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公开(公告)号：US11916614B2
公开(公告)日：2024-02-27
申请号：US17171785
申请日：2021-02-09
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Douglas Paul Arduini , Sung Kee Baek , Richard Anthony O'Brien , Joel Richard Goergen , Chad M. Jones , Jason DeWayne Potterf , Ruqi Li
CPC classification number: H04B3/54 , G01R31/083 , G01R31/50 , G05B9/02 , G06F1/305 , H02J13/00 , H02J13/00032 , H04L12/10 , H04L12/40045
Abstract: In one embodiment, a method includes identifying at a first powered device in communication with power sourcing equipment, a second powered device in communication with the first powered device, wherein the first powered device is receiving high voltage pulse power from the power sourcing equipment, notifying the power sourcing equipment of the second powered device at the first powered device, and performing a low voltage power initialization at the first powered device with the second powered device before passing the high voltage pulse power to the second powered device.
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公开(公告)号：US20220116238A1
公开(公告)日：2022-04-14
申请号：US17560424
申请日：2021-12-23
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Richard Anthony O'Brien , Douglas Paul Arduini , Sung Kee Baek , Ruqi Li , Joel Richard Goergen
IPC: H04L12/10 , G01R31/08 , H04L41/0677
Abstract: In one embodiment, an apparatus comprises an input power interface for receiving input power, a power control system for transmitting DC (Direct Current) pulse power on multiple phases over a cable to a plurality of powered devices and verifying cable operation during an off-time of pulses in the DC pulse power, and a cable interface for delivery of the DC pulse power on the multiple phases and data over the cable to the powered devices. A method for transmitting multiple phase pulse power is also disclosed herein.
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公开(公告)号：US09780669B2
公开(公告)日：2017-10-03
申请号：US14987789
申请日：2016-01-05
Applicant: Cisco Technology, Inc.
Inventor： Yang li , Kan Seto , Michael Grant , Matt Howard , Ruqi Li
IPC: H02M3/335
CPC classification number: H02M3/33507 , H02M1/36 , H02M3/158 , H02M3/33592 , H02M3/337 , H02M2001/008 , Y02B70/1475
Abstract: In one embodiment, a power apparatus includes a buck converter including a first capacitor, a first inductor and a first switch for connection with a direct current power supply, wherein when the first switch is closed and the buck converter is connected to the direct current power supply, the first capacitor and the first inductor are connected in series to the direct current power supply, a full-bridge inverter including at least four switches including the first switch, a second, third and fourth switch so that the first switch is shared by the inventor and buck converter, the inverter being operative to convert direct current to alternating current by alternating (a) closing the first and fourth switch with the second and third switch open, and (b) closing the second and third switch with the first and fourth switch open, and a transformer to step down an output of the inverter.
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公开(公告)号：US11777394B1
公开(公告)日：2023-10-03
申请号：US17724985
申请日：2022-04-20
Applicant: Cisco Technology, Inc.
Inventor： Xiqun Zhu , Sung Kee Baek , Joel Goergen , Doug Paul Arduini , Ruqi Li
IPC: H02M1/00
CPC classification number: H02M1/0048 , H02M1/0043
Abstract: A control method improves the efficiency profile of a power supply across a wide range of output loading. The method includes obtaining a measure of output power for a power supply, which includes one or more output modules and an auxiliary power supply. The method determines whether a maximum power rating of the auxiliary power supply is sufficient to provide the measure of output power. Responsive to a determination that the maximum power rating of the auxiliary power supply is sufficient to provide the measure of output power, the controller of the power supply directs the auxiliary power supply to provide the output power.
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公开(公告)号：US20230223988A1
公开(公告)日：2023-07-13
申请号：US18187006
申请日：2023-03-21
Applicant: Cisco Technology, Inc.
Inventor： Douglas Paul Arduini , Ruqi Li , Chad M. Jones , Sung Kee Baek , Jason DeWayne Potterf , Joel Richard Goergen
IPC: G06F1/30
CPC classification number: G06F1/305
Abstract: Techniques are provided for detecting a fault across a pair of lines. Pulse power is applied across the pair of lines. The pulse power comprises alternating pulse on-time intervals and pulse off-time intervals. During a pulse off-time interval, a resistor is connected across the pair of lines and then disconnected when a voltage across the pair of lines reaches a first droop percentage in a first period of time. After disconnecting the resistor, it is determined whether the voltage across the pair of lines droops at least a second droop percentage within a second period of time that begins after the first period of time. Occurrence of a line-to-line fault across the pair of lines is determined when the voltage across the pair of lines droops by at least the second droop percentage or more within the second period of time.
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Patent Agency Ranking
公开(公告)号：US11522442B1
公开(公告)日：2022-12-06
申请号：US17444089
申请日：2021-07-30
Applicant: Cisco Technology, Inc.
Inventor： Ruqi Li , Sung K. Baek , Douglas P. Arduini , Xiqun Zhu
Abstract: Embodiments herein describe control circuitry for operating a PFC converter in an AC-DC power supply under light loading conditions. The embodiments herein improve the power factor by identifying an optimized phase offset (γ) between an AC reference voltage and an AC reference current used to control the PFC converter. In one embodiment, the control circuitry iteratively changes the phase offset between the reference voltage and current and measures its impact on the power factor. The control circuitry then selects the phase offset that results in the best power factor to use when operating the PFC converter under light loading conditions.
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公开(公告)号：US20240380432A1
公开(公告)日：2024-11-14
申请号：US18780995
申请日：2024-07-23
Applicant: Cisco Technology, Inc.
Inventor： Douglas Paul Arduini , Ruqi Li , Chad M. Jones , Sung Kee Baek , Jason DeWayne Potterf , Joel Richard Goergen
Abstract: Techniques are provided for detecting a fault across a pair of lines. Pulse power is applied across the pair of lines. The pulse power comprises alternating pulse on-time intervals and pulse off-time intervals. During a pulse off-time interval, a resistor is connected across the pair of lines and then disconnected when a voltage across the pair of lines reaches a first droop percentage in a first period of time. After disconnecting the resistor, it is determined whether the voltage across the pair of lines droops at least a second droop percentage within a second period of time that begins after the first period of time. Occurrence of a line-to-line fault across the pair of lines is determined when the voltage across the pair of lines droops by at least the second droop percentage or more within the second period of time.
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公开(公告)号：US20240364383A1
公开(公告)日：2024-10-31
申请号：US18769534
申请日：2024-07-11
Applicant: Cisco Technology, Inc.
Inventor： Douglas Paul Arduini , Sung Kee Baek , Richard Anthony O'Brien , Joel Richard Goergen , Chad M. Jones , Jason DeWayne Potterf , Ruqi Li
CPC classification number: H04B3/54 , G01R31/083 , G01R31/50 , G05B9/02 , G06F1/305 , H02J13/00 , H02J13/00032 , H04L12/10 , H04L12/40045
Abstract: In one embodiment, a method includes receiving low voltage pulse power from power sourcing equipment at a powered device, synchronizing the powered device with a waveform of the low voltage pulse power received from the power sourcing equipment, and operating the powered device with high voltage pulse power received from the power sourcing equipment.
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公开(公告)号：US20230344329A1
公开(公告)日：2023-10-26
申请号：US17724985
申请日：2022-04-20
Applicant: Cisco Technology, Inc.
Inventor： Xiqun Zhu , Sung Kee Baek , Joel Goergen , Doug Paul Arduini , Ruqi Li
IPC: H02M1/00
CPC classification number: H02M1/0048 , H02M1/0043
Abstract: A control method improves the efficiency profile of a power supply across a wide range of output loading. The method includes obtaining a measure of output power for a power supply, which includes one or more output modules and an auxiliary power supply. The method determines whether a maximum power rating of the auxiliary power supply is sufficient to provide the measure of output power. Responsive to a determination that the maximum power rating of the auxiliary power supply is sufficient to provide the measure of output power, the controller of the power supply directs the auxiliary power supply to provide the output power.
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公开(公告)号：US20230308134A1
公开(公告)日：2023-09-28
申请号：US18186301
申请日：2023-03-20
Applicant: Cisco Technology, Inc.
Inventor： Douglas Paul Arduini , Sung Kee Baek , Richard Anthony O'Brien , Joel Richard Goergen , Chad M. Jones , Jason DeWayne Potterf , Ruqi Li
CPC classification number: H04B3/54 , H02J13/00032 , G01R31/50 , G01R31/083 , G05B9/02 , G06F1/305 , H02J13/00 , H04L12/10 , H04L12/40045
Abstract: In one embodiment, a method includes receiving low voltage pulse power from power sourcing equipment at a powered device, synchronizing the powered device with a waveform of the low voltage pulse power received from the power sourcing equipment, and operating the powered device with high voltage pulse power received from the power sourcing equipment.
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