AC power supply apparatus and methods providing variable voltage waveforms for load transient conditions

摘要

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.

主权项

1. 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:
transitioning a voltage provided at the output of the UPS from a first voltage waveform to a second voltage waveform in coordination with a transition of the load between the first and second power sources; and then transitioning the voltage back to the first voltage waveform, wherein the second voltage waveform provides an increased voltage rate of change in comparison to the first voltage waveform and wherein transitioning the voltage provided at the output of the UPS from the first voltage waveform to the second voltage waveform in coordination with the transition of the load between the first and second power sources comprises changing a scaling of a voltage reference signal.