公开(公告)号：US20170163163A1

公开(公告)日：2017-06-08

申请号：US14962997

申请日：2015-12-08

Applicant: Delta Electronics, Inc.

Inventor： Yungtaek JANG ,  Milan M. Jovanovic

IPC: H02M3/335

CPC classification number: H02M3/1582 ,  H02M2001/0058 ,  Y02B70/1491

Abstract: A bidirectional buck-boost converter includes at least one soft-switching cell to reduce switching losses by providing soft-switching of all semiconductor devices. A soft-switching cell comprises an active switch coupled in series with an inductor, a two-winding transformer, and a reset-voltage circuit. The soft-switching cells enable the buck and boost rectifiers to turn off with a controlled turn-off rate of their current to minimize their reverse-recovery losses, the power-controlling buck and boost switch to turn on with zero-voltage switching (ZVS), and the switch of the soft-switching cell to turn off with zero-current switching (ZCS).

公开(公告)号：US20210359594A1

公开(公告)日：2021-11-18

申请号：US17209073

申请日：2021-03-22

Applicant: Delta Electronics, Inc.

Inventor： Chi ZHANG ,  Zhiyu SHEN ,  Yungtaek JANG ,  Sheng-Hua LI ,  Ruxi WANG ,  Peter Mantovanelli BARBOSA

IPC: H02M1/42 ,  H02M7/217 ,  H02M1/12 ,  H02M7/219

Abstract: The present disclosure provides a three-phase AC/DC converter aiming for low input current harmonic. The converter includes an input stage for receiving a three-phase AC input voltage, an output stage for at least one load, and one or more switching conversion stages, each stage including a plurality of half bridge modules. The switches in each module operate with a substantially fixed 50% duty cycle and are connected in a specific pattern to couple a DC-link and a neutral node of the input voltage. The AC/DC converter further includes one or more controllers adapted to vary the switching frequency of the switches in the switching conversion stages based on at least one of load voltage, load current, input voltage, and DC-link voltage. The converter can also include one or more decoupling stages, such as, inductive components adapted to decouple the output stage from the switching conversion stages.

公开(公告)号：US20230188032A1

公开(公告)日：2023-06-15

申请号：US18163960

申请日：2023-02-03

Applicant: Delta Electronics, Inc.

Inventor： Chi ZHANG ,  Zhiyu SHEN ,  Yungtaek JANG ,  Sheng-Hua LI ,  Ruxi WANG ,  Peter Mantovanelli BARBOSA

IPC: H02M1/42 ,  H02M1/12 ,  H02M7/217 ,  H02M7/219

CPC classification number: H02M1/4216 ,  H02M1/12 ,  H02M7/2173 ,  H02M7/219 ,  H02M7/2195 ,  H02M7/23

Abstract: The present disclosure provides a three-phase AC/DC converter aiming for low input current harmonic. The converter includes an input stage for receiving a three-phase AC input voltage, an output stage for at least one load, and one or more switching conversion stages, each stage including a plurality of half bridge modules. The switches in each module operate with a substantially fixed 50% duty cycle and are connected in a specific pattern to couple a DC-link and a neutral node of the input voltage. The AC/DC converter further includes one or more controllers adapted to vary the switching frequency of the switches in the switching conversion stages based on at least one of load voltage, load current, input voltage, and DC-link voltage. The converter can also include one or more decoupling stages, such as, inductive components adapted to decouple the output stage from the switching conversion stages.