio of the second total short-circuit power to the first total short-circuit power is greater than or equal to 2.

公开(公告)号：US20200274350A1

公开(公告)日：2020-08-27

申请号：US15930625

申请日：2020-05-13

Applicant: SMA Solar Technology AG

Inventor： Claus Allert ,  Thomas Wegener ,  Dietrich Linke

IPC: H02H7/18 ,  H02J7/00

Abstract: A power supply apparatus includes at least one inverter, and at least one battery connected to the inverter. The inverter includes a control device, an AC-side connection for a grid, and at least one DC battery connection for connecting the at least one battery and an inverter bridge. Two poles of the battery are connected to the DC battery connection of the inverter via supply lines for the purpose of charging and discharging the battery, and a control line is connected to the battery. The apparatus also includes a shutdown apparatus. The power supply apparatus is configured, in an operating state and due to a shutdown control action of the shutdown apparatus, to shut down or prevent at least a clocking of an inverter bridge of the inverter, and to remove an enabling signal, applied to the control line, for the battery such that the battery opens at least one connection for charging and discharging the battery between at least one of its two poles and the inverter.

公开(公告)号：US10720775B2

公开(公告)日：2020-07-21

申请号：US15336021

申请日：2016-10-27

Applicant: SMA Solar Technology AG

Inventor： Niels Berger

IPC: H02J3/38 ,  H02J1/10 ,  H02M3/04 ,  H02M7/44 ,  H05K5/02

Abstract: A converter module for converting electrical power by means of a converter circuit having at least one power electronic semiconductor switch driven in a clocked manner is disclosed. The converter module includes a housing, a first DC link circuit terminal, and a capacitance arranged in the housing and connected to the first DC link circuit terminal and to the converter circuit and serving for stabilizing a DC voltage present at the first DC link circuit terminal. The converter module includes a second DC link circuit terminal, which is connected to the capacitance and to the first DC link circuit terminal, wherein the first and second DC link circuit terminals are designed for connection to DC link circuit terminals of further converter modules for converting electrical power. An inverter can be formed by at least two converter modules which are connected to one another via a respective one of their DC link circuit terminals.

公开(公告)号：US10666043B2

公开(公告)日：2020-05-26

申请号：US16197447

申请日：2018-11-21

Applicant: SMA Solar Technology AG

Inventor： Markus Hopf

IPC: H03K3/00 ,  H03K3/64 ,  H01H35/00 ,  H01H83/00 ,  H02H7/20 ,  H01L31/05 ,  H02S40/32 ,  H02S50/00 ,  H02S40/36 ,  H02J3/38

Abstract: A description is given of an apparatus for disconnecting a connection between solar modules of a photovoltaic string. A circuit breaker, a band-stop filter and a supply circuit are arranged in a series circuit between a first and second terminal. The series circuit is configured to conduct a current that includes a DC string current flowing through the photovoltaic string and a high-frequency control signal modulated onto the DC string current. The supply circuit is configured to generate energy to power the apparatus from the DC string current. An AC bypass circuit bridges the circuit breaker in parallel and is configured to conduct the high-frequency control signal. A control unit is configured to operate the apparatus based on the high-frequency control signal. A reverse current diode oppositely polarized relative to an operating current flow is connected in parallel with the circuit breaker or the circuit breaker and the band-stop filter.

公开(公告)号：US10530274B2

公开(公告)日：2020-01-07

申请号：US16294065

申请日：2019-03-06

Applicant: SMA Solar Technology AG

Inventor： Burkard Mueller ,  Klaus Rigbers ,  Wilfried Vogt

IPC: H02M7/5387 ,  H02M1/32 ,  H02J3/38

Abstract: A method for operating a transformerless inverter includes operating first and second half-bridges of the inverter using a unipolar clocking method as a first clocking method, determining a value of a grid-frequency stray current at the DC terminals of the inverter during the unipolar clocking method, and when a limit value is exceeded by the stray current value, operating the first and second half-bridges of the inverter using a stray-current-reducing clocking method as a second clocking method in which the first half-bridge provides an AC voltage at the first AC output, wherein an amplitude of the AC voltage is less than 50% of the amplitude of a voltage amplitude of the grid, and the second half-bridge provides a difference voltage between the grid voltage and the voltage provided by the first half-bridge at the first AC output.