公开(公告)号：US10855104B2

公开(公告)日：2020-12-01

申请号：US15920488

申请日：2018-03-14

Applicant: Cisco Technology, Inc.

Inventor： Dean Nguyen ,  Matt Howard ,  Michael Grant

IPC: H02J9/06 ,  H02J1/02 ,  H02J1/10

Abstract: In one embodiment, a power apparatus, includes at least one first and second power supply to receive power from a main power supply, the at least one first power supply including at least one first input capacitor to smooth voltage ripples, a voltage monitor to monitor voltage provided by the main power supply, and cause enablement and/or disablement of at least one part of the at least one first power supply according to the voltage provided by the main power supply, and at least one first blocking and passing component configured to selectively channel energy from the main power supply to charge the at least one first input capacitor during a time when the at least one part is enabled, and channel energy from the at least one first input capacitor to the at least one second power supply during a time when the at least one part is disabled.

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.