Ac power supply apparatus and methods providing variable voltage waveforms for load transient conditions
AssigneeEaton Corporation
InventorRobert William Johnson, JR.
Life of this patent
Estimating the term…
Abstract
Some embodiments of the inventive subject matter provide methods of operating an uninterruptible power supply (UPS) configured to provide power to a load from first and second power sources, e.g., from a utility source and a battery or other backup source. The methods include operating the UPS to momentarily provide an altered voltage waveform in coordination with a transition of the load between first and second power sources. For example, the altered voltage waveform may provide a momentarily increased voltage rate of change to compensate for a transient current demand presented by the load.
Claims26
A method of operating an uninterruptible power supply (UPS) configured to provide power to a load from first and second power sources, the method comprising:
- operating the UPS to momentarily provide an altered voltage waveform in coordination with a transition of the load between first and second power sources.
An apparatus comprising:
- an AC power supply circuit configured to provide a nominal steady-state AC output voltage waveform to a load and further configured to momentarily provide an increased voltage rate of change in comparison to the nominal steady-state AC output voltage waveform in responding to an outage at the load.
A method of operating an AC power supply circuit configured to be coupled to a load, the method comprising:
- responsive to an outage at the load, operating the AC power supply circuit to momentarily provide a first voltage waveform that compensates for an initial current demand of the load;
- and then
- operating the AC power supply circuit to provide power to the load using a second voltage waveform.
Dependencies are inferred from the claim text.