Patent ID: 9531288
Filing Date: 2016-12-27
CPC Classification: H02J,H02M

Claim Text:
1. An uninterruptible power supply (UPS) comprising: an input configured to (i) receive first power from a utility source to power at least one load, and (ii) receive second power from the utility source, wherein the at least one load is separate from the UPS; an inverter configured to receive (i) when in a first mode, the first power and the second power, and (ii) when in a second mode, the second power and not the first power, wherein the second power is used to power the inverter; a bypass circuit connected to the input and configured to bypass the inverter to supply the first power to an output of the UPS when operating in the second mode; and a control module configured to (i) detect a variable voltage at the output of the UPS a first plurality of times to provide a first plurality of voltages, (ii) Integrate the first plurality of voltages to generate a first sum, and (iii) subsequent to completing a transition from the second mode to the first mode, adjust an output voltage of the inverter based on the first sum to balance the variable voltage of the UPS, wherein the variable voltage of the UPS is provided based on the output voltage of the inverter.