公开(公告)号：US20220278625A1

公开(公告)日：2022-09-01

申请号：US17636676

申请日：2020-06-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shogo HIROTA ,  Kenji HANAMURA ,  Takashi SHIRAKAWA

IPC: H02M3/335 ,  H02M1/00 ,  H02M1/088

Abstract: For power transfer from a first DC part to a second DC part in a dual active bridge (DAB) converter by stepping down a voltage, a first bridge circuit includes a period in which the first DC part and a primary winding of an insulated transformer conduct and a period in which ends of a primary winding of the insulated transformer are short-circuited in the first bridge circuit. A second bridge circuit includes a rectification period. A control circuit variably controls a phase difference between a first leg a the second leg, variably controls a simultaneous off period of a fifth switching element and a sixth switching element, and variably controls a simultaneous off period of a seventh switching element and an eighth switching element.

公开(公告)号：US20220360182A1

公开(公告)日：2022-11-10

申请号：US17636184

申请日：2020-06-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shogo HIROTA ,  Kenji HANAMURA ,  Takashi SHIRAKAWA

IPC: H02M3/335 ,  H02M1/08

Abstract: For power transfer from a first DC part to a second DC part in a dual active bridge (DAB) converter by stepping up a voltage, the second bridge circuit 12 includes a period in which a secondary winding n2 of an insulated transformer TR1 and the second DC part conduct and a period in which ends of the secondary winding n2 of the insulated transformer TR1 are short-circuited in the second bridge circuit 12. A control circuit 13 fixes a phase difference between a first leg a the second leg, variably controls a simultaneous off period of a fifth switching element S5 and a sixth switching element S6, and variably controls a simultaneous off period of a seventh switching element S7 and an eighth switching element S8.