公开(公告)号：US12244214B2

公开(公告)日：2025-03-04

申请号：US17714841

申请日：2022-04-06

Applicant: DELTA ELECTRONICS, INC.

Inventor： Cheng-Te Li ,  Nian-Ci Chen ,  Chih-Yuan Chuang ,  Cheng-Hao Hsueh

IPC: H02M1/00 ,  H02M1/10 ,  H02M1/32 ,  H02M1/42 ,  H02M7/219 ,  H02M1/36

Abstract: An AC-DC conversion circuit provides a three-phase power source. The AC-DC conversion circuit includes a first inductor, a second inductor, a third inductor, a switch bridge arm assembly, and a control unit. The switch bridge arm assembly includes three switch bridge arms, and each switch bridge arm includes an upper switch and a lower switch. A plurality of common-connected nodes between the upper switches and the lower switches are coupled to the three-phase power source through the first inductor, the second inductor, and the third inductor. The control unit turns on the upper switch and the lower switch to provide a current detection loop. The control unit acquires a magnitude of a first current flowing through the first inductor and a magnitude of a third current flowing through the third inductor, and determines whether a current detection mechanism of the first current and the third current is normal.