ACTIVE DROOP CURRENT SHARING AMONG POWER SUPPLY UNITS

摘要

Active droop current sharing among power supply units may regulate output currents of power supply units supplying shared current to a common load. The regulation may employ a combination of droop control and active current control. The shared current may be regulated such that each power supply unit provides a substantially equal share of the total current supplied. A current difference between two power supplies may be regulated to be within a desired maximum threshold for current difference.

主权项

1. A method for active droop current sharing, the method comprising:
responsive to switching a load to a first power supply and to switching the load to a second power supply, activating droop control of a first current supplied by the first power supply and a second current supplied by the second power supply; detecting that the first current is stable within a tolerance over a time period and that the second current is stable within the tolerance over the time period; and responsive to detecting that the first current and the second current are stable and that a current difference between the first current and the second current is greater than a first maximum threshold, regulating the first current and the second current using active current control to reduce the current difference to correspond to the first maximum threshold.