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公开(公告)号：US11522383B2
公开(公告)日：2022-12-06
申请号：US16436710
申请日：2019-06-10
Applicant: NEXTracker Inc.
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
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：US20210091713A1
公开(公告)日：2021-03-25
申请号：US17115595
申请日：2020-12-08
Applicant: NEXTRACKER INC.
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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公开(公告)号：US20190305163A1
公开(公告)日：2019-10-03
申请号：US16364959
申请日：2019-03-26
Applicant: NEXTracker Inc.
IPC: H01L31/053 , H02J7/35 , H02S10/20
Abstract: A multi-power source system including a first power source, a second power source in a parallel with the first power source, and a diode preventing power from the second power source to drive the first power source but permitting the first power source to charge the second power source. The system also includes a controller operably coupled to both the first and second power sources, and a plurality of field effect transistor (FETs) arranged in series with one or more of the first power source, the second power source, and the load, wherein controller can switch the plurality of FETs to enable the first power source to drive the load or the second power source to drive the load.
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公开(公告)号：US11722000B2
公开(公告)日：2023-08-08
申请号：US17437037
申请日：2020-02-25
Applicant: NEXTracker Inc.
Inventor： Chen Li , Yang Liu , Mohammad Salmaan Khan , Jonathan Kenzo Kamei , Sandeep Sanjiva Lele
IPC: H02M3/158 , H02M3/06 , G05F1/70 , G05F1/56 , G05F1/59 , H02M1/088 , H02J7/35 , H02S20/32 , H02P27/08 , H02S40/38 , H02S40/32 , G05F1/595 , H02M1/00 , H02M3/00 , H02M3/335
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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Patent Agency Ranking
公开(公告)号：US20210273604A1
公开(公告)日：2021-09-02
申请号：US17320999
申请日：2021-05-14
Applicant: NEXTracker Inc.
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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公开(公告)号：US20190356265A1
公开(公告)日：2019-11-21
申请号：US15983718
申请日：2018-05-18
Applicant: NEXTracker Inc.
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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公开(公告)号：US10892703B2
公开(公告)日：2021-01-12
申请号：US15983718
申请日：2018-05-18
Applicant: NEXTracker Inc.
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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公开(公告)号：US20220181975A1
公开(公告)日：2022-06-09
申请号：US17437037
申请日：2020-02-25
Applicant: NEXTracker Inc.
Inventor： Chen Li , Yang Liu , Mohammad Salmaan Khan , Jonathan Kenzo Kamei , Sandeep Sanjiva Lele
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：US10651739B1
公开(公告)日：2020-05-12
申请号：US16284807
申请日：2019-02-25
Applicant: NEXTracker Inc.
Inventor： Chen Li , Yang Liu , Mohammad Salmaan Khan , Jonathan Kenzo Kamei , Sandeep Sanjiva Lele
IPC: H02M3/158 , G05F1/70 , H02M3/335 , H02S20/32 , H02P27/08 , H02S40/38 , H02J7/35 , H02S40/32 , G05F1/595 , H02M3/06
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. 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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