US 12,407,247 B2
Resonant alternating current/direct current converter, electronic device, and adapter
Xiao Zhang, Xi'an (CN); Luyu Wang, Shenzhen (CN); Wenbo Sun, Nuremberg (DE); Qingzu Hong, Shenzhen (CN); and Grover Victor Torrico-Bascopé, Kista (SE)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on Jul. 21, 2023, as Appl. No. 18/356,425.
Application 18/356,425 is a continuation of application No. PCT/CN2021/073045, filed on Jan. 21, 2021.
Prior Publication US 2023/0369968 A1, Nov. 16, 2023
Int. Cl. H02M 3/00 (2006.01); H02M 1/32 (2007.01); H02M 7/217 (2006.01)
CPC H02M 3/01 (2021.05) [H02M 1/32 (2013.01); H02M 7/217 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A resonant AC/DC converter, comprising:
a half bridge rectifier circuit, a clamping surge protection circuit, and a resonant DC/DC conversion circuit, wherein
an input end of the half bridge rectifier circuit is configured to be connected to an alternating current power supply to convert an alternating current of the alternating current power supply into a pulsating direct current;
the clamping surge protection circuit is connected to the half bridge rectifier circuit in parallel, and the clamping surge protection circuit is connected to a resonant capacitor in the resonant DC/DC conversion circuit in parallel; the resonant capacitor is connected to a bus capacitor in parallel; and the clamping surge protection circuit comprises at least a unilateral conduction component;
the clamping surge protection circuit is configured to clamp a voltage of the alternating current power supply when the voltage of the alternating current power supply is greater than a voltage of the bus capacitor, so that energy of the alternating current power supply is released to the bus capacitor; and clamp a voltage of the resonant capacitor in the resonant DC/DC conversion circuit when the voltage of the alternating current power supply is less than or equal to the voltage of the bus capacitor; and
the resonant DC/DC conversion circuit is configured to perform electric energy conversion on the pulsating direct current that is output by the half bridge rectifier circuit, and then perform output.