公开(公告)号：US20240380624A1

公开(公告)日：2024-11-14

申请号：US18782069

申请日：2024-07-24

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 ,  G06F1/26 ,  H04L12/40 ,  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.

公开(公告)号：US11990952B2

公开(公告)日：2024-05-21

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

IPC: H04B3/54 ,  G01R31/08 ,  G01R31/50 ,  G05B9/02 ,  G06F1/30 ,  H02J13/00 ,  H04L12/10 ,  H04L12/40

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.

公开(公告)号：US20230361668A1

公开(公告)日：2023-11-09

申请号：US18353536

申请日：2023-07-17

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.

公开(公告)号：US11456883B2

公开(公告)日：2022-09-27

申请号：US16380954

申请日：2019-04-10

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Richard Anthony O'Brien ,  Douglas Paul Arduini ,  Sung Kee Baek ,  Ruqi Li ,  Joel Richard Goergen

IPC: G01R31/50 ,  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.

公开(公告)号：US11063630B2

公开(公告)日：2021-07-13

申请号：US16671508

申请日：2019-11-01

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

IPC: H04B3/54 ,  H04L12/10 ,  H02J13/00 ,  G01R31/08 ,  G05B9/02 ,  G01R31/50 ,  G06F1/30

Abstract: In one embodiment, a method includes transmitting from power sourcing equipment, low voltage pulse power to a powered device in a communications network, performing a safety test, enabling high voltage pulse power operation at the power sourcing equipment upon passing the safety test, and transmitting high voltage pulse power from the power sourcing equipment to the powered device. The powered device synchronizes with a waveform of the low voltage pulse power.

公开(公告)号：US20210167813A1

公开(公告)日：2021-06-03

申请号：US17171723

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

IPC: H04B3/54 ,  G01R31/08 ,  H04L12/10 ,  G05B9/02 ,  H02J13/00 ,  G06F1/30 ,  G01R31/50

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.

公开(公告)号：US12126456B2

公开(公告)日：2024-10-22

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 ,  G06F1/26 ,  H04L12/40 ,  H04L41/0677

CPC classification number: H04L12/10 ,  G01R31/085 ,  H04L41/0677 ,  G06F1/26 ,  G06F1/263 ,  G06F1/266 ,  H04L12/40045

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.

公开(公告)号：US12126399B2

公开(公告)日：2024-10-22

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: H04B3/54 ,  G01R31/08 ,  G01R31/50 ,  G05B9/02 ,  G06F1/30 ,  H02J13/00 ,  H04L12/10 ,  H04L12/40

CPC classification number: H04B3/54 ,  G01R31/083 ,  G01R31/50 ,  G05B9/02 ,  G06F1/305 ,  H02J13/00 ,  H02J13/00032 ,  H04L12/10 ,  H04L12/40045

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.

公开(公告)号：US12113588B2

公开(公告)日：2024-10-08

申请号：US17171723

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

IPC: H04B3/54 ,  G01R31/08 ,  G01R31/50 ,  G05B9/02 ,  G06F1/30 ,  H02J13/00 ,  H04L12/10 ,  H04L12/40

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.

公开(公告)号：US20240168533A1

公开(公告)日：2024-05-23

申请号：US17993323

申请日：2022-11-23

Applicant: Cisco Technology, Inc.

Inventor： Douglas Paul Arduini ,  Sung Kee Baek ,  Ruqi Li ,  Joel Richard Goergen ,  Chad M. Jones ,  Jason DeWayne Potterf

IPC: G06F1/30 ,  G06F1/3206 ,  G06F1/3296

CPC classification number: G06F1/30 ,  G06F1/3206 ,  G06F1/3296

Abstract: Techniques are provided to synchronize a remote power switch at a power receiver end of a power cable with a first power switch operation at a power source end of the cable, without any physical or data communication means for synchronization. This process may involve synchronization of a MOSFET-type switch with voltage pulsing at the power source cable end to a MOSFET-type isolation switch at the power receiver cable end to provide (voltage or load) power during the On-time and safety testing for a shock hazard during the Off-time. This method synchronizes switching pulses by sensing and synchronizing on the cable switching voltage transients from the source side. This method also involves blanking the additional switching voltage transients on the cable generated after the synchronized switching begins to maintain proper synchronization. These techniques may be used for a single-pair pulse power cable or with multi-pair multi-phase pulse power cables.