公开(公告)号：US20180188302A1

公开(公告)日：2018-07-05

申请号：US15737612

申请日：2015-06-26

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Daniel Humphrey ,  Michael Delany ,  Mohamed Amin Bernat

IPC: G01R23/02 ,  G01R19/00 ,  G01R19/04 ,  G01R19/165

CPC classification number: G01R23/02 ,  G01R19/0084 ,  G01R19/04 ,  G01R19/165 ,  G01R23/10

Abstract: Examples herein disclose a system comprising a comparator circuit and a controller. The comparator circuit generates a waveform of an input source. The controller measures a period of time associated with the waveform and determines an alternating current (AC) characteristic of the input source based on the measured period of time.

公开(公告)号：US11387646B2

公开(公告)日：2022-07-12

申请号：US16919371

申请日：2020-07-02

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Mohamed Amin Bernat ,  Kailash Kishore Mirpuri ,  Daniel Humphrey

IPC: H02H3/22 ,  H02H9/02 ,  H02H1/00 ,  H02H9/00 ,  H02H3/02 ,  H02H9/08 ,  H02H3/20 ,  H02H9/04

Abstract: Examples described herein relate to a power management system. The power management system may include an input power filter coupled between a common power bus having a first voltage level and a load. The input power filter may include a variable impedance circuit coupled to an input capacitor. Further, the power management system may include a bus voltage controller coupled to the input power filter to detect a transient event causing a surge in a load current drawn by the load and to alter an impedance of the variable impedance circuit to limit an input current flowing via the variable impedance circuit, thereby maintaining voltage on the common power bus within a predefined range from the first voltage level.