公开(公告)号：US20230387814A1

公开(公告)日：2023-11-30

申请号：US18448298

申请日：2023-08-11

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Luyu WANG ,  Xiao ZHANG ,  Shuyu OU ,  Wenbo SUN ,  Grover Victor TORRICO-BASCOPÉ

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

CPC classification number: H02M3/33573 ,  H02M1/0058 ,  H02M1/088 ,  H02M3/01

Abstract: A direct power AC/DC conversion apparatus employs a dual branch topology. A first branch includes a first AHB switching network configured to receive an AC grid power and produce an AC power, coupled through a series resonant impedance to a first primary winding of a transformer. The first switching network includes two bi-directional switches coupled in series where each bi-directional switch includes two switching devices coupled in series in opposite polarity. A secondary winding of the transformer is coupled through an SR switching device to an output DC power. A second branch includes a diode bridge, configured to receive the AC grid power and produce a DC power, coupled to a second AHB switching network. The second AHB switching network is coupled through a second series resonant impedance to a second primary winding of the transformer. Each of the first and second branches are operated alternately and independently.

公开(公告)号：US20230369968A1

公开(公告)日：2023-11-16

申请号：US18356425

申请日：2023-07-21

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Xiao ZHANG ,  Luyu WANG ,  Wenbo SUN ,  Qingzu HONG ,  Grover Victor TORRICO-BASCOPÉ

IPC: H02M3/00 ,  H02M7/217 ,  H02M1/32

CPC classification number: H02M3/01 ,  H02M7/217 ,  H02M1/32

Abstract: A resonant AC/DC converter. An input end of a half bridge rectifier circuit is connected to an alternating current power supply. A clamping surge protection circuit is connected to the half bridge rectifier circuit in parallel, and is connected to a resonant capacitor in a resonant DC/DC conversion circuit in parallel. When a voltage of the alternating current power supply is greater than a voltage of a bus capacitor, the clamping surge protection circuit is configured to prevent a surge signal entering the resonant DC/DC conversion circuit. When the voltage of the alternating current power supply is less than or equal to a voltage of a direct current bus, a voltage of the resonant capacitor is clamped. The resonant DC/DC conversion circuit performs electric energy conversion on the pulsating direct current that is output by the half bridge rectifier circuit, and then performs output.