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公开(公告)号：US20250158563A1
公开(公告)日：2025-05-15
申请号：US19021614
申请日：2025-01-15
Applicant: Nextracker LLC
Abstract: A solar tracker system including a tracker apparatus including a plurality of solar modules, each of the solar modules being spatially configured to face in a normal manner in an on sun position in an incident direction of electromagnetic radiation derived from the sun, wherein the solar modules include a plurality of PV strings, and a tracker controller. The tracker controller includes a processor, a memory, a power supply configured to provide power to the tracker controller, a plurality of power inputs configured to receive a plurality of currents from the plurality of PV strings, a current sensing unit configured to individually monitor the plurality of currents, a DC-DC power converter configured to receive the plurality of power inputs powered from the plurality of PV strings to supply power to the power supply, and a motor controller, wherein the tracker controller is configured to track the sun position.
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Patent Agency Ranking
公开(公告)号：US12009690B2
公开(公告)日：2024-06-11
申请号：US18344725
申请日：2023-06-29
Applicant: Nextracker LLC
Inventor： Chen Li , Yang Liu , Mohammed Salmaan Khan , Jonathan Kenzo Kamei , Sandeep Sanjiva Lele
IPC: H02M3/158 , G05F1/56 , G05F1/59 , G05F1/595 , H02J7/35 , H02M1/088 , H02M3/06 , H02S20/32 , G05F1/70 , H02M1/00 , H02M3/00 , H02M3/335 , H02P27/08 , H02S40/32 , H02S40/38
CPC classification number: H02J7/35 , H02M3/1582 , H02S20/32 , G05F1/56 , G05F1/59 , G05F1/595 , G05F1/70 , H02M1/0043 , H02M1/088 , H02M3/01 , H02M3/06 , H02M3/158 , H02M3/33571 , H02P27/08 , H02S40/32 , H02S40/38
Abstract: A power converter converts a medium-voltage output from a solar module to an appropriate voltage to power a solar tracker system. The power converter includes a voltage divider having at least two legs, a first semiconductor switch subassembly coupled in parallel with a first leg of the voltage divider, and a second semiconductor switch subassembly coupled in parallel with a second leg of the voltage divider. The power converter may be a unidirectional or a bidirectional power converter. In implementations, the signals for driving the semiconductor switches of the first and second semiconductor switch subassemblies may be shifted out of phase from each other. In implementations, if the bus voltages to the semiconductor switches are not balanced, the pulse width of the driving signal of the semiconductor switch supplied with the higher bus voltage is decreased for at least one cycle.
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公开(公告)号：US20230344266A1
公开(公告)日：2023-10-26
申请号：US18344725
申请日：2023-06-29
Applicant: Nextracker LLC
Inventor： Chen Li , Yang Liu , Mohammed Salmaan Khan , Jonathan Kenzo Kamei , Sandeep Sanjiva Lele
CPC classification number: H02J7/35 , H02M3/1582 , H02S20/32 , H02P27/08
Abstract: A power converter converts a medium-voltage output from a solar module to an appropriate voltage to power a solar tracker system. The power converter includes a voltage divider having at least two legs, a first semiconductor switch subassembly coupled in parallel with a first leg of the voltage divider, and a second semiconductor switch subassembly coupled in parallel with a second leg of the voltage divider. The power converter may be a unidirectional or a bidirectional power converter. In implementations, the signals for driving the semiconductor switches of the first and second semiconductor switch subassemblies may be shifted out of phase from each other. In implementations, if the bus voltages to the semiconductor switches are not balanced, the pulse width of the driving signal of the semiconductor switch supplied with the higher bus voltage is decreased for at least one cycle.
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公开(公告)号：US11757297B2
公开(公告)日：2023-09-12
申请号：US18075317
申请日：2022-12-05
Applicant: Nextracker LLC
Inventor： Chen Li , Yang Liu , Jonathan Kenzo Kamei
IPC: H01M10/44 , H01M10/46 , H02J7/04 , H02J7/35 , H02J7/00 , H01M8/04858 , H01M4/36 , H01M8/18 , H02S20/32
CPC classification number: H02J7/04 , H01M4/368 , H01M8/04902 , H01M8/188 , H02J7/0068 , H02J7/35 , H02S20/32
Abstract: Systems and methods for managing flow batteries utilize a battery management controller (BMC) coupled between a flow battery and a DC/DC converter, which is coupled to an electrical grid or a photovoltaic device via an inverter. The inverter converts an AC voltage to a first DC voltage and the DC/DC converter steps down the first DC voltage to a second DC voltage. The BMC includes a first power route, a second power route, and a current source converter coupled to the second power route. The BMC initializes the flow battery with a third DC voltage using the current source converter until a sensing circuit senses that the voltage of the flow battery has reached a predetermined voltage. The sensing circuit may include a capacitor, which has a small capacitance and is coupled across each cell of the flow battery, coupled in series between two resistors having very large resistances.
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公开(公告)号：US20230170841A1
公开(公告)日：2023-06-01
申请号：US18072335
申请日：2022-11-30
Applicant: Nextracker LLC
Inventor： Chen Li , Yang Liu , Alexander W. AU
Abstract: A solar tracking system includes a solar array, a support structure configured to support the solar array, a driveshaft coupled to the support structure, a base configured to rotatably support the driveshaft, and an articulation system coupled to the driveshaft and configured to articulate the driveshaft relative to the base. The articulation system includes a gearbox coupled to the driveshaft. The solar tracking system also includes a motor mechanically operably coupled to the gearbox to cause the driveshaft to rotate, and a controller that determines a fault caused by the winding up of the driveshaft, and, in response to determining the fault, shorting the windings of the motor and/or providing power, which is generated by the motor when the unwinding driveshaft drives the rotation of the motor, to a load, such as an energy storage device, a resistive load, and/or a heating element.
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公开(公告)号：US20230170729A1
公开(公告)日：2023-06-01
申请号：US18075317
申请日：2022-12-05
Applicant: Nextracker LLC
Inventor： Chen Li , Yang Liu , Jonathan Kenzo Kamei
CPC classification number: H02J7/04 , H02J7/35 , H02J7/0068 , H01M8/04902 , H01M4/368 , H01M8/188 , H02S20/32
Abstract: Systems and methods for managing flow batteries utilize a battery management controller (BMC) coupled between a flow battery and a DC/DC converter, which is coupled to an electrical grid or a photovoltaic device via an inverter. The inverter converts an AC voltage to a first DC voltage and the DC/DC converter steps down the first DC voltage to a second DC voltage. The BMC includes a first power route, a second power route, and a current source converter coupled to the second power route. The BMC initializes the flow battery with a third DC voltage using the current source converter until a sensing circuit senses that the voltage of the flow battery has reached a predetermined voltage. The sensing circuit may include a capacitor, which has a small capacitance and is coupled across each cell of the flow battery, coupled in series between two resistors having very large resistances.
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