公开(公告)号：US20220263402A1

公开(公告)日：2022-08-18

申请号：US17659178

申请日：2022-04-14

Applicant: Delta Electronics (Shanghai) Co., Ltd.

Inventor： Kai DONG ,  Lin WANG ,  Shuailin DU ,  Junhao JI ,  Hui HUANG

IPC: H02M1/12 ,  H02M7/06 ,  H02M1/08 ,  H02M7/5387

Abstract: The present disclosure provides a control method for an AC-DC conversion circuit. The method includes: in an entire load range, acquiring circuit parameter information of the AC-DC conversion circuit; limiting an actual switching frequency or an actual switching period of the AC-DC conversion circuit within a preset working range according to the circuit parameter information. The AC-DC conversion circuit can meet requirements of Total Harmonic Distortion (THD), Power Factor (PF), efficiency and Electromagnetic Interference (EMI) and the like by adjusting the working information of the AC-DC conversion circuit through the preset working range.

公开(公告)号：US20230021124A1

公开(公告)日：2023-01-19

申请号：US17810642

申请日：2022-07-05

Applicant: Delta Electronics (Shanghai) Co.,Ltd.

Inventor： Kai DONG ,  Yichao WANG ,  Shuailin DU ,  Jinfa ZHANG

IPC: H02M1/00 ,  H02M1/32 ,  H02M7/483

Abstract: A multilevel conversion circuit having a flying capacitor is provided, including: a first bridge arm; a second bridge arm including a flying capacitor, the midpoints of the second and first bridge arms connected to a series branch defined by a first current limiting circuit, a power supply and an inductor; a DC bus capacitor connected in parallel to the first and second bridge arms; a rectifier circuit having an input end coupled to the power supply and an output end connected to a first auxiliary power supply; and a controller coupled to the first auxiliary power supply and the plurality of switches of the second bridge arm to control corresponding switches of the second bridge arm, the power supply charges the flying capacitor through the corresponding switches of the first and second bridge arms and the first current limiting circuit.

公开(公告)号：US20230261567A1

公开(公告)日：2023-08-17

申请号：US18163900

申请日：2023-02-03

Applicant: Delta Electronics (Shanghai) CO., LTD

Inventor： Kunpeng WANG ,  Mingjuan ZHANG ,  Shuailin DU ,  Kai DONG

IPC: H02M3/00 ,  H02M1/42 ,  H02M1/44

CPC classification number: H02M3/003 ,  H02M1/42 ,  H02M1/44 ,  H02M3/01

Abstract: A high-density power supply includes a shell, a fan, a PFC module, a DC-DC module and a main board. The shell has a first air passage and a second air passage arranged side by side. The fan is arranged on an inner side or an outer side of the shell. The PFC module includes a PFC inductor arranged in the first air passage, and the PFC inductor faces directly to the fan. The DC-DC module is arranged in the first air passage. The DC-DC module includes at least one DC-DC conversion circuit, each of the DC-DC conversion circuits includes a first PCB and a transformer magnetic core, a transformer winding and power components arranged on the first PCB. The main board is arranged within the shell. The PFC inductor and the at least one DC-DC conversion circuit are electrically connected with the main board, respectively.

公开(公告)号：US20210305907A1

公开(公告)日：2021-09-30

申请号：US17199472

申请日：2021-03-12

Applicant: Delta Electronics (Shanghai) Co., Ltd.

Inventor： Kai DONG ,  Lin WANG ,  Shuailin DU ,  Junhao JI ,  Hui HUANG

IPC: H02M7/06 ,  H02M1/08

Abstract: The present disclosure provides a control method for an AC-DC conversion circuit. The method comprises: calculating working information of an AC-DC conversion circuit according to at least one circuit parameter information of an input voltage, an input current, an output voltage, and an output current of the AC-DC conversion circuit; comparing the working information of the AC-DC conversion circuit with a preset working range to obtain an actual switching frequency or an actual switching period of the AC-DC conversion circuit. The AC-DC conversion circuit can meet requirements of THD, PF, efficiency and EMI and the like by adjusting the working information of the AC-DC conversion circuit through the preset working range.

公开(公告)号：US20230020108A1

公开(公告)日：2023-01-19

申请号：US17810639

申请日：2022-07-04

Applicant: Delta Electronics (Shanghai) Co.,Ltd.

Inventor： Yichao WANG ,  Kai DONG ,  Shuailin DU ,  Jinfa ZHANG

IPC: H02M7/483 ,  H02M1/00 ,  H02M1/42

Abstract: Multilevel conversion circuit having a flying capacitor and method for precharging the same are provided. The multilevel conversion circuit includes: a first bridge arm including a plurality of switches connected in series; a second bridge arm including a plurality of switches connected in series and a flying capacitor group, midpoints of the two bridge arms connected to a power supply and an inductor to form a series branch; a DC bus capacitor to which the two bridge arms are connected in parallel; a first voltage clamping module connected between a first end of the flying capacitor group and a first end of the DC bus capacitor; and a second voltage clamping module connected between a second end of the flying capacitor group and a second end of the DC bus capacitor.