US 12,334,775 B2
Power supply system and control method
Maoping Jia, Xi'an (CN); and Mingming Pu, Xi'an (CN)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on Apr. 26, 2023, as Appl. No. 18/307,706.
Application 18/307,706 is a continuation of application No. PCT/CN2020/124243, filed on Oct. 28, 2020.
Prior Publication US 2023/0261512 A1, Aug. 17, 2023
Int. Cl. H02J 9/06 (2006.01)
CPC H02J 9/068 (2020.01) 17 Claims
OG exemplary drawing
 
1. A power supply system, comprising:
an active power contactor connected in series in a path of a main power supply circuit;
a standby power contactor connected in series in a path of a standby power supply circuit, wherein the active power contactor and the standby power contactor are interlocked through an auxiliary power contactor, and the auxiliary power contactor is connected in series to a control switch; and
a controller configured to: when the main power supply circuit is abnormal, control the control switch to change a status of the auxiliary power contactor, to switch to the standby power supply circuit; and when the standby power supply circuit is abnormal, control the control switch to change the status of the auxiliary power contactor, to switch to the main power supply circuit;
wherein the auxiliary power contactor comprises a normally open contact and a normally closed contact;
the normally open contact of the auxiliary power contactor and a normally closed contact of the standby power contactor are connected in series, and the normally open contact of the auxiliary power contactor and a coil of the active power contactor are connected in series; and the normally closed contact of the auxiliary power contactor and a normally closed contact of the active power contactor are connected in series, and the normally closed contact of the auxiliary power contactor and a coil of the standby power contactor are connected in series;
the control switch is a normally closed switch;
a coil of the auxiliary power contactor is connected in series to the control switch; and
the controller is further configured to: when the main power supply circuit is abnormal, control the control switch to be turned off, so that the coil of the auxiliary power contactor is powered off, and switch to the standby power supply circuit; or when the standby power supply circuit is abnormal, control the control switch to be turned on, so that the coil of the auxiliary power contactor is powered on, and switch to the main power supply circuit.