UPS FOR MIXED AC AND DC LOADS

摘要

According to one aspect, embodiments of the invention provide a UPS comprising an input to receive input AC power, a bus configured to receive backup DC power, a first output configured to provide an output AC voltage derived from at least one of the input AC power and the backup DC power, a second output configured to provide an output DC voltage derived from at least one of the input AC power and the backup DC power, a first inverter coupled between the bus and a first transformer, the first transformer coupled to the input, a second inverter coupled between the bus and a second transformer, the second transformer coupled to the first output, and a controller configured to operate the second inverter to maintain the output AC voltage above a first threshold value and to operate the first inverter to maintain the output DC voltage above a second threshold.

主权项

1. An Uninterruptible Power Supply (UPS) comprising:
an input configured to be coupled to an AC source and to receive input AC power from the AC source; a DC bus configured to be coupled to a DC source and to receive backup DC power from the DC source; a first output configured to be coupled to at least one AC load and to provide output AC power having an output AC voltage to the at least one AC load derived from at least one of the input AC power and the backup DC power; a second output configured to be coupled to at least one DC load and to provide output DC power having an output DC voltage to the at least one DC load derived from at least one of the input AC power and the backup DC power; a first inverter coupled between the DC bus and a first transformer, the first transformer coupled to the input; a second inverter coupled between the DC bus and a second transformer, the second transformer coupled to the first output; and a controller configured to operate the second inverter to maintain the output AC voltage above a first threshold value and to operate the first inverter to maintain the output DC voltage above a second threshold.