公开(公告)号：US20240405670A1

公开(公告)日：2024-12-05

申请号：US18203299

申请日：2023-05-30

Applicant: STMicroelectronics International N.V.

Inventor： Yannick HAGUE ,  Romain LAUNOIS ,  Guillaume THIENNOT

IPC: H02M1/42 ,  H02M1/00 ,  H02M1/08

Abstract: A bidirectional PFC system includes a high-frequency branch with a first transistor connected between an IO node and a high-frequency tap, and a second transistor connected between the high-frequency tap and a reference node, and a low-frequency branch with a first thyristor connected between the IO node and a low-frequency tap, and a second thyristor connected between the low-frequency tap and the reference node. An inductor is connected between the first node and the high-frequency tap. A first capacitor is connected between the first node and the low-frequency tap. The first node and the low-frequency tap are coupled to input terminals. A control circuit generates first and second gate drive signals for the transistors so as to modify an AC signal at the input terminals such that the AC current falls below a holding current of the second thyristor prior to zero crossing of the AC voltage.

公开(公告)号：US20240333175A1

公开(公告)日：2024-10-03

申请号：US18614887

申请日：2024-03-25

Applicant: STMicroelectronics International N.V.

Inventor： Yannick HAGUE ,  Guillaume THIENNOT ,  Romain LAUNOIS

IPC: H02M7/53846 ,  H02M7/5383

CPC classification number: H02M7/538463 ,  H02M7/538466 ,  H02M7/53835

Abstract: A converter circuit is configured to convert a DC voltage into an AC voltage using a first thyristor and second thyristor in series in a first branch, a third thyristor and fourth thyristor in series in a second branch in an antiparallel configuration to the first branch, and a first transistor and second transistor in series in a third branch. When the AC voltage is equal to zero, and when the first thyristor is conductive and the first and second transistors are non-conductive, a first positive current is applied to the gate of the antiparallel third thyristor to control turn on and ensure that the current circulating in the first thyristor falls below the holding current.