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1. 发明授权

US11614475B2 Method and photovoltaic inverter for determining the insulation resistance of a photovoltaic system to ground 有权
公开(公告)号：US11614475B2
公开(公告)日：2023-03-28
申请号：US17762214
申请日：2021-03-10
申请人： Fronius International GmbH
发明人： Franz Fischereder , Andreas Muehlberger , Juergen Pirchenfellner , Andreas Luger
IPC分类号： G01R31/12 , H02S40/32 , G01R15/04 , G01R19/00 , H02J3/38 , H02S50/00
摘要： A method and a photovoltaic inverter for determining the insulation resistance of a photovoltaic system relative to ground are provided. The voltage required for the measurement can be provided by an intermediate circuit in the form of an intermediate circuit voltage and a measuring device is designed to actuate an input short-circuit switch for short-circuiting a DC input with an AC disconnector open, as a result of which the intermediate circuit voltage can be applied to the DC input in the reverse direction. The measuring device is configured to record measured voltages with a switch of a voltage divider open and closed, and to determine the insulation resistance from the measured values of the two measured voltages recorded with the switch of the voltage divider open and closed.

2. 发明授权

US11559853B2 Method for scanning the surface of metal workpieces and method for carrying out a welding process 有权
公开(公告)号：US11559853B2
公开(公告)日：2023-01-24
申请号：US17601305
申请日：2020-11-17
申请人： Fronius International GmbH
发明人： Manuel Mayer , Andreas Waldhoer , Manuel Binder
IPC分类号： B23K26/082
摘要： Method for scanning the surface (O) of metallic workpieces (W), wherein, during a scanning process before a welding process is carried out, a welding torch (1) with a meltable welding wire (2) is moved over the surface (O) of the workpieces (W), and at predefined times (ti) the welding wire (2) is moved towards the surface (O) of the workpieces (W) until a contact of the welding wire (2) with one of the workpieces (W) is detected, and the position (Pi) of the surface (O) of the workpieces (W) at each time (ti) is determined and stored in the welding power source (4), wherein an edge (K) is determined if the current position (Pi) of the surface (O) of the workpieces (W) exceeds at least one of the stored previous positions (Pi-n) of the surface (O) of the workpieces (W) by a predefined threshold value (S). To reduce the computing effort and to increase processing speed, the end of the edge (K) is determined if the current position (Pi) of the surface (O) of the workpieces (W) remains the same with respect to at least one of the stored previous positions (Pi-n), and if an edge (K) is determined, an edge detection parameter (KP) is set and output together with the current position value (Pi) and transferred to the manipulator (3).

3. 发明申请

US20230018375A1 METHOD FOR PREPARING AN AUTOMATED WELDING METHOD FOR A WELDING PROCESS AND WELDING DEVICE FOR CARRYING OUT AN AUTOMATED WELDING METHOD 有权
公开(公告)号：US20230018375A1
公开(公告)日：2023-01-19
申请号：US17791063
申请日：2021-10-18
申请人： Fronius International GmbH
发明人： Dominik SOELLINGER , Andreas WALDHOER , Josef ARTELSMAIR
IPC分类号： B23K9/173 , B23K9/067 , B23K9/12
摘要： A method for preparing an automated welding method for a welding process moves a welding torch with a consumable welding wire during a movement phase at a positioning speed from an actual to a desired start position of a welding seam, and bridges the distance of the welding wire end from the workpiece during a creep phase. The creep phase is at least partially carried out during the movement phase. The wire is moved toward the workpiece at a first specified forward feed speed until a first wire end-workpiece contact is detected, moved away from the workpiece after first contact detection and then recurrently moved away from the workpiece, and the contact is interrupted again upon detection of further contacts, and the movement of the welding wire towards the workpiece and movement away from the workpiece after the contact is repeated until the start position is reached.

4. 发明申请

US20220373587A1 METHOD AND PHOTOVOLTAIC INVERTER FOR DETERMINING THE INSULATION RESISTANCE OF A PHOTOVOLTAIC SYSTEM TO GROUND 有权
公开(公告)号：US20220373587A1
公开(公告)日：2022-11-24
申请号：US17762214
申请日：2021-03-10
申请人： Fronius International GmbH
发明人： Franz FISCHEREDER , Andreas MUEHLBERGER , Juergen PIRCHENFELLNER , Andreas LUGER
IPC分类号： G01R31/12 , G01R15/04 , G01R19/00 , H02S50/00 , H02S40/32 , H02J3/38
摘要： The invention relates to a method and a photovoltaic inverter (2) for determining the insulation resistance (Riso) of a photovoltaic system (1) relative to ground (PE). According to the invention, the voltage required for the measurement can be provided by the intermediate circuit (6) in the form of the intermediate circuit voltage (UZk), and the measuring device (13) is designed to actuate an input short-circuit switch (SBoost) for short-circuiting the DC input (3) with the AC disconnector (8) open, as a result of which the intermediate circuit voltage (UZk) can be applied to the DC input (3) in the reverse direction, and the measuring device (13) is configured to record measured voltages (UM1, UM2) with the switch (Siso) of the voltage divider (14) open and closed, and to determine the insulation resistance (Riso) from the measured values of the two measured voltages (UM1, UM2) recorded with the switch (Siso) of the voltage divider (14) open and closed.

5. 发明申请

US20220317168A1 METHOD FOR COMMUNICATION BETWEEN TRANSCEIVERS OF MODULE LEVEL DEVICES WITHIN A PHOTOVALTAIC MODULE LEVEL MONITORING SYSTEM 有权
公开(公告)号：US20220317168A1
公开(公告)日：2022-10-06
申请号：US17596709
申请日：2020-06-17
申请人： Fronius International GmbH
发明人： Johann Wilhelm , Christian Fasthuber
IPC分类号： G01R27/02 , H02J3/38 , H04B17/318
摘要： A photovoltaic, PV, module level monitoring system (1) comprising a photovoltaic array (PVA) including at least one photovoltaic string (PVS) comprising photovoltaic modules, PVM, (5) each having a module level device, MLD, (4) adapted to monitor and/or to control the associated photovoltaic module, PVM, (5), wherein each module level device, MLD, (4) comprises a transceiver adapted to communicate with a transceiver of a base station (2) of an inverter (6) connected to said photovoltaic array (PVA), wherein the transceivers are coupled by associated duplexer circuits (7) to a DC power network comprising power cables (3) connecting the photovoltaic modules, PVM, (5) of the at least one photovoltaic string (PVS) of said photovoltaic array (PVA) with the base station (2) of the inverter (6), wherein a signal amplitude of a communication signal, CS, transmitted by a transceiver via its associated duplexer circuit (7) is adjusted automatically depending on a monitored impedance, ZPV, of the respective photovoltaic array (PVA).

6. 发明授权

US11383323B2 Beam-forming and deflecting optical system for a laser machining device, and method for machining a workpiece using a laser beam 有权
公开(公告)号：US11383323B2
公开(公告)日：2022-07-12
申请号：US17438017
申请日：2020-03-10
申请人： Fronius International GmbH
发明人： Stefan Roither , Manuel Binder , Stefan Pichler
IPC分类号： B23K26/06 , G02B27/09 , B23K26/073
摘要： A beam-forming and deflecting optical system for a laser machining device includes at least two optical elements, which are arranged one behind the other in the direction of the laser beam and which are formed by wedges with respective wedge angles, wherein at least one optical element is connected to a drive for the rotation of the optical element about the optical axis, whereby an optical wedge can be rotated relative to the at least one other optical wedge. Also a method for machining a workpiece uses a collimated laser beam. In order to achieve different shapes of the laser beam on the workpiece, each of the optical wedges, which are arranged one behind the other, in each case cover only a part of the laser beam.

7. 发明申请

US20220161345A1 MULTIPLE PULSE WELDING PROCESS 有权
公开(公告)号：US20220161345A1
公开(公告)日：2022-05-26
申请号：US17602336
申请日：2020-04-09
申请人： Fronius International GmbH
发明人： Rupert FRAUENSCHUH , Josef ARTELSMAIR , Dominik SÖLLINGER , Michael MUSS
IPC分类号： B23K9/09 , B23K9/10 , B23K9/095
摘要： In order to synchronize the at least two pulse welding processes performed simultaneously by welding devices in a multiple pulse welding process, the welding devices are connected to one another by a communication link and synchronization information is transmitted via the communication link from a transmitting welding device to at least one receiving welding device. The synchronization information is used in the receiving welding device to synchronize the pulse welding process performed by the receiving welding device with the pulse welding process performed by the transmitting welding device.

8. 发明申请

US20220001765A1 METHOD AND DEVICE FOR CHARGING AN ELECTRIC VEHICLE 有权
公开(公告)号：US20220001765A1
公开(公告)日：2022-01-06
申请号：US17283329
申请日：2020-01-10
申请人： Fronius International GmbH
发明人： Michael SCHUBERT , Markus BRANDSTOETTER
IPC分类号： B60L53/62 , H02J7/00 , H02J7/35 , H02J3/32 , H02J7/02 , H02J3/38 , B60L53/51 , B60L53/63 , B60L53/30
摘要： The invention relates to a method and to a device (3) for charging an electric vehicle (11) with a charging current (IL), having a connection (30) for connecting to a domestic mains supply (16) connected to a power generating plant (1), a power supply grid (6), an energy management device (20), and possibly an energy storage (5), a charging connection (31) for connecting to the electric vehicle (11) to be charged, and a control device (27) for controlling the charging current (IL) for charging the electric vehicle (11). For optimal utilization of the power of an existing power generating plant (1), such as a photovoltaic plant, and thus for particularly cost-effective and efficient charging of the electric vehicle n(11), at least one device is provided for determining the surplus power of the domestic mains supply (16) and the power drawn from the power supply grid (6) and for comparing them with at least one activation threshold (ESSWi) and/or deactivation threshold (ASSWi) is provided, and the control device (27) is designed so that the charging current (IL) for charging the electric vehicle (11) is provided in accordance with the at least two preset charging currents (ILi), by activating or deactivating the corresponding preset charging current (ILi) when the corresponding activation threshold values (ESSWi) or deactivation threshold values (ASSWi) are reached.

9. 发明授权

US10646947B2 Welding wire cartridge with moisture protection 有权
公开(公告)号：US10646947B2
公开(公告)日：2020-05-12
申请号：US15525434
申请日：2015-11-10
申请人： FRONIUS INTERNATIONAL GmbH
发明人： Helmut Ennsbrunner
IPC分类号： B23K9/32 , B23K9/00 , B23K9/133 , B23K9/16 , B23K35/38 , F24F110/20 , F24F11/30 , B01D53/26
摘要： In order to reduce the accumulation of moisture on a welding wire (2, 2′, 2″) arranged in a welding wire cartridge (1, 1a, 1b) or to remove existing moisture in a simple and reliable manner, it is provided that a flow (D1) of purging air supplied to the welding wire cartridge (1, 1a, 1b) is adjusted by a flow control unit (14), the purging air is supplied to the flow control unit (14) at a first pressure (p) and is discharged at a purging air discharge (24) of the welding wire cartridge (1, 1a, 1b) at a third pressure (pat), and at a purging air feed (15) of the welding wire cartridge (1, 1a, 1b) a second pressure (p1) at the purging air feed (15) that is lower than the first pressure (p) results from the adjusted flow (D1), the third flow (pat) and a flow resistance between the purging air feed (15) and the purging air discharge (24), the relative humidity (rF1) of the purging air being reduced by the relief of pressure from the first pressure (p) to the second pressure (p1).

10. 发明申请

US20200036298A1 METHOD FOR OPERATING AN INVERTER, AND INVERTER 审中-公开
公开(公告)号：US20200036298A1
公开(公告)日：2020-01-30
申请号：US16337547
申请日：2017-09-29
申请人： Fronius International GmbH
发明人： Johannes STARZINGER , Martin NAGELMUELLER
IPC分类号： H02M7/5387 , H02M7/49 , H02M7/493
摘要： The invention relates to a method for operating an inverter (1) and to an inverter (1) for converting a direct voltage (UDC) into an alternating voltage (UAC) with a specified grid frequency (fAC) for supplying loads (12) and/or feeding into a supply grid (13), comprising a direct voltage input (2) and multiple AC power units (6) which are connected in parallel and comprise semiconductor switches (7) in a bridge circuit and freewheeling diodes (8) arranged parallel thereto. The outputs of the AC power units (6) are connected to an alternating voltage output (10) via a respective inductivity (9). A common controller (11) is provided for synchronously controlling the semiconductor switches (7) of the AC power units (6) connected in parallel with a switching frequency (fS) in order to prevent imbalances between the parallel AC power units (6), said controller (11) being designed to block the semiconductor switches (7) of the AC power units (6) during individual zero crossings of the output alternating current (IAi) over a specified duration (tF) such that the inductivities (9) can be discharged via the freewheeling diodes (8) of the semiconductor switches (7) and the sub-output currents (IAi) of the parallel AC power units (6) can thus be balanced.

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