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公开(公告)号：US20240195351A1
公开(公告)日：2024-06-13
申请号：US18588584
申请日：2024-02-27
申请人： Nextracker LLC
CPC分类号： H02S30/10 , F16M11/2021 , H02S20/32
摘要： A pier for a solar tracking system includes a bearing housing assembly, a frame, the frame defining an A-profile having a pair of legs and a crown at a center portion thereof, and a mounting bracket, the mounting bracket coupled to a portion of the crown of the frame at a first portion thereof and coupled to a portion of the bearing housing assembly at a second portion thereof.
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公开(公告)号：US20240014751A1
公开(公告)日：2024-01-11
申请号：US18349577
申请日：2023-07-10
申请人： NEXTRACKER LLC
发明人： Matthias Preindl , Yang Liu , Alexander W. AU
IPC分类号： H02M7/5395 , H02J3/38 , H02M1/12
CPC分类号： H02M7/5395 , H02J3/381 , H02M1/123 , H02J2300/26
摘要： A parallel inverter system for solar tracker systems minimizes circulating currents, mitigates ripple, and increases efficiency. The parallel inverter system includes inverters coupled together in parallel, a common DC bus coupled between a DC load and inputs of the inverters, a common AC bus coupled between outputs of the inverters and an electrical power grid, and a common-mode filter coupled to the output of each of the inverters. The parallel inverter system also includes controllers coupled to the inverters, respectively, the controllers configured to generate interleaved pulse width modulation (PWM) signals, respectively. The PWM signals are synchronized with each other. The PWM signals may be synchronized with each other via the EtherCAT protocol.
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公开(公告)号：US20240235465A1
公开(公告)日：2024-07-11
申请号：US18613310
申请日：2024-03-22
申请人： Nextracker LLC
摘要： A solar tracker including at least one pair of piers configured to be secured in the ground and defining a span between the pair, a bearing supported on the pier, and a torque tube supported in the bearing such that the bearing enables rotation of the torque tube, the torque tube including a double wall thickness area, wherein the double wall thickness area limits deflection of the torque tube along the span.
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公开(公告)号：US20240152169A1
公开(公告)日：2024-05-09
申请号：US18409086
申请日：2024-01-10
申请人： Nextracker LLC
发明人： Yang LIU , Alexander W. AU , Fei GU
CPC分类号： G05F1/67 , H02J3/381 , H02J7/35 , H02J2207/20 , H02J2300/26
摘要： Solar power systems and methods utilize DC power transmission and centralized power inversion. The solar power systems include a photovoltaic (PV) bus system and a fixed bus system. The PV system utilizes a control mode handoff control method, which includes determining that a local maximum power point tracking (MPPT) control is enabled; in response to determining that the local MPPT control is enabled, starting an MPPT mode timer; performing local MPPT; determining that the MPPT mode timer is greater than a predetermined period; and, in response to determining that the MPPT mode timer is greater than a predetermined period, handing off MPPT control to the next MPPT controller. The distributed MPPT control method may include sequential MPPT control, adaptive ΔV MPPT control, and/or power limiting control. The fixed bus system includes PV string-level MPPT controllers and a fixed DC input central inverter or multiple fixed DC modular inverters.
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公开(公告)号：US20230216300A1
公开(公告)日：2023-07-06
申请号：US18074054
申请日：2022-12-02
申请人： Nextracker LLC
发明人： Yang Liu , Alexander W. AU , Sandeep Sanjiva Lele
CPC分类号： H02J3/14 , H02J13/00034
摘要： A common enclosure includes a housing, inverter input connectors and an inverter output connector coupled to the housing, a common DC bus mechanically coupled to the housing and electrically coupled to the inverter input connectors, a common AC bus mechanically coupled to the housing and electrically coupled between the inverter output connector and a power grid connector, a controller mechanically coupled to the housing and electrically coupled to the common DC and AC buses, local controllers coupled to the inverters, decentralized controllers coupled to the local controllers, and a centralized controller in communication with the local controllers. The decentralized controllers generate decentralized control signals for the local controllers based on measured voltages and currents of the electrical power grid and the inverters. The centralized controller transmits centralized control signals to the local controllers to maintain a constant voltage on the common DC bus based on a predicted DC load.
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公开(公告)号：US20230137644A1
公开(公告)日：2023-05-04
申请号：US18087310
申请日：2022-12-22
申请人： Nextracker LLC
发明人： Alexander W. AU
IPC分类号： H01L31/042 , F24S25/632 , F24S25/615 , H02S30/00 , H02S20/30
摘要： A solar module configured in a frame assembly with multi-configuration attachment member(s), which has locking and unlocking characteristics.
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公开(公告)号：US20220310859A1
公开(公告)日：2022-09-29
申请号：US17840336
申请日：2022-06-14
申请人： Nextracker LLC
发明人： Alexander W. AU
IPC分类号： H01L31/052 , F24S25/10 , F24S25/70 , F24S30/425 , H02S20/32
摘要： In an example, the present invention provides a solar tracker apparatus. In an example, the apparatus comprises a center of mass with an adjustable hanger assembly configured with a clam shell clamp assembly on the adjustable hanger assembly and a cylindrical torque tube comprising a plurality of torque tubes configured together in a continuous length from a first end to a second end such that the center of mass is aligned with a center of rotation of the cylindrical torque tubes to reduce a load of a drive motor operably coupled to the cylindrical torque tube. Further details of the present example, among others, can be found throughout the present specification and more particularly below.
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公开(公告)号：US20240348199A1
公开(公告)日：2024-10-17
申请号：US18752249
申请日：2024-06-24
申请人： Nextracker LLC
发明人： Chen Li , Yang Liu , Alexander W. AU
摘要： 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：US20240283393A1
公开(公告)日：2024-08-22
申请号：US18651948
申请日：2024-05-01
申请人： Nextracker LLC
摘要： A solar tracker bearing and a solar tracker incorporating the bearing, the bearing including at least one rotatable part, the rotatable part including a notch for receiving a torque tube, a slot, formed in the rotatable part and extending below the notch, the slot defining an arc having multiple radii, at least one engagement member configured to be received in the slot, and at least one base configured to secure the engagement member in the slot and to secure the bearing to a pier.
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公开(公告)号：US20230308046A1
公开(公告)日：2023-09-28
申请号：US18196313
申请日：2023-05-11
申请人： Nextracker LLC
发明人： Alexander W. AU
CPC分类号： H02S20/32 , H02S20/30 , F16B5/06 , F16B5/0621 , F16B5/0635 , F16B5/0607 , F16B5/0664 , Y02E10/50 , F24S25/634
摘要： In an example, a clamp assembly for a glass on glass solar module for a tracker is included. The assembly has a lower clamp structure characterized by a top-hat shaped rail structure having a length extending from a first end to a second end. In an example, the assembly has an upper clamp structure configured to sandwich a pair of edges of a pair of solar modules with a portion of the lower clamp structure. In an example, the assembly has a locking spacer configured to the pair of edges of the pair of solar modules. In an example, the pair of edges comprises substantially glass material. In an example, the assembly has a pair of key structures configured with the locking spacer. Each of the key structures is affixed to each of the solar modules to physically lock each of the solar modules to the upper clamp structure.
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