US 12,278,516 B2
Control circuit for relay in uninterruptible power supply and control method and control device for the same
Zhichao Zhang, Guangdong (CN); Wei Xu, Guangdong (CN); Ping Gong, Guangdong (CN); Fan Tan, Guangdong (CN); and Weihao Peng, Guangdong (CN)
Assigned to Vertiv Corporation, Westerville, OH (US)
Filed by Vertiv Corporation, Westerville, OH (US)
Filed on Jun. 12, 2023, as Appl. No. 18/333,243.
Claims priority of application No. 202211565648.4 (CN), filed on Dec. 7, 2022.
Prior Publication US 2024/0195209 A1, Jun. 13, 2024
Int. Cl. H02J 9/06 (2006.01); H02J 7/00 (2006.01); H02J 7/34 (2006.01)
CPC H02J 9/06 (2013.01) [H02J 7/0031 (2013.01); H02J 7/345 (2013.01); H02J 2207/20 (2020.01)] 9 Claims
OG exemplary drawing
 
1. A control circuit for a relay in an uninterruptible power supply, comprising:
a plurality of capacitors comprising at least a first capacitor; and
a plurality of relays comprising at least a first relay, a second relay, a third relay and a fourth relay,
wherein a first terminal of the first relay is connected to a positive electrode of a battery, a second terminal of the first relay is connected to a first terminal of the first capacitor, a first terminal of the second relay is connected to a negative electrode of the battery, a second terminal of the second relay is connected to a second terminal of the first capacitor, a second terminal of the third relay is connected to the second terminal of the first relay, and a second terminal of the fourth relay is connected to the second terminal of the second relay,
wherein the control circuit further comprises a charging and discharging device formed by a plurality of inductors and a plurality of switching devices,
wherein the plurality of inductors comprise at least a first inductor and a second inductor, a first terminal of the first inductor is connected to the first terminal of the first capacitor, and a first terminal of the second inductor is connected to the second terminal of the first capacitor, and
wherein the plurality of switching devices comprise at least a first switching device, a second switching device and a third switching device, wherein a first terminal of the first switching device is connected to a positive electrode of a bus capacitor, a second terminal of the first switching device is connected to a first terminal of the second switching device, a first terminal of the second switching device is connected to a second terminal of the first inductor, a second terminal of the second switching device is connected to a second terminal of the second inductor, a first terminal of the third switching device is connected to the second terminal of the second switching device, and a second terminal of the third switching device is connected to a negative electrode of the bus capacitor, wherein the plurality of capacitors further comprise the bus capacitor.