Patent ID: 11942818
Assignee: SCHNEIDER ELECTRIC IT CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An uninterruptible power supply (UPS) system comprising:
at least one energy-storage-device connection configured to be coupled to an energy-storage device;
a first output connection configured to be coupled to a main power source providing main power;
a second output connection configured to be coupled to at least one load;
a first power converter coupled to the at least one energy-storage-device connection;
a second power converter coupled to the at least one energy-storage-device connection;
at least one switch coupled to the first power converter and the second power converter; and
at least one controller coupled to the first power converter and the second power converter, the at least one controller being configured to
control the at least one switch to connect the first power converter and the second power converter to the first output connection and the second output connection,
control the at least one switch to disconnect the first power converter from the second output connection responsive to detecting a fault in the main power,
control, responsive to detecting the fault in the main power, the first power converter to provide power to the first output connection during an interim period, wherein the interim period lasts for a predetermined amount of time beginning when the fault in the main power is detected,
control the at least one switch to disconnect the second power converter from the first output connection responsive to detecting the fault in the main power,
determine whether the fault in the main power has ended within the predetermined amount of time, and
control, after the interim period and responsive to determining that the fault in the main power has not ended within the predetermined amount of time, the first power converter to provide power to the second output connection in parallel with the second power converter.