公开(公告)号：US12218770B2

公开(公告)日：2025-02-04

申请号：US18486238

申请日：2023-10-13

Applicant: Cisco Technology, Inc.

Inventor： Chad M. Jones ,  Joel Richard Goergen ,  George Allan Zimmerman ,  Richard Anthony O'Brien ,  Douglas Paul Arduini ,  Jason DeWayne Potterf ,  Sung Kee Baek

IPC: H04L12/10 ,  H03M13/03 ,  H03M13/37 ,  H04B3/54 ,  H04L41/12 ,  H04W80/02 ,  H03M13/15

Abstract: In one embodiment, a method includes transmitting pulse power on two wire pairs, the pulse power comprising a plurality of high voltage pulses with the high voltage pulses on the wire pairs offset between the wire pairs to provide continuous power, performing low voltage fault detection on each of the wire pairs between the high voltage pulses, and transmitting data on at least one of the wire pairs during transmittal of the high voltage pulses. Data transmittal is suspended during the low voltage fault detection.

公开(公告)号：US11831109B2

公开(公告)日：2023-11-28

申请号：US17122165

申请日：2020-12-15

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Douglas Paul Arduini ,  Sung Kee Baek ,  Joel Richard Goergen

IPC: H02H1/00 ,  H02H1/04 ,  H02H3/22 ,  H02H9/06 ,  H01R13/66 ,  H01R13/713

CPC classification number: H01R13/6666 ,  H01R13/6683 ,  H01R13/713

Abstract: In one embodiment, and apparatus includes an electrical socket for connection with an electrical plug, a sensor for identifying a secure connection between the electrical socket and the electrical plug, and an electronic controller electrically coupled to the electrical socket and comprising a power input for receiving power. The electronic controller is operable to transmit power to the electrical socket upon receiving a signal from the sensor identifying the secure connection between the electrical socket and the electrical plug and shut off or turn on power to the electrical socket upon receiving an external input to the electronic controller. A method is also disclosed herein. The apparatus and method provide an electronic controlled power switch or circuit breaker safety device.

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.

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.

公开(公告)号：US11682904B2

公开(公告)日：2023-06-20

申请号：US17484847

申请日：2021-09-24

Applicant: Cisco Technology, Inc.

Inventor： Xiqun Zhu ,  Sung Kee Baek ,  Robert Gregory Twiss

IPC: H02J3/26 ,  G01R29/16

CPC classification number: H02J3/26 ,  G01R29/16

Abstract: A method comprises, at a power balancing circuit for three-phase AC power: feeding three power phases to respective loads; measuring power drain on the three power phases by the respective loads; based on measuring, detecting an unbalanced power drain across the three power phases due to a relatively light power drain on one or more lightly loaded power phases and a relatively high power drain on one or more heavily loaded power phases; computing an amount of power to be drained from the one or more lightly loaded power phases and to be fed to the one or more heavily loaded power phases to balance the power drain across the three power phases; and transferring the amount of power from the one or more lightly loaded power phases to the one or more heavily loaded power phases to balance the power drain across the three power phases.

公开(公告)号：US20220385334A1

公开(公告)日：2022-12-01

申请号：US17884124

申请日：2022-08-09

Applicant: Cisco Technology, Inc.

Inventor： Chad M. Jones ,  Joel Richard Goergen ,  George Allan Zimmerman ,  Richard Anthony O'Brien ,  Douglas Paul Arduini ,  Jason DeWayne Potterf ,  Sung Kee Baek

IPC: H04B3/54 ,  H04L12/10 ,  H03M13/37

Abstract: In one embodiment, a method includes transmitting pulse power on two wire pairs, the pulse power comprising a plurality of high voltage pulses with the high voltage pulses on the wire pairs offset between the wire pairs to provide continuous power, performing low voltage fault detection on each of the wire pairs between the high voltage pulses, and transmitting data on at least one of the wire pairs during transmittal of the high voltage pulses. Data transmittal is suspended during the low voltage fault detection.

公开(公告)号：US11342762B2

公开(公告)日：2022-05-24

申请号：US17097611

申请日：2020-11-13

Applicant: Cisco Technology, Inc.

Inventor： Xiqun Zhu ,  Sung Kee Baek ,  Wingo Cheong ,  Steven Anthony Granzella ,  Joel Goergen ,  Charles Calvin Byers

IPC: H02J7/00

Abstract: In one embodiment, a battery backup unit (BBU) cut-off and recharge circuit includes: a first transistor, a power entry connection connected to a main power supply, where power from the power entry connection flows to application circuits for an electronic device, and the first transistor is positioned between a BBU and the power entry connection, and a microcontroller, where the microcontroller is operative to: detect a loss of power from the main power supply, turn on the first transistor to enable the BBU to discharge through the power entry connection to application circuits, detect a status of charge (SOC) for the BBU, and upon detecting that the SOC is under a predefined threshold, set the BBU cut-off and recharge circuit to a lockdown state by turning off the first transistor.

公开(公告)号：US20220094194A1

公开(公告)日：2022-03-24

申请号：US17537895

申请日：2021-11-30

Applicant: Cisco Technology, Inc.

Inventor： Douglas Paul Arduini ,  Sung Kee Baek ,  Jonathan Lee Smith ,  Joel Richard Goergen

IPC: H02J9/00 ,  H02J4/00

Abstract: In one embodiment, an apparatus includes a power supply operable to output power to a load along with at least one other power supply, a sensing component for identifying a load level, and a control component for switching the power supply from a full power mode to a power saving mode based on the identified load level. The power supply shares current with the other power supply at a lower current and generally the same voltage as the other power supply while in the power saving mode.

公开(公告)号：US20210408822A1

公开(公告)日：2021-12-30

申请号：US17109007

申请日：2020-12-01

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Douglas Paul Arduini ,  Sung Kee Baek ,  Jonathan Lee Smith ,  Joel Richard Goergen

IPC: H02J9/00 ,  H02J4/00

Abstract: In one embodiment, an apparatus includes a power supply operable to output power to a load along with at least one other power supply, a sensing component for identifying a load level, and a control component for switching the power supply from a full power mode to a power saving mode based on the identified load level. The power supply shares current with the other power supply at a lower current and generally the same voltage as the other power supply while in the power saving mode.

公开(公告)号：US10971923B2

公开(公告)日：2021-04-06

申请号：US16113655

申请日：2018-08-27

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Xiqun Zhu ,  Sung Kee Baek

IPC: H02H9/00 ,  H02H9/02

Abstract: In one embodiment, a hot swap inrush current limiter circuit includes a pair of paths connecting an input and a load, a first capacitor connected in series with a switch between the paths, a first resistor connected to one of the paths and to a junction between the switch and the first capacitor, a second capacitor connected in series with a second resistor between the paths, with a gate of the switch connected to a junction between the second capacitor and the second resistor, a first diode connected in parallel with the second capacitor, and a second diode connected in parallel with the second resistor to allow for discharge of the second capacitor when input power is off. A method is also disclosed herein.