公开(公告)号：US20180097442A1

公开(公告)日：2018-04-05

申请号：US15599450

申请日：2017-05-18

Applicant: DELTA ELECTRONICS, INC.

Inventor： Hsin-Chung NIU ,  Chih-Hong WU ,  Chia-Hao CHANG ,  Ming-Hsiang LO

IPC: H02M1/42 ,  G05F1/70 ,  G05F5/00

CPC classification number: H02M1/4266 ,  G05F1/70 ,  G05F5/00 ,  H02M1/32 ,  H02M1/36 ,  H02M1/4225 ,  H02M2001/0006 ,  H02M2001/0032 ,  H02M2001/0083 ,  Y02B70/126 ,  Y02P80/112

Abstract: A power supply device includes a PF correction circuit, a power switching circuit and a control circuit. The PF correction circuit converts an input voltage to a bus voltage according to a control signal to supply a later stage circuit. The power switching circuit selectively switches to conduct a first source or a second source to the PF correction circuit to provide the input voltage to the PF correction circuit. The control circuit outputs the control signal to the PF correction circuit. When the control circuit detects a first voltage of the first source connecting to the PF correction circuit is abnormal, the control circuit determines whether a second voltage of the second source is smaller than the bus voltage and controls the power switching circuit to switch when the second voltage is smaller than the bus voltage to conduct the second source to the PF correction circuit.

公开(公告)号：US20210336474A1

公开(公告)日：2021-10-28

申请号：US16988233

申请日：2020-08-07

Applicant: DELTA ELECTRONICS, INC.

Inventor： Te-Chih PENG ,  Ming-Hsiang LO ,  Chih-Hong WU ,  Yu-Ren WENG

IPC: H02J9/06

Abstract: A power backup circuit provides a plurality of input power sources to back up a load. The power backup circuit includes a first switch, a second switch, and a control unit. The input power sources at least includes a first input power source and a second input power source. If the input power source of the load needs to be changed from the first input power source to the second input power source, the control unit controls the first switch to be coupled to the second input power source and controls the second switch to be coupled to the second input power source after the control unit effects a supply current flowing through a first power supply path and a second power supply path both coupled to the first input power source and the load to be reduced below a current threshold.

公开(公告)号：US20210320519A1

公开(公告)日：2021-10-14

申请号：US17147100

申请日：2021-01-12

Applicant: DELTA ELECTRONICS, INC.

Inventor： Shih-Chang CHUANG ,  Te-Chih PENG ,  Ming-Hsiang LO ,  Chih-Hong WU ,  Min-Cheng CHIANG

IPC: H02J9/06 ,  H01M10/44 ,  H02J7/00 ,  G05F1/56 ,  G06F1/30

Abstract: A power supply system includes a plurality of power supply units and a plurality of battery units. Each power supply unit is coupled to a common bus through a first switch. Each battery unit is corresponding to each power supply unit, and is coupled to the common bus through a second switch. Any one of the power supply units turns on the corresponding first switch and turns on the second switches of other battery units so that the power supply unit acquires power electricity from other battery units through the common bus.