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公开(公告)号：US09997917B2
公开(公告)日：2018-06-12
申请号：US14789448
申请日：2015-07-01
Applicant: Google LLC
Inventor： Sangsun Kim , Anand Ramesh , Scott Aldous , John Zipfel
CPC classification number: H02J3/32 , H02J3/38 , H02J3/382 , H02J3/383 , H02J2009/063 , H02M5/4585 , H02M7/48 , H02M2001/123
Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for non-isolated power conversion. In one aspect, a method includes generating first and second rectified outputs using a rectifier with a first input and a second input connected respectively to a first and second output of a power source, capacitively coupling the first and second rectified outputs to a neutral, generating first and second AC outputs from the first and second rectified outputs, and capacitively coupling the first and second AC outputs to the neutral. Other embodiments of this aspect include corresponding systems, apparatus, and computer programs, configured to perform the actions of the methods, encoded on computer storage devices.
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公开(公告)号：US20240339863A1
公开(公告)日：2024-10-10
申请号：US18743943
申请日：2024-06-14
Applicant: Google LLC
Inventor： Sangsun Kim , Krishnanjan Gubba Ravikumar
CPC classification number: H02J9/062 , G01R19/02 , H02J3/0012
Abstract: Disclosed are devices, systems, and methods for operating a backup power source or an uninterruptible power supply (UPS) that can be used in data centers and that provide a backup power source to power the data center when utility power is compromised. A power delivery system that provides power to a primary system may include a UPS with a state timing control system that operates a bypass static switch. The state timing control system can determine when to transition the primary system from the utility power supply to the backup UPS, based on the current AC voltage conditions. The state timing control system may perform modeling to emulate the intermediate DC voltage of an actual rectifier, and particularly emulate the holdup capacitor voltage. The emulated capacitor voltage can be obtained in real time by both an input power model based on RMS utility voltage and the actual rectifier output load.
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公开(公告)号：US12081064B2
公开(公告)日：2024-09-03
申请号：US17987081
申请日：2022-11-15
Applicant: Google LLC
Inventor： Sangsun Kim , Krishnanjan Gubba Ravikumar
CPC classification number: H02J9/062 , H02J3/0012 , H02J3/32 , H02J3/381 , H02J3/388 , H02J2300/20
Abstract: A system and method for power pooling, the system including a shared power line, a plurality of backup power supplies connected to the shared power line through respective transformers and one or more controllers configured to, for each respective backup power supply, after passage of a different respective predetermined amount of time, determine whether a transformer connected to the backup power supply is energized. In response to the transformer being energized, the controllers synchronize the backup power supply with the transformer and then set a switch positioned between the backup power supply and the transformer to a fully closed state. In response to the transformer not being energized, the controllers transition the switch from a fully open state to the fully closed state according to an inrush current limiting scheme.
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公开(公告)号：US20240195212A1
公开(公告)日：2024-06-13
申请号：US18078573
申请日：2022-12-09
Applicant: Google LLC
Inventor： Sangsun Kim , Krishnanjan Gubba Ravikumar
CPC classification number: H02J9/062 , G01R19/02 , H02J3/0012
Abstract: Disclosed are devices, systems, and methods for operating a backup power source or an uninterruptible power supply (UPS) that can be used in data centers and that provide a backup power source to power the data center when utility power is compromised. A power delivery system that provides power to a primary system may include a UPS with a state timing control system that operates a bypass static switch. The state timing control system can determine when to transition the primary system from the utility power supply to the backup UPS, based on the current AC voltage conditions. The state timing control system may perform modeling to emulate the intermediate DC voltage of an actual rectifier, and particularly emulate the holdup capacitor voltage. The emulated capacitor voltage can be obtained in real time by both an input power model based on RMS utility voltage and the actual rectifier output load.
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公开(公告)号：US10439399B2
公开(公告)日：2019-10-08
申请号：US15968502
申请日：2018-05-01
Applicant: Google LLC
Inventor： Sangsun Kim , Anand Ramesh , Scott Aldous , John Zipfel
Abstract: A power system including a rectifier and an inverter. The rectifier has a plurality of phase input terminals and a plurality of rectifier output terminals that provide respective rectified outputs, rectifier circuitry that rectifies the signals on the phase input terminals to generate respective rectified outputs on the rectifier output terminals, a rectifier neutral to receive a power source neutral, and capacitors connected between the rectifier neutral and the rectifier output terminals. The inverter includes a respective plurality of inverter input terminals respectively connected to the rectifier output terminals, a plurality of inverter output terminals, and an inverter neutral. The rectifier neutral and the inverter neutral are coupled by a conductor to form a same neutral.
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Patent Agency Ranking
公开(公告)号：US10327354B1
公开(公告)日：2019-06-18
申请号：US16290520
申请日：2019-03-01
Applicant: Google LLC
Inventor： Sangsun Kim , Honggang Sheng , Ken Krieger
Abstract: A server rack with vertically stacked shelves is disclosed. The shelves are used for housing loads (e.g. servers) and power supply units. Thus, both the power supply units and the servers are vertically stacked in the rack. An array of vertical and horizontal busses is secured to the back side of the server rack to electrically couple the servers with the power supply units. The arrangement of the PSUs and the busses provides for uniform current density across the server rack. The devices placed on the shelves are accessible and serviceable from the front of the server rack. The server rack can be placed within or secured to a device, system or a server room in a vertical orientation, a horizontal orientation or at an angle.
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公开(公告)号：US20180248377A1
公开(公告)日：2018-08-30
申请号：US15968502
申请日：2018-05-01
Applicant: Google LLC
Inventor： Sangsun Kim , Anand Ramesh , Scott Aldous , John Zipfel
CPC classification number: H02J3/32 , H02J3/38 , H02J3/382 , H02J3/383 , H02J2009/063 , H02M5/4585 , H02M7/48 , H02M2001/123
Abstract: A power system including a rectifier and an inverter. The rectifier has a plurality of phase input terminals and a plurality of rectifier output terminals that provide respective rectified outputs, rectifier circuity that rectifies the signals on the phase input terminals to generate respective rectified outputs on the rectifier output terminals, a rectifier neutral to receive a power source neutral, and capacitors connected between the rectifier neutral and the rectifier output terminals. The inverter includes a respective plurality of inverter input terminals respectively connected to the rectifier output terminals, a plurality of inverter output terminals, and an inverter neutral. The rectifier neutral and the inverter neutral are coupled by a conductor to form a same neutral.
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公开(公告)号：US09967998B1
公开(公告)日：2018-05-08
申请号：US15179390
申请日：2016-06-10
Applicant: Google LLC
Inventor： Sangsun Kim , Honggang Sheng , Ken Krieger
CPC classification number: H05K7/1492
Abstract: A server rack with vertically stacked shelves is disclosed. The shelves are used for housing loads (e.g. servers) and power supply units. Thus, both the power supply units and the servers are vertically stacked in the rack. An array of vertical and horizontal busses is secured to the back side of the server rack to electrically couple the servers with the power supply units. The arrangement of the PSUs and the busses provides for uniform current density across the server rack. The devices placed on the shelves are accessible and serviceable from the front of the server rack. The server rack can be placed within or secured to a device, system or a server room in a vertical orientation, a horizontal orientation or at an angle.
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公开(公告)号：US09966761B1
公开(公告)日：2018-05-08
申请号：US14285978
申请日：2014-05-23
Applicant: Google LLC
Inventor： Sangsun Kim , Anand Ramesh , Ronald Scott Collyer , Jyoti Sastry , Arunava Majumdar
CPC classification number: H02J3/14 , G01R19/0084 , G06Q50/06 , H02J4/00 , H02J2003/007 , Y02B70/3225 , Y04S20/222
Abstract: In general, one innovative aspect of the subject matter described in this specification can be embodied in a load control system configured to perform load control operations comprising: measuring a voltage on an electrical grid at a plurality of times; determining, for each time of the plurality of times, a difference between a specified normal voltage and the respective measured voltage at that time; summing the differences between the specified normal voltage and the measured voltages to determine a curtailment level; determining whether the curtailment level exceeds a first threshold curtailment level; and in response to determining that the curtailment level exceeds the first threshold curtailment level, adjusting an amount of power drawn by a load.
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公开(公告)号：US20240162742A1
公开(公告)日：2024-05-16
申请号：US17987081
申请日：2022-11-15
Applicant: Google LLC
Inventor： Sangsun Kim , Krishnanjan Gubba Ravikumar
CPC classification number: H02J9/062 , H02J3/0012 , H02J3/32 , H02J3/381 , H02J3/388 , H02J2300/20
Abstract: A system and method for power pooling, the system including a shared power line, a plurality of backup power supplies connected to the shared power line through respective transformers and one or more controllers configured to, for each respective backup power supply, after passage of a different respective predetermined amount of time, determine whether a transformer connected to the backup power supply is energized. In response to the transformer being energized, the controllers synchronize the backup power supply with the transformer and then set a switch positioned between the backup power supply and the transformer to a fully closed state. In response to the transformer not being energized, the controllers transition the switch from a fully open state to the fully closed state according to an inrush current limiting scheme.
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