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公开(公告)号：US09712040B1
公开(公告)日：2017-07-18
申请号：US14586059
申请日：2014-12-30
Applicant: Google Inc.
Inventor： Sangsun Kim , Srinivasa Murthy Salapaka , Murti V. Salapaka , Subhrajit Roychowdhury
Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for shaping grid currents output from parallel inverters in a power distribution system with virtual impedances. In one aspect, a method includes receiving a measurement of the current output from the inverter, processing the measurement of the current to extract a first current component having a particular frequency, obtaining a second current component based on the measurement of the current and the extracted first current component, weighing the first and second current components with respective first and second impedances to obtain respective first and second component voltages, the first impedance having a lower impedance amplitude than the second impedance, obtaining a shaped voltage based on the first and second component voltages, and outputting a control signal to the inverter, the control signal causing the inverter to output the shaped voltage to the power distribution bus.
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公开(公告)号：US20170047744A1
公开(公告)日：2017-02-16
申请号：US14856748
申请日：2015-09-17
Applicant: Google Inc.
Inventor： Sangsun Kim , Francisco Javier Elias , Cornelius Bendict O'Sullivan
CPC classification number: H02J5/00 , H02M1/36 , H02M1/42 , H02M1/4216 , H02M1/4225 , H02M3/1584 , H02M7/217 , H02M2003/1586 , Y02B70/126
Abstract: A method for converting alternating current (AC) power to direct current (DC) power in a non-isolated power converter includes receiving a three-phase power supply, transforming the three phase power supply into six voltage phases, half-wave rectifying the AC current, applying a power factor correction to achieve DC power, and outputting a DC power signal. The three-phase power supply has an AC current. The six voltage phase is transformed at a secondary side of a three-phase distribution transformer, which includes a center tap located at the secondary side of the three-phase distribution transformer and one or more AC wire conductors. The AC wire conductors carry the transformed power supply. The half-wave rectification occurs at the secondary side of the three-phase distribution transformer. An arrangement of rectifier diodes on the AC wire conductors accomplishes the half-wave rectification. The output DC power signal has an output voltage at a DC output.
Abstract translation: 在非隔离功率转换器中将交流（AC）功率转换成直流（DC）功率的方法包括接收三相电源，将三相电源变换为六个电压相位，对AC进行半波整流 电流，施加功率因数校正以实现直流电力，并输出直流电力信号。 三相电源具有交流电流。 六相电压相位在三相配电变压器的二次侧变换，该三相配电变压器包括位于三相配电变压器的二次侧的中心抽头和一个或多个交流电线导体。 交流导线承载变压电源。 半波整流发生在三相配电变压器的二次侧。 AC导线导体上的整流二极管的布置完成半波整流。 输出直流电源信号的输出电压为直流输出。
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公开(公告)号：US20170005471A1
公开(公告)日：2017-01-05
申请号：US14789448
申请日：2015-07-01
Applicant: Google Inc.
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.
Abstract translation: 方法，系统和装置，包括在计算机存储介质上编码的用于非隔离电力转换的计算机程序。 一方面，一种方法包括使用具有第一输入和第二输入的整流器产生第一和第二整流输出，第一输入和第二输入分别连接到电源的第一和第二输出端，将第一和第二整流输出电容耦合到空档，产生 来自第一和第二整流输出的第一和第二AC输出，以及将第一和第二AC输出电容耦合到空档。 该方面的其他实施例包括被配置为执行编码在计算机存储设备上的方法的动作的相应的系统，装置和计算机程序。
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公开(公告)号：US09439327B1
公开(公告)日：2016-09-06
申请号：US14600480
申请日：2015-01-20
Applicant: Google Inc.
Inventor： Honggang Sheng , Sangsun Kim
IPC: H05K7/20
CPC classification number: H05K7/20572 , H05K7/207 , H05K7/20836
Abstract: Systems and methods are provided for cooling electronic equipment in a data center. Ambient air is vertically circulated from a workspace across a plurality of rack-mounted electronic devices. The electronic devices are located in a plurality of trays such that each tray has a major plane that is substantially parallel to a side plane of the rack. The circulated air is cooled with a heat exchanger that is connected to a vertical end of the rack via a sealed interface. Multiple racks can be arrayed in a distributed cooling arrangement, which increases reliability and scalability of the data center.
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公开(公告)号：US09716408B2
公开(公告)日：2017-07-25
申请号：US14808917
申请日：2015-07-24
Applicant: Google Inc.
Inventor： Sangsun Kim , Anand Ramesh
CPC classification number: H02J9/061 , H02J1/10 , H02J7/0031 , H02J7/0068 , H02J7/0077
Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for controlling a battery power source. In one aspect, a system includes a first MOSFET having a first gate, a first source, and a first drain. A second MOSFET having a second gate, a second source, and a second drain. The first source is connected to the second source, and the second drain is coupled to a ground. A control circuit connected to the first gate and the second gate and that provides control signals to the first gate and the second gate that cause the first and second MOSFETS to operate in saturation regions during a first operational state to cause the first power source to discharge and the first MOSFET operates in a linear region during a second operational state to limit a charging current that charges the first power source.
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Patent Agency Ranking
公开(公告)号：US09373977B1
公开(公告)日：2016-06-21
申请号：US14715014
申请日：2015-05-18
Applicant: Google Inc.
Inventor： Sangsun Kim , Pascal Kam
CPC classification number: H02J9/00 , H02J5/00 , H02J7/0021 , H02J7/0052 , H02J7/0063 , H02J7/0068 , H02J7/007 , H02J7/0081 , H02J7/02 , H02J9/061 , H02J2007/0059 , Y10T307/615
Abstract: Methods and systems supply uninterrupted power to a load using a backup battery module. A driver circuit connects the load and the backup battery module such that the operational range of the load voltage is narrower than the operational range of the battery voltage. Different charging and discharging paths of the driver circuit may be used to limit the DC bus voltage to values lower than the battery voltage. The proposed systems and methods can increase power efficiency and decrease the cost of power supply and conversion operations.
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公开(公告)号：US09843221B1
公开(公告)日：2017-12-12
申请号：US14933421
申请日：2015-11-05
Applicant: Google Inc.
Inventor： Sangsun Kim , William Leslie Dailey , Craig Kaneshiro , Shane R. Nay , Cornelius O'Sullivan
CPC classification number: H02J9/06 , H02J1/10 , H02J7/00 , H02J7/0042 , H02J7/0045 , H02J7/0068 , H02J9/00 , Y10T307/62 , Y10T307/625
Abstract: Aspects of the disclosure relate generally to uninterruptible power supply units for systems requiring back up power. Each unit may include UPS circuitry for controlling charging and allowing discharging of a battery. The UPS circuitry may includes a controller and a plurality of metal-oxide semiconductor field effect transistors (“MOSFET”) switches. The MOSFETs may include charging and discharging MOSFETs arranged in series with the battery all driven by a single gate driver, such as a controller. In this regard, the controller may limit the charging current though all of the MOSFETs and charge the battery. The MOSFETs may be arranged such that if the charging MOSFET fails, the redundant charging MOSFET may continue to limit the charging current to the battery. Similarly, a redundant discharging MOSFET may be arranged in series with a discharging MOSFET in order to continue to provide discharging current if the discharging MOSFET fails.
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公开(公告)号：US20170288454A1
公开(公告)日：2017-10-05
申请号：US15624321
申请日：2017-06-15
Applicant: Google Inc.
Inventor： Sangsun Kim , Anand Ramesh
Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for controlling a battery power source. In one aspect, a system includes a first MOSFET having a first gate, a first source, and a first drain. A second MOSFET having a second gate, a second source, and a second drain. The first source is connected to the second source, and the second drain is coupled to a ground. A control circuit connected to the first gate and the second gate and that provides control signals to the first gate and the second gate that cause the first and second MOSFETS to operate in saturation regions during a first operational state to cause the first power source to discharge and the first MOSFET operates in a linear region during a second operational state to limit a charging current that charges the first power source.
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公开(公告)号：US09413221B1
公开(公告)日：2016-08-09
申请号：US14096676
申请日：2013-12-04
Applicant: Google Inc.
Inventor： Sangsun Kim , Di Xu , Anand Ramesh
CPC classification number: H02M1/32 , H02M5/225 , H02M5/4585 , H02M7/217 , H02M7/23
Abstract: A power conversion unit includes power converters arranged sequentially to each other to convert input power that is provided at an input of the power conversion unit to output power. A set of first capacitors are arranged in series with each other and include, for each power converter, a first capacitor that is arranged in parallel with an associated power converter. Each first capacitor is also arranged to store a portion of the input power. A set of second capacitors are connected in series with each other and include a second capacitor connected between each pair of sequential power converters in the sequence. The set of second capacitors are arranged to balance the portion of the input power stored by each first capacitor.
Abstract translation: 电力转换单元包括彼此顺序布置的电力转换器，以将设置在电力转换单元的输入端的输入电力转换成输出电力。 一组第一电容器彼此串联布置，并且对于每个功率转换器包括与相关联的功率转换器并联布置的第一电容器。 每个第一电容器还被布置成存储输入功率的一部分。 一组第二电容器彼此串联连接，并且包括连续在每对顺序功率转换器之间的第二电容器。 该组第二电容器被布置成平衡由每个第一电容器存储的输入功率的部分。
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公开(公告)号：US10033196B2
公开(公告)日：2018-07-24
申请号：US14856748
申请日：2015-09-17
Applicant: Google Inc.
Inventor： Sangsun Kim , Francisco Javier Elias , Cornelius Bendict O'Sullivan
Abstract: A method for converting alternating current (AC) power to direct current (DC) power in a non-isolated power converter includes receiving a three-phase power supply, transforming the three phase power supply into six voltage phases, half-wave rectifying the AC current, applying a power factor correction to achieve DC power, and outputting a DC power signal. The three-phase power supply has an AC current. The six voltage phase is transformed at a secondary side of a three-phase distribution transformer, which includes a center tap located at the secondary side of the three-phase distribution transformer and one or more AC wire conductors. The AC wire conductors carry the transformed power supply. The half-wave rectification occurs at the secondary side of the three-phase distribution transformer. An arrangement of rectifier diodes on the AC wire conductors accomplishes the half-wave rectification. The output DC power signal has an output voltage at a DC output.
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