公开(公告)号：US20240364203A1

公开(公告)日：2024-10-31

申请号：US18232721

申请日：2023-08-10

Applicant: Delta Electronics, Inc.

Inventor： Hsin-Chih Chen ,  Li-Hung Wang ,  Chao-Li Kao ,  Yi-Ping Hsieh ,  Hung-Chieh Lin

IPC: H02M1/00 ,  H02M7/483

CPC classification number: H02M1/0029 ,  H02M1/007 ,  H02M7/4837

Abstract: A power converter is provided. The power converter includes first to fourth switches electrically connected in series, a flying capacitor and a controller. Positive and negative terminals of the flying capacitor are electrically connected to the second and third switches respectively. The controller operates the first and fourth switches to perform a first complementary switching with a first dead time, and operates the second and third switches to perform a second complementary switching with a second dead time. The controller determines to regulate the first or second dead time by detecting a capacitor voltage of the flying capacitor, such that the capacitor voltage of the flying capacitor is maintained within a balance voltage range.

公开(公告)号：US20250007389A1

公开(公告)日：2025-01-02

申请号：US18243626

申请日：2023-09-07

Applicant: Delta Electronics, Inc.

Inventor： Hsin-Chih Chen ,  Li-Hung Wang ,  Chao-Li Kao ,  Yi-Ping Hsieh ,  Hung-Chieh Lin

IPC: H02M1/32

Abstract: A circulating current suppression method of a power system having a plurality of power modules is provided. Each power module includes a high-voltage bus, a low-voltage bus and a balance circuit having a neutral voltage. The circulating current suppression method includes: in each balance circuit, disposing a first capacitor electrically coupled between the high-voltage bus and the neutral voltage, and disposing a second capacitor electrically coupled between the neutral voltage and the low-voltage bus; acquiring a current effective value of an input of each power module; if detecting that the current effective value of at least one power module doesn't remain at a current reference value, determining that a circulating current occurs in the at least one power module; and operating the balance circuit of the at least one power module to charge the first capacitor or the second capacitor to regulate the neutral voltage for suppressing the circulating current.