Patent ID: 11955838
Assignee: EATON INTELLIGENT POWER LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 1:
2. A system comprising:
a DC bus;
an auxiliary power source coupled to the DC bus;
an energy storage device;
a modular first uninterruptible power supply (UPS) comprising:
a first uninterruptible power module (UPM) coupled to the DC bus and configured to provide power to an AC load from the auxiliary power source, wherein an AC port of the first UPM is coupled to a first input of an automatic transfer switch (ATS), wherein an AC power source is coupled to a second input of the ATS, and wherein the ATS is configured to selectively provide power from the first UPM and the AC power source to a load connected to an output of the ATS; and
a second UPM coupled to the DC bus and the energy storage device and configured to transfer energy between the DC bus and the energy storage device to regulate a voltage on the DC bus; and

a second UPS, wherein an output of the ATS is connected to a first AC port of the second UPS and wherein a second port of the second UPS is connected to the AC load and to an AC port of the second UPM of the first UPS.