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公开(公告)号：US20220069613A1
公开(公告)日：2022-03-03
申请号：US17007978
申请日：2020-08-31
Applicant: Caterpillar Inc.
Inventor： Suresh Baddam Reddy , David Michael Milam
Abstract: An uninterruptible power supply (UPS) system or other power system includes a primary power source and a fuel cell and battery system as a backup power source. The fuel cell and battery backup system(s) are integrated into the primary power source to reduce the required power components and to provide high-quality power conditioning for the UPS system. A control system receives and analyzes data from the primary power source, as well as from the fuel cell and battery backup systems, to perform advanced power management and sharing, manage transitions, export power to the grid, and manage boil-off losses at the fuel cell.
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公开(公告)号：US12060877B2
公开(公告)日：2024-08-13
申请号：US17025716
申请日：2020-09-18
Applicant: Caterpillar Inc.
CPC classification number: F04B49/20 , F04B49/08 , F04B2201/1202 , F04B2201/1208 , F04B2203/0207 , F04B2205/05 , F04B2207/01
Abstract: A monitor and control system for a hydraulic fracturing pump is described herein to reduce or eliminate harmful oscillations in fluid discharge pressure caused by the pump load dynamics. The monitor and control system receives various sensor data from the operation of the pump, including the pump crank position, and executes a pump control equation or model based on the pump sensor data, pump load data and/or pump speed data. Pump control equations or models are specific to the design and dynamic operation of the pump, incorporating the number of plungers, pump dynamics, motor lag and motor dynamics, etc. Using the pump control equations or models, the monitor and control system determines control commands for the pump motor to reduce or eliminate the oscillatory discharge pressure at the pump.
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公开(公告)号：US20170353037A1
公开(公告)日：2017-12-07
申请号：US15174495
申请日：2016-06-06
Applicant: Caterpillar Inc.
Inventor： Suresh Baddam Reddy
CPC classification number: H02J3/46 , B64D2221/00 , H02J3/32 , H02J13/002 , H02K7/1815
Abstract: A variable speed genset system is provided. The variable speed genset system may include a plurality of gensets, a switch assembly coupling one or more of the gensets to a common bus, a power electronics circuit selectively coupling the switch assembly to the common bus, and a controller in electrical communication with the gensets, the switch assembly and the power electronics circuit. The controller may be configured to designate any one or more of the gensets to operate as variable speed gensets and one or more of the remaining gensets to operate as constant speed gensets, engage the switch assembly to couple the variable speed genset to the power electronics circuit, and engage the switch assembly to couple the constant speed gensets to the common bus.
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公开(公告)号：US11451085B2
公开(公告)日：2022-09-20
申请号：US17007978
申请日：2020-08-31
Applicant: Caterpillar Inc.
Inventor： Suresh Baddam Reddy , David Michael Milam
Abstract: An uninterruptible power supply (UPS) system or other power system includes a primary power source and a fuel cell and battery system as a backup power source. The fuel cell and battery backup system(s) are integrated into the primary power source to reduce the required power components and to provide high-quality power conditioning for the UPS system. A control system receives and analyzes data from the primary power source, as well as from the fuel cell and battery backup systems, to perform advanced power management and sharing, manage transitions, export power to the grid, and manage boil-off losses at the fuel cell.
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公开(公告)号：US20220018234A1
公开(公告)日：2022-01-20
申请号：US16931033
申请日：2020-07-16
Applicant: Caterpillar Inc.
Inventor： Suresh Baddam Reddy
Abstract: A system for driving a hydraulic fracturing pump includes an electric motor having a drive shaft configured to rotate at a constant speed and a power source electrically connected to the electric motor. The system also includes a motor controller operably connected to the electric motor via a relay, wherein the motor controller is operably connected to the electric motor by the relay to start the electric motor, and is operably disconnected from the electric motor by the relay once the drive shaft reaches the constant speed. The system further includes a pump coupled to the drive shaft via a transmission, wherein the transmission is configured to transfer rotational energy from the drive shaft to the pump via an output shaft of the transmission, the output shaft of the transmission being configured to drive the pump at varying speeds while the drive shaft rotates at the constant speed.
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Patent Agency Ranking
公开(公告)号：US11962156B2
公开(公告)日：2024-04-16
申请号：US17406687
申请日：2021-08-19
Applicant: Caterpillar Inc.
Inventor： Suresh Baddam Reddy , Dimple Raja Prathapaneni
IPC: H02J3/38 , G05B19/042 , H02J13/00
CPC classification number: H02J3/381 , G05B19/042 , H02J13/00002 , G05B2219/2639 , H02J2300/24 , H02J2310/12
Abstract: Systems and methods for operating a hybrid power system are disclosed. A controller may perform operations, including: obtaining load data for the hybrid power system; obtaining power availability data and energy cost data for each power asset in each power asset group of a plurality of power asset groups; and determining active power commands for each power asset by performing at least one optimization, such that the determined active power commands optimize a total operating cost, wherein: the at least one optimization is based on at least one cost function that accounts for asset degradation, asset maintenance cost, asset operation efficiency cost, and the energy cost data; and the at least one optimization is constrained by a plurality of constraints based on the load data, the power availability data, and characteristics of the power assets; and operating each power asset based on the determined active power commands.
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公开(公告)号：US11384629B2
公开(公告)日：2022-07-12
申请号：US16931033
申请日：2020-07-16
Applicant: Caterpillar Inc.
Inventor： Suresh Baddam Reddy
Abstract: A system for driving a hydraulic fracturing pump includes an electric motor having a drive shaft configured to rotate at a constant speed and a power source electrically connected to the electric motor. The system also includes a motor controller operably connected to the electric motor via a relay, wherein the motor controller is operably connected to the electric motor by the relay to start the electric motor, and is operably disconnected from the electric motor by the relay once the drive shaft reaches the constant speed. The system further includes a pump coupled to the drive shaft via a transmission, wherein the transmission is configured to transfer rotational energy from the drive shaft to the pump via an output shaft of the transmission, the output shaft of the transmission being configured to drive the pump at varying speeds while the drive shaft rotates at the constant speed.
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公开(公告)号：US20250042273A1
公开(公告)日：2025-02-06
申请号：US18228908
申请日：2023-08-01
Applicant: Caterpillar Inc.
Inventor： Dachuan Yu , Dustin Craig Selvey , Suresh Baddam Reddy
Abstract: A portable charging system for an off-road electric vehicle includes a line connection port; a first Alternating Current to Direct Current (AC-to-DC) converter circuit connected to the line connection port, wherein the first AC-to-DC converter circuit is a bidirectional AC-to-DC converter circuit; and a three-port triple active bridge (TAB) converter circuit including a DC line port coupled to the first AC-to-DC converter circuit, a DC charging port, and a DC energy storage port.
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公开(公告)号：US11936184B2
公开(公告)日：2024-03-19
申请号：US17406486
申请日：2021-08-19
Applicant: Caterpillar Inc.
Inventor： Suresh Baddam Reddy , Dimple Raja Prathapaneni
Abstract: Systems and methods for operating a hybrid power system are disclosed. A controller may perform operations, including: obtaining a load forecast; obtaining a power availability forecast and an energy cost forecast for each power asset group; performing at least one prospective optimization to determine scheduled active power commands for the groups that optimize a total operating cost; tracking an on-line load; tracking an on-line power availability and an on-line energy cost for the groups; performing at least one on-line optimization to determine on-line active power commands for the groups that (i) account for variance between the load forecast and the on-line load, (ii) account for variance between the power availability forecast and the on-line power availability, and (iii) optimize the total operating cost; and operating the groups based on the scheduled active power commands and the on-line active power commands.
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公开(公告)号：US11428704B2
公开(公告)日：2022-08-30
申请号：US16738097
申请日：2020-01-09
Applicant: Caterpillar Inc.
Inventor： Zhijun Cai , Yanchai Zhang , Wenming Zhao , Yong Sun , Xuefei Hu , Eric Wayne Ohlson , Suresh Baddam Reddy
Abstract: A system and method for protecting a genset from pole slip is disclosed. The system may comprise a generator, a prime mover and a controller. The generator includes a stator and a rotor. The prime mover is configured to drive rotation of the rotor. The controller may be configured to: determine mechanical status of the generator based on data associated with a translational displacement of the rotor; determine electrical status of the generator based on (a) a load angle or (b) the load angle and a rate of change of the load angle associated with rotation of the rotor in the stator; determine an operating condition of the generator based on fusion of the mechanical status and the electrical status; if the operating condition is a pole-slip-warning, activate an output member to display or emit a warning; and, if the operating condition is a pole-slip, activate a protective action.
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